Cardiothoracic Surgery Board Review
Cardiothoracic Surgery Board Review
Cardiothoracic Surgery Board Review
The authors and editors would like to extend thanks to Thomas Johnson and
Mary Nan Farber for their editorial support.
http://www.knowledgetesting.com
INTRODUCTION
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and certification exams. To achieve this goal the text is written in a multiple-
choice format with answers and explanations. Explanations contain additional
information intended to reinforce your knowledge. Emphasis has been placed on
covering facts that are easily overlooked, quickly forgotten, and often show up
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Version: 1/6/2015
Table of Contents
Introduction
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Research Concepts:
Local Anesthetics:
Choices:
1. Change LMWH to unfractionated heparin
2. Give one dose of pulsed IV methylprednisolone
3. Start on coumadin
4. Discontinue all heparin products and start lepirudin
Answer: 4 - Discontinue all heparin products and start lepirudin
Explanations:
Heparin-induced thrombocytopenia is a rare but serious immune
thrombocytopenia. It is a complication of heparin therapy and is,
paradoxically, associated with venous thrombosis in approximately half of
patients.
Treatment involves the removal of all heparin products. Because this patient
has thrombosis, it is appropriate to switch to an alternative anticoagulation
strategy involving lepirudin, bivalirudin, or argatroban.
Warfarin does not act quickly enough to prevent DVT extension and
complications.
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Research Concepts:
Thrombocytopenia, Heparin Induced:
Choices:
1. Maintain ventricular preload
2. Lower afterload
3. Reestablish early reperfusion
4. Venous dilation
Answer: 4 - Venous dilation
Explanations:
The primary goal for right ventricular infarct is to reestablish perfusion
Also to lower after load and maintain preload pressure
Preload reduction with venous dilator is inappropriate
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Research Concepts:
Right Ventricular Infarction:
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Research Concepts:
Pericardial Effusion:
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Research Concepts:
Medicare Coverage:
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Research Concepts:
Adrenal Glands:
Etomidate:
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Research Concepts:
Cheyne-Stokes Respirations:
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Research Concepts:
Histoplasmosis:
Choices:
1. Bleeding from prior heel pricks
2. Capillary refill of less than 2 seconds
3. Presence of a faint murmur that sounds machinery-like, which is unchanged
from previous assessment
4. Respiratory rate of 40 breaths per minute and heart rate of 130 beats per
minute
Answer: 1 - Bleeding from prior heel pricks
Explanations:
Bleeding from prior heel prick sites should be reported to the physician
immediately. Indomethacin is a non-steroidal anti-inflammatory agent used
as an alternative to surgery for patients with a patent ductus arteriosus.
Indomethacin inhibits platelet function. Therefore, the nurse should observe
for bleeding. Capillary refill of less than 2 seconds indicates good
peripheral perfusion and low probability of congestive heart failure.
The presence of a faint machinery-like murmur is typical of a patent ductus
arteriosus (PDA). A respiratory rate of 40 breaths per minute is within
normal limits (30 to 50) for an infant.
A heart rate of 130 beats per minute is within normal limits (120 to 160) for
an infant.
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Research Concepts:
Indomethacin:
Choices:
1. 10%
2. 20%
3. 50%
4. 75%
Answer: 2 - 20%
Explanations:
The classic triad: hemoptysis, pleuritic chest pain, and dyspnea-appear in
only 20% of cases. The most common sign on physical examination is
tachypnea (> 16 breaths/min)
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Research Concepts:
Pulmonary Embolism:
Choices:
1. Zone 1
2. Zone 2
3. Zone 3
4. Zone 4
Answer: 3 - Zone 3
Explanations:
In Zone III, the pulmonary artery pressure is greater than the pulmonary
venous pressure which is greater than the pulmonary alveolar pressure.
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Research Concepts:
Pulmonary Artery Catheterization:
Choices:
1. Presence of coronary artery disease
2. Presence of left main stenosis more than 50%
3. Single vessel disease in the right coronary artery
4. Two vessel coronary disease with normal LV function
Answer: 2 - Presence of left main stenosis more than 50%
Explanations:
Indications for open heart surgery include left main stenosis > 50%, 2-3
vessel coronary artery disease, and LV dysfunction.
In a patient with severe symptoms despite maximal medical therapy,
surgery should be recommended.
Surgery should be recommended in the presence of poor LV function.
Surgery should be recommended if there are signs of LV dysfunction on
non-invasive testing and evidence of coronary artery disease.
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Research Concepts:
Revascularization Procedures In Coronary Artery
Disease:
Choices:
1. Totally occluded vein grafts are rarely source of emboli
2. Patent vein grafts are a source of emboli
3. Previous grafts should be dissected first out to prevent prolonged time on
CPB
4. All anastomosis should be done with a single cross clamp
Answer: 3 - Previous grafts should be dissected first out to prevent
prolonged time on CPB
Explanations:
It is easier and safer to reconstruct all the anastomosis on a single cross
clamp in REDO surgery.
REDO mortality is reduced by minimal handling of vein grafts and all
patent vein grafts should be minimally handled.
Prompt ligation of grafts before cardioplegia infusion should be done.
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Research Concepts:
Redo CABG:
Choices:
1. Glutamate
2. Norepinephrine
3. Acetylcholine
4. Epinephrine
Answer: 2 - Norepinephrine
Explanations:
Postganglionic sympathetic fibers use norepinephrine for transmission
Glutamate is the major excitatory neurotransmitter in the CNS
Acetylcholine is a major transmitter of parasympathetic system and
neuromuscular junction
Epinephrine is released from adrenal medulla, which is a modified
postganglionic cell
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Research Concepts:
Sympathetic Nervous System:
Norepinephrine:
Choices:
1. Infusion of leukocyte-enriched blood
2. Maintaining blood sugar levels at less than 150 mg/dl
3. Keeping oxygen saturation above 95%
4. Not shaving the night before surgery
Answer: 1 - Infusion of leukocyte-enriched blood
Explanations:
Leukocyte filtration, or leukocyte-enriched blood, has made no difference
in surgical site infections.
The best way to reduce infection rates is to control blood sugar, provide
adequate oxygen, maintain core body temperature above 36.5 degrees
Celsius, and refrain from shaving the night before surgery.
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Research Concepts:
Wound Infection:
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Research Concepts:
Blood Transfusion:
Choices:
1. Ventricular aneurysm
2. Cardiogenic shock
3. Arrhythmias
4. Pericarditis
Answer: 3 - Arrhythmias
Explanations:
90% of acute myocardial infarction patients have arrhythmias
Congestive failure is present in about 60%, pulmonary embolism in about
30%, cardiogenic shock in 10 to 15%, pericarditis in 15%, and ventricular
aneurysm in 3 to 20%
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Research Concepts:
Acute Myocardial Infarction:
Arrhythmias:
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Research Concepts:
Pericardial Effusion:
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Research Concepts:
Pulmonary Hypertension, Primary:
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Research Concepts:
Hypercalcemia:
Choices:
1. Every 2 weeks
2. Every 4 months
3. Every month
4. Every 6 months
Answer: 3 - Every month
Explanations:
Every month, although studies are looking at extending that time
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Research Concepts:
Warfarin:
Choices:
1. Dry and cold
2. Wet and warm
3. Dry and warm
4. Wet and cold
Answer: 4 - Wet and cold
Explanations:
In CHF, there is fluid accumulation in the body and the perfusion of organs
is decreased.
Physical findings in CHF include elevated JVP, basilar rales, tachycardia,
pedal edema and cool extremities.
Such patients are usually described ad wet and cold. The skin may appear
dusky and feel cold to touch.
Auscultation may reveal and S3 or a gallop.
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Research Concepts:
Heart Failure, Congestive:
Choices:
1. Oxygen
2. Digoxin
3. Furosemide
4. Dobutamine
Answer: 1 - Oxygen
Explanations:
Supplemental oxygen may exacerbate heart failure that is caused by a left-
to-right shunt by decreasing pulmonary vascular resistance and increasing
the left-to-right shunting
The acute management of heart failure due to a left-to-right shunt includes
inotropic support and diuresis
The definitive treatment is to eliminate the left-to-the right shunt with either
interventional cardiac catheterization or surgery
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Research Concepts:
Heart Failure, Congestive:
Choices:
1. Hypertension
2. Smoking
3. Family history
4. Obesity
Answer: 3 - Family history
Explanations:
All of the options are risk factors for coronary artery disease.
Hypertension, smoking, and obesity are modifiable.
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Research Concepts:
Risk Factors For Coronary Artery Disease:
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Research Concepts:
Beta-Blockers:
Choices:
1. Prevent hyperkalemia
2. Diurese the patient of extra fluid while he is awake
3. Increase myocardial contractility
4. Help wake the patient up in the morning
Answer: 2 - Diurese the patient of extra fluid while he is awake
Explanations:
When diuretics are given early in the day, the patient will void frequently
during the daytime hours and will not need to void frequently during the
night
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Research Concepts:
Heart Failure, Congestive:
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Research Concepts:
Atelectasis:
Choices:
1. Incentive spirometry
2. Bronchoscopy
3. Bronchodilator therapy
4. Effective pain control
Answer: 1 - Incentive spirometry
Explanations:
In preventing atelectasis, incentive spirometry is the most efficient way to
reduce respiratory complications.
Incentive spirometry should be taught to all patients before surgery and
encouraged soon after surgery.
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Research Concepts:
Post-op Respiratory Therapy:
Postoperative Recovery:
Choices:
1. Mitral valve prolapse
2. Innocent murmur
3. Pulmonic stenosis
4. Aortic regurgitation
Answer: 2 - Innocent murmur
Explanations:
Innocent murmurs are most common in children from 3 to 7 years
They are often musical or vibratory, short, systolic ejection murmurs at the
left midsternal or low sternal border
There is no radiation
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Research Concepts:
Innocent Murmur:
Choices:
1. Fentanyl
2. Morphine
3. Hydromorphone
4. Oxycodone
Answer: 4 - Oxycodone
Explanations:
Fentanyl is a good analgesic for PCA
Morphine has multiple adverse effects
Hydromorphone has high potency
Oxycodone is not commonly used
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Research Concepts:
Patient Controlled Anesthesia (PCA):
Choices:
1. Ultrasound
2. Bilateral breath sounds
3. Sustained end-tidal CO2
4. Sustained end-tidal O2
Answer: 4 - Sustained end-tidal O2
Explanations:
After ET tube placement, breath sounds should be present bilaterally and
absent at the stomach
Ultrasound can be used to confirm placement
Condensation in the tube indicates placement in the trachea and not the
stomach
Sustained end-tidal O2 is not a method used to evaluate placement
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Research Concepts:
Endotracheal Tube:
Choices:
1. Atrial septal defects
2. Atherosclerotic disease
3. Rib notching on x-ray
4. Claudication on walking
Answer: 3 - Rib notching on x-ray
Explanations:
The physical exam is consistent with the congenital anomaly coarctation of
the aorta. There is most often narrowing of the aorta just distal to the left
subclavian artery.
The intercostal vessels provide collateral circulation causing x-ray findings
of rib notching. If not surgically corrected, complications in adults include
death from cardiac failure, bacterial endocarditis, and rupture of aortic
aneurysms or of a cerebral artery.
Ventricular septal defects and aortic stenosis are often seen in association
with coarctation.
Claudication is a symptom of peripheral vascular .
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Research Concepts:
Aortic Coarctation:
Choices:
1. They will need to know how to activate EMS in an emergency
2. They will need to know how many joules they can be defibrillated with
3. Patients will need to resume activities slowly following surgery
4. Patients will need to carry extra batteries at all times
Answer: 1 - They will need to know how to activate EMS in an emergency
Explanations:
Implanted defibrillators may not always capture, causing the patient to need
EMS services in event of emergency
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Research Concepts:
Implanted Cardiac Defibrillator Malfunction:
Choices:
1. Damage to sural nerve
2. Damage to saphenous nerve
3. Damage to femoral nerve
4. Damage to sciatic nerve
Answer: 2 - Damage to saphenous nerve
Explanations:
Damage to the saphenous nerve will result in loss of sensation to the medial
aspect of the leg.
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Research Concepts:
Saphenous Vein Grafts:
Choices:
1. Psychologist
2. Home health nurse
3. Physical therapist
4. Social worker
Answer: 4 - Social worker
Explanations:
A social worker can aid the patient in coordinating care for her child while
she is recovering.
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Research Concepts:
Postoperative Care:
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Research Concepts:
Synchronized Electrical Cardioversion:
Choices:
1. Endocarditis
2. Cardiac myxoma
3. Rheumatic fever
4. Ruptured chordae
Answer: 2 - Cardiac myxoma
Explanations:
Myxomas are most common in young Asian females and the majority occur
in the left atrium.
Gross features will reveals a jelly-like mass with papillary extensions with
an organized thrombus. The mass can produce a ball valve effect on the
mitral valve orifice.
The myxoma may produce constitutional symptoms and can be mistaken
for vegetation from endocarditis.
Often the mass can embolize and cause stroke. Sudden deaths are
uncommon.
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Research Concepts:
Atrial Myxoma:
Choices:
1. Give 100% oxygen
2. Leg elevation
3. Diuretic
4. Volume expansion
Answer: 3 - Diuretic
Explanations:
Patients with acute tamponade do not have blood being pumped out of the
heart because of the cardiac compression, and thus fluid is vital.
Other treatment measures include oxygen, bed rest, and leg elevation.
Immediate pericardiocentesis can be life saving.
Surgery requires making a hole in the pericardium and draining the fluid.
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Research Concepts:
Cardiac Tamponade:
Choices:
1. Cardioversion
2. Verapamil
3. Procainamide
4. Amiodarone
Answer: 2 - Verapamil
Explanations:
Verapamil and digitalis may speed up conduction through the accessory
pathway.
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Research Concepts:
Atrial Fibrillation:
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Research Concepts:
Cardiogenic Shock:
Choices:
1. Begin vitamin K 1 week prior to surgery
2. Give FFP few hours before surgery
3. Stop the NSAIDs 3 weeks prior to surgery
4. Stop the NSAIDs 1 week prior to surgery
Answer: 4 - Stop the NSAIDs 1 week prior to surgery
Explanations:
The patient would not benefit from vitamin K since he does not have
abnormal clotting factors.
The patient would not benefit from FFP since he does not have abnormal
clotting factors.
NSAIDs block platelet function by causing a reversible defect in the
enzyme cyclooxygenase. Unlike aspirin, which permanently acetylates
cyclo-oxygenase and leaves affected platelets dysfunctional throughout
their 7-day life span, NSAIDs cause a reversible defect
NSAIDs with short half lives can be stopped 3 or 4 days before surgery
while those with long half lives require a week
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Research Concepts:
NSAIDS:
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Research Concepts:
Prothrombin Time:
Choices:
1. Alpha methyldopa
2. Clonidine
3. Propranolol
4. Hydralazine
Answer: 1 - Alpha methyldopa
Explanations:
Alpha methyldopa (Aldomet) is a centrally acting agent used in the
treatment of essential hypertension.
Alpha methyldopa is associated with hemolysis, which is believed to be
immune mediated.
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Research Concepts:
Antihypertensive Medications:
Choices:
1. Hydrochlorothiazide
2. Verapamil
3. Enalapril
4. Furosemide
Answer: 1 - Hydrochlorothiazide
Explanations:
Thiazide diuretics should be used with caution in diabetic patients
Insulin resistance and hyperglycemia may result from thiazide diuretic
therapy
ACE inhibitors are very helpful in diabetic patients as they decrease the risk
of nephropathy
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Research Concepts:
Thiazide Diuretics:
Insulin Resistance:
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Research Concepts:
Tetralogy Of Fallot:
Choices:
1. Child or elder abuse
2. Request by a family member
3. Professional disputes
4. By request of an attorney
Answer: 1 - Child or elder abuse
Explanations:
In cases of suspected child or elder abuse PHI must be disclosed as required
by law.
Facilitation of treatment, payment, or health care operations allows for
disclosure of Protected Health Information-PHI.
Authorization from the individual allows for PHI to be disclosed.
Only the pertinent and minimum information related to the covered entity
may be disclosed under Protected Health Information-PHI.
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Research Concepts:
Protected Health Information-PHI:
Choices:
1. Hip surgery
2. Smoking
3. Ambulation
4. Dehydration
Answer: 3 - Ambulation
Explanations:
Ambulation helps to reduce the risk of a lower extremity DVT.
Risk factors for DVT include major bone surgery, smoking, bedrest, and
dehydration.
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Research Concepts:
Deep Venous Thrombosis, Lower Extremity:
Choices:
1. Streptococcus viridans
2. Staphylococcus aureus
3. Pseudomonas aeruginosa
4. HACEK
Answer: 2 - Staphylococcus aureus
Explanations:
S. aureus is the most common causative agent for bacterial endocarditis
It is 3X more common in males than females
Echocardiography has become the indirect diagnostic method of choice for
IE
Valvular vegetations on transthoracic or transesophageal echocardiograms
portend a worse prognosis
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Research Concepts:
Endocarditis, Bacterial:
Staphylococcus Aureus:
Choices:
1. Change in mental status, cardiac arrhythmias, and tall and peaked T waves
on the electrocardiogram
2. Changes in mental status, cardiac arrhythmias, and depressed or inverted T
waves on the electrocardiogram
3. Changes in mental status and muscle weakness or flaccidity
4. Cardiac arrhythmias and neuromuscular irritability
Answer: 1 - Change in mental status, cardiac arrhythmias, and tall and
peaked T waves on the electrocardiogram
Explanations:
Potassium affects the conduction of the myocardium and its contractibility.
As a result, markedly elevated serum potassium levels cause arrhythmia
(dysrhythmias), electrocardiogram changes (tall T waves), and changes in
mental status.
Changes in mental status or cardiac arrhythmias and depressed or inverted
T waves on the electrocardiogram are signs of hypokalemia, not
hyperkalemia. Changes in mental status or muscle weakness and flaccidity
are signs of hypercalcemia, not hyperkalemia.
Cardiac arrhythmias (dysrhythmias) and neuromuscular irritability are signs
of hypocalcemia and hypokalemia, not hyperkalemia
Patient Need: Physiological Integrity
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Research Concepts:
Hyperkalemia:
Choices:
1. Loss of the P wave
2. Widening of the QRS complex
3. Peaked T wave
4. Shortened PR interval
Answer: 4 - Shortened PR interval
Explanations:
The ECG progression of hyperkalemia is initially an increase in the T wave
amplitude.
It then causes a prolonged PR interval and loss of P waves.
Widening of the QRS complex occurs next.
Sine wave pattern occurs when the QRS complex merges with the T wave,
followed by asystole.
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Research Concepts:
Hyperkalemia:
Electrocardiogram:
Choices:
1. Adding NG feedings at night
2. Explaining that patients with Down syndrome often have difficulty with
breast feeding but not bottle feeding
3. Weigh the infant before and after breast-feeding and observe the feeding
4. Offer pumped breast milk by bottle
Answer: 2 - Explaining that patients with Down syndrome often have
difficulty with breast feeding but not bottle feeding
Explanations:
Infants with Down syndrome may have feeding difficulties by breast or
bottle
In addition, children with congenital heart disease have feeding difficulties
Involvement and communication is needed between the family, primary
provider, cardiologist, and developmental therapist
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Research Concepts:
Atrioventricular Canal Defects:
Down Syndrome:
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Research Concepts:
Pulmonary Embolism:
Choices:
1. Pindolol
2. Propranolol
3. Phenoxybenzamine
4. Esmolol
Answer: 1 - Pindolol
Explanations:
Pindolol has partial agonist sympathetic activity, which is useful in the
treatment of patients with high blood pressure and asthma.
The intrinsic sympathetic activity of pindolol helps to dilate the
bronchioles.
In general, beta blockers are avoided with asthma.
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Research Concepts:
Hypertension:
Asthma:
Choices:
1. Flumazenil
2. Oxygen by nasal cannula
3. Mechanical ventilation
4. Naloxone
Answer: 3 - Mechanical ventilation
Explanations:
This patient has respiratory failure due to depressed respiratory rate
The most urgent treatment is to intubate and ventilate until the morphine
wears off.
Mechanical ventilation may still be required even if naloxone is given.
Naloxone may require multiple doses.
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Research Concepts:
Opioid Toxicity:
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Research Concepts:
Paroxysmal Atrial Tachycardia:
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Research Concepts:
Bupivacaine:
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Research Concepts:
Heart Anatomy:
Choices:
1. Bubbles in the water indicate that the chest tube is no longer needed
2. The water level should fall slightly with each spontaneous inspiration
3. The drainage system should be kept below the level of chest tube insertion
4. The chest tube should be clamped at all times when the patient is
ambulatory
Answer: 3 - The drainage system should be kept below the level of chest
tube insertion
Explanations:
Bubbles in the water arise from air in the pleural cavity.
They indicate that the chest tube is still necessary.
The water level in the tube should rise slightly with each spontaneous
inspiration.
The chest tube should generally remain open at all times; it is sometimes
clamped for a trial period prior to removal.
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Research Concepts:
Chest Tube:
Choices:
1. ll
2. lll
3. aVL
4. aVF
Answer: 3 - aVL
Explanations:
Diagnosis of an inferior wall MI based on the ECG is done by looking at
leads 2,3, and aVF
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Research Concepts:
Inferior Wall Myocardial Infarction:
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Research Concepts:
Aortic Arch:
Choices:
1. Colonoscopy with biopsy
2. Testing of stool for fecal leukocytes
3. Testing of stool for Clostridium difficile toxin
4. Gram stain of stool for curved rods
Answer: 3 - Testing of stool for Clostridium difficile toxin
Explanations:
Clostridium difficile is an aerobic, spore-forming bacillus that causes
pseudomembranous colitis due to overgrowth when the normal colonic
flora is reduced from antibiotic therapy
Fecal leukocytes are present in about half of cases and are nonspecific
Choice 4 is seen in Campylobacter jejuni infections
Pseudomembranes can be seen on colonoscopy but a less invasive test
should be ordered first
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Research Concepts:
Clostridium Difficile:
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Research Concepts:
Morphine:
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Research Concepts:
Statin Medication:
Necrotizing Myopathy:
Choices:
1. It acts on beta receptors to stimulate the heart
2. It acts on beta receptors to decrease respiratory rate
3. It can cause bradycardia
4. It can cause arrhythmias
Answer: 1 - It acts on beta receptors to stimulate the heart
Explanations:
Isoproterenol is a beta agonist that stimulates the heart, an action not
indicated in treatment of an MI
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Research Concepts:
Isoproterenol:
Choices:
1. Radial artery
2. Ulnar artery
3. Dorsalis pedis artery
4. Axillary artery
Answer: 4 - Axillary artery
Explanations:
The most common site for arterial monitoring is the radial artery, followed
by the ulnar
The least recommended site is the axillary artery
The dorsalis pedis artery should not be used in diabetics or those who have
peripheral vascular disease
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Research Concepts:
Arterial Cannulization:
Choices:
1. Stop the infusion and change the dressing
2. Secure the junction where lipids are connected
3. Place the patient in a Trendelenburg position
4. Change the dressing when the infusion is completed
Answer: 3 - Place the patient in a Trendelenburg position
Explanations:
There is a break in the line that may cause air embolism
The patient should be placed on their left side with the head lower than the
feet
The infusion should then be stopped and the dressing changed
The break in the line is not at the junction but rather at the IV site
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Research Concepts:
Central Line Complications:
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Orthostasis:
Choices:
1. Ceftriaxone
2. Cefotetan
3. Cephalexin
4. Cefepime
Answer: 3 - Cephalexin
Explanations:
Cephalexin is usually administered 1 hr before the skin incision
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Research Concepts:
Cephalexin:
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Research Concepts:
Digoxin:
Choices:
1. Sexual harassment
2. Assault
3. Battery
4. None of the above
Answer: 3 - Battery
Explanations:
Starting an IV line without permission could be judged as battery
Battery is unpermitted physical contact
An assault is an intentional act that creates an apprehension of imminent
harmful contact
Sexual harassment does not pertain to this situation
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Research Concepts:
Patient Rights:
Choices:
1. Low HDL
2. High LDL
3. Obesity
4. Diabetes mellitus
Answer: 3 - Obesity
Explanations:
Obesity itself is not an independent risk factor for CAD
Other risk factors include hypertension, smoking, and family history
This said, multiple risk factors can be addressed by encouraging weight loss
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Research Concepts:
Risk Factors For Coronary Artery Disease:
Choices:
1. An enlarged aorta
2. An incompetent aortic valve
3. An intimal flap
4. Left ventricular function
Answer: 3 - An intimal flap
Explanations:
TEE is done to identify the intimal flap, and thus helps to distinguish the
dissection from an ordinary aortic aneurysm
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Research Concepts:
Dissection, Aortic:
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Research Concepts:
Amrinone:
Choices:
1. Drug screening
2. Ability to comprehend and communicate information
3. Ability to reason and deliberate about choices
4. Attainment of legal age
Answer: 1 - Drug screening
Explanations:
Competency to refuse medical treatment entails attainment of legal age,
ability to comprehend and communicate and ability to reason and deliberate
Adherence to religious beliefs does not make one incompetent
Only recourse in a competent patient refusing medical treatment is trying to
convince them of importance of treatment
Decision-making capacity is impaired by psychosis
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Research Concepts:
Refusal of Care:
Competency:
Choices:
1. Paresthesia
2. Nausea and anorexia
3. Dry eyes
4. Dizziness and vertigo
Answer: 2 - Nausea and anorexia
Explanations:
Nausea, vomiting, and anorexia are common early adverse reactions to
digoxin (Lanoxin) administration. Paresthesia (a sensation of numbness or
tingling) is an uncommon adverse reaction to digoxin (Lanoxin)
administration.
Dry eyes is an uncommon adverse reaction to digoxin (Lanoxin)
administration.
However, yellow-green halos around images, flashes of light, diplopia
(double vision), and photophobia (unusual intolerance of light) are common
adverse reactions.
Dizziness and vertigo are adverse reactions; however, they are not early
reactions.
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Research Concepts:
Digoxin:
Choices:
1. Persistent left superior vena cava
2. Unroofed coronary sinus
3. Unrecognized atrial septal defect
4. Inadequate drainage from bicaval cannulation
Answer: 1 - Persistent left superior vena cava
Explanations:
When one sees a large amount of blood via the coronary sinus, it is
important to first assess the size of the coronary sinus.
A large coronary sinus is associated with an absent innominate vein and a
persistent left superior vena cava. This is the most benign anomaly of the
superior vena cava.
The left superior vena cava runs behind the left atrial appendage and joins
the coronary sinus just behind it. It does need to be cannulated if intra-
cardiac work is being done.
Occasionally the left superior vena cava will enter the left atrium, which
causes a right to left shunt and a mild cyanosis. This is now called an
unroofed coronary sinus, a version of an atrial septal defect.
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Research Concepts:
Congenital Heart Disease:
Choices:
1. Furosemide
2. Spironolactone
3. Triamterene
4. Hydrochlorothiazide
Answer: 1 - Furosemide
Explanations:
Furosemide is a potent diuretic that can cause orthostatic hypotension
Its effect may worsen when used with other antihypertensive medication
Thiazide diuretics and spironolactone are weaker diuretics when compared
with furosemide
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Research Concepts:
Loop Diuretics:
Orthostatic Hypotension:
Choices:
1. Naloxone
2. Pentazocine
3. Butorphanol
4. Codeine
Answer: 4 - Codeine
Explanations:
Codeine is an alkaloid of opium.
Codeine is an effective cough suppressant and is also addictive
It is a pure agonist and does not possess any antagonistic properties
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Research Concepts:
Opioid Antagonists:
Opioid Receptor:
Explanations:
The BARI trial showed that CABG produces longer survival in diabetics
than PTCA
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Research Concepts:
Revascularization Procedures In Coronary Artery
Disease:
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Research Concepts:
Amiodarone:
Choices:
1. Pulmonary function tests
2. Liver function tests
3. Cardiac enzymes
4. Chest x-ray
Answer: 4 - Chest x-ray
Explanations:
Clubbing of both hands is an asymptomatic pulmonary process that requires
chest x-ray for further evaluation.
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Research Concepts:
Nails, Clubbing:
Choices:
1. Norepinephrine
2. Epinephrine
3. Dopamine
4. Acetylcholine
Answer: 3 - Dopamine
Explanations:
Dopamine at low doses can increase renal blood flow.
At doses of 2-5 mcg/kg/hr, dopamine is frequently used to increase renal
blood flow.
At high doses, dopamine can stimulate the heart and increase blood
pressure.
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Research Concepts:
Dopamine:
Choices:
1. Hypotension
2. Hypertension
3. Tachycardia
4. Bradycardia
Answer: 3 - Tachycardia
Explanations:
Tachycardia is the first sign of intravascular volume loss
Intravascular volume loss can be secondary to blood loss or dehydration
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Research Concepts:
Hemorrhage:
Dehydration:
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Research Concepts:
Tissue Plasminogen Activator:
Choices:
1. Transient ischemic attacks
2. Migraine
3. Digoxin toxicity
4. Gastro-enteritis
Answer: 3 - Digoxin toxicity
Explanations:
Digoxin toxicity can present with many symptoms including palpitations,
mental changes, blurred vision, tendency to see green halos, diplopia,
photophobia, nausea, vomiting, headaches, and agitation.
Heart block may be present with digoxin toxicity. The cause of digoxin
toxicity may include dehydration, electrolyte changes, acute over dose,
acidosis, myocardial ischemia, erroneous dosing, and drug interactions.
Digoxin toxicity does not correlate with the levels of the drug and
endogenous digoxin-like substances can cause false positives, especially in
neonates and in people with renal insufficiency.
Treatment includes monitoring and atropine for bradycardia. Lidocaine,
phenytoin, or digoxin antibodies can be used. Quinidine and procainamide
are contraindicated as they can increase digoxin levels in the blood.
Magnesium can be used if there is ventricular fibrillation.
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Research Concepts:
Digoxin Toxicity:
Atrial Fibrillation:
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Question 86: Which of the following statements is not true in regards to
infectious endocarditis?
Choices:
1. Valve leaflets have higher rate of infection than myocardium
2. Murmurs are more detectable on the right than left side
3. Streptococcus is the most common organism for left sided endocarditis
4. Antifungal agents should be considered in immunocompromised patients
Answer: 2 - Murmurs are more detectable on the right than left side
Explanations:
Due to limited blood supply, heart valve leaflets are more susceptible to
infection
Murmurs are detected in 80 percent of patients with diseased valve on the
left side, while only 40 percent on the right side
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Research Concepts:
Endocarditis:
Choices:
1. Enalapril
2. Furosemide
3. Atenolol
4. Spironolactone
Answer: 2 - Furosemide
Explanations:
ACE inhibitors and beta blockers have well-demonstrated mortality
reduction benefits.
Spironolactone is unique among the diuretics in that it does carry an
advantageous mortality benefit.
Loop diuretics, though useful for fluid management, do not have a
demonstrated mortality benefit.
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Research Concepts:
Heart Failure, Congestive:
Choices:
1. If the ostium secundum does not close, there is a patent foramen ovale
2. The intraventricular septum is formed from the endocardial cushions
3. The septum primum and the septum secundum do not completely fuse in
about 20% of people
4. If there is an endocardial cushion defect the septum secundum can
completely separate from the atria
Answer: 3 - The septum primum and the septum secundum do not
completely fuse in about 20% of people
Explanations:
The septum primum grows from the roof of the atrium towards the
endocardial cushions at the end of the 4th week
Endocardial cushions assist in formation of the atrioventricular septum,
atrioventricular canals and the aortic and pulmonary channels
The opening between the septum primum and the endocardial cushions is
called the ostium primum
Perforations in the septum primum are the ostium secundum that allow
blood flow from right to left in the primitive atria
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Research Concepts:
Heart Embryology:
Choices:
1. Stress test
2. Holter monitor
3. Angiogram
4. Echocardiography
Answer: 4 - Echocardiography
Explanations:
Both echo and MRI are used to study the right ventricle to exclude other
cause of right ventricular dysfunction.
Other disorder which may mimic Brugada syndrome include hypertrophic
cardiomyopathy, myocarditis, or aberrant original of coronary vessels.
All patients must have analysis of serum potassium, calcium, and
magnesium.
Both potassium and calcium can generate ECG patterns that mimic Brugada
syndrome.
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Research Concepts:
Brugada Syndrome:
Choices:
1. The phrenic nerve originates at the 4th cervical nerve and gets contributions
from the 3rd and 5th cervical nerves
2. The phrenic nerve can be found anterior to the scalene muscles
3. Damage to one phrenic nerve means that the patient will no longer be able
to breathe without the use of ventilator
4. During surgery, radial incisions on the diaphragm should be made to
prevent injury to phrenic nerve branches
Answer: 3 - Damage to one phrenic nerve means that the patient will no
longer be able to breathe without the use of ventilator
Explanations:
The phrenic nerve contains both motor, sensory, and sympathetic fibers.
When there is a subphrenic abscess beneath the right diaphragm, the patient
will feel pain in the right shoulder (Kehr sign).
The phrenic nerve passes anterior to the hilum in the chest and must be
identified.
Severing one phrenic nerve can cause diaphragmatic paralysis, but the
patient can survive if the other nerve is intact.
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Research Concepts:
Phrenic Nerve:
Choices:
1. Staphylococcus and Streptococcus
2. Clostridia
3. Pseudomonas
4. Polymicrobial
Answer: 4 - Polymicrobial
Explanations:
Necrotizing fasciitis is a rapidly progressive inflammatory infection in the
deep fascia.The presence of gas forming organisms causes subcutaneous
gas.
The most common etiology is polymicrobial. Anaerobic bacteria with
aerobic Gram-negative organisms is common. In the past, group A beta-
hemolytic Streptococcus (GABS) was the most common isolate.
Contributing factors include diabetes and use of steroids
The infection usually begins with pain and erythema, followed by dusky
purple patches. Without treatment, myonecrosis and death is common.
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Research Concepts:
Necrotizing Fasciitis:
Choices:
1. Rheumatoid arthritis
2. Gout
3. Osteoarthritis
4. Septic joint
Answer: 2 - Gout
Explanations:
Gout can develop when excess uric acid deposits in joints. The majority of
patients who develop gouty joint is because of an inability to excrete uric
acid in sufficient amounts.
Individual flare-ups can occur after excess alcohol ingestion. Indulgence in
foods high in purine, rapid weight loss, starvation and trauma are other
causes of acute gout.
Medications such as aspirin can also increase uric acid levels via effects on
renal tubular transport.
Gout can also flare up with use of radiocontrast dyes and uricosuric agents.
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Research Concepts:
Gout:
Choices:
1. Digoxin
2. Captopril
3. Quinidine
4. Dobutamine
Answer: 4 - Dobutamine
Explanations:
Dobutamine is an inotropic agent with beta 1 receptor agonist activity.
Besides increasing the force of contraction of the heart, it can also be a
vasodilator for the pulmonary arteries.
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Research Concepts:
Heart Failure, Congestive:
Choices:
1. Magnetic resonance imaging (MRI) of the abdomen
2. Laboratory tests, including complete blood count, electrolytes, and
erythrocyte sedimentation rate
3. Ultrasound examination of the abdomen
4. Upper gastrointestinal series
Answer: 3 - Ultrasound examination of the abdomen
Explanations:
The patient most likely has an abdominal aortic aneurysm.
Urgent imaging with a B mode ultrasound or CT is needed.
Aneurysms greater than 5.5 cm are usually treated either by open method or
by endovascular repair.
Open operations have a mortality rate < 5%. An aneurysm of > 6 cm is
associated with a mortality rate of 50% within one year.
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Research Concepts:
Abdominal Aortic Aneurysm:
Choices:
1. Central lines
2. Congenital heart disease
3. Untreated GI disorders like hirschsprung disease
4. Over use of antibiotics for URTI
Answer: 2 - Congenital heart disease
Explanations:
Cyanotic heart disease is a very common cause of multiple brain abscesses
in children
Other causes of multiple abscesses include alcoholism, steroid use and
diabetes
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Research Concepts:
Pediatric Multiple Brain Abscesses:
Choices:
1. Tension pneumothorax
2. Acute myocardial infarction
3. Pericarditis
4. Pleurodynia
Answer: 3 - Pericarditis
Explanations:
The chest pain associated with pericarditis changes with position.
Patients get some relief when sitting forward rather than lying back.
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Research Concepts:
Pericarditis, Acute:
Choices:
1. ACE inhibitor
2. Thiazide
3. Digoxin
4. Calcium channel blocker
Answer: 4 - Calcium channel blocker
Explanations:
Congestive heart failure may be precipitated, or exacerbated, by beta
blockers, calcium channel blockers, NSAIDS, and alcohol.
Other medications that can cause CHF include pioglitazone, doxorubicin,
and cocaine.
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Research Concepts:
Heart Failure, Congestive:
Choices:
1. Atropine
2. Naloxone
3. Activated charcoal
4. Flumazenil
Answer: 2 - Naloxone
Explanations:
Naloxone is indicated in overdose with opioids, such as morphine or heroin,
and can quickly reverse respiratory depression
Atropine is indicated for toxicity to organophosphate insecticides
Activated charcoal is indicated for many oral poisons
Flumazenil is indicated for reversal of benzodiazepine overdose/poisoning
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Research Concepts:
Opioid Toxicity:
Choices:
1. Lisinopril
2. Diltiazem
3. Losartan
4. Clonidine
Answer: 3 - Losartan
Explanations:
Angiotensin I is converted by angiotensin converting enzyme to angiotensin
II.
Angiotensin II is a vasoconstrictor so blockage of angiotensin II lowers
blood pressure and is also used to treat CHF and diabetic nephropathy.
Losartan is one of several ARBs (angiotensin receptor blockers).
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Research Concepts:
Antihypertensive Medications:
Choices:
1. Elevation of blood pressure
2. Augmentation of the release of mediators
3. Inhibits the release of mediators
4. Reverses bronchospasm
Answer: 2 - Augmentation of the release of mediators
Explanations:
Epinephrine raises blood pressure, antagonizes mediators in the system, and
inhibits the release of mediators.
Bronchospasm decreases with epinephrine.
Typically epinephrine administered for anaphylaxis is given
intramuscularly, with the routine adult dose of 0.3 to 0.5 ml (1:10,000
concentration). This is usually administered in the lateral thigh at the vastus
lateralis.
Administration of epinephrine can also be given intravenously. This should
only be done in situations of cardiovascular collapse with profound
hypotension. The IV concentration is much stronger than the IM
concentration (1:1000). It is of course important to not administer the
1:1000 concentration IM.
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Research Concepts:
Anaphylaxis:
Choices:
1. Heart rate of 70-80 bpm
2. Heart rate of 50-60 bpm
3. Blood pressure of 95/70 mm Hg or less
4. Blood pressure of 120/85 mm Hg or less
Answer: 2 - Heart rate of 50-60 bpm
Explanations:
The dose of beta-blockers can be increased until a heart rate between 50-60
bpm in achieved.
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Research Concepts:
Beta-Blockers:
Choices:
1. Echocardiogram
2. Chest x-ray
3. ECG
4. Cardiac catheterization
Answer: 1 - Echocardiogram
Explanations:
The best test for confirming the diagnosis of CHF is the echocardiogram.
A definition of CHF caused by left ventricular systolic dysfunction is an
ejection fraction of less than 40%.
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Research Concepts:
Heart Failure, Congestive:
Choices:
1. Tachycardia
2. Fever
3. Decreased salivation
4. Glaucoma
Answer: 2 - Fever
Explanations:
Antimuscarinic agents should be used with caution in children because of
the danger of hyperthermia.
Blockade of the thermoregulatory sweating may result in hyperthermia or
atropine fever.
Atropine toxicity is described as feeling dry as a bone because sweating,
salivation, and lacrimation are all significantly reduced.
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Research Concepts:
Atropine:
Choices:
1. Lisinopril
2. Ramipril
3. Benazepril
4. Quinapril
Answer: 1 - Lisinopril
Explanations:
Captopril, lisinopril, and enalapril are the only ACE inhibitors that are not
prodrugs.
All other ACE inhibitors are prodrugs that require hepatic activation for
pharmacologic activity.
Using an ACE inhibitor that does not require hepatic activation would be
advantageous in patients with severe liver disease.
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Research Concepts:
Angiotensin Converting Enzyme Inhibitors (ACEI):
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Research Concepts:
Wound Healing:
Choices:
1. Rhabdomyoma
2. Lipoma
3. Myxoma
4. Pheochromocytoma
Answer: 3 - Myxoma
Explanations:
Myxoma is the most common benign tumor of the heart.
Majority of myxomas occur in the left atrium near the mitral valve and may
mimic mitral stenosis.
Myxomas are pedunculated on a stalk and can present with embolic
symptoms and constitutional features like fever, general malaise and weight
loss.
Surgery is the only treatment for a myxoma. Most patients go on to lead a
normal life. Even though recurrences are reported, these usually occur when
the surgeon has not adequately removed the mass at surgery.
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Research Concepts:
Atrial Myxoma:
Choices:
1. Phlebotomy
2. Heart transplant
3. Aspirin
4. Digoxin
Answer: 2 - Heart transplant
Explanations:
Heart transplantation is contraindicated in patients with amyloidosis
because of recurrence cardiomyopathy in allograft.
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Research Concepts:
Cardiomyopathy, Restrictive:
Amyloidosis:
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Research Concepts:
Aspirin:
Choices:
1. Heart failure
2. Stroke patients
3. People living at high altitudes
4. All of above
Answer: 4 - All of above
Explanations:
Cheyne Stokes breathing is often seen in patients with heart failure, stroke,
brain injury, and brain cancers.
This breathing is often seen in individuals living at high altitudes.
Cheyne stokes is often a feature of carbon monoxide poisoning.
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Research Concepts:
Cheyne-Stokes Respirations:
Choices:
1. Not at all
2. Platelet gtt on call to OR
3. Delay 12 hours
4. Delay 24 to 48 hours
Answer: 1 - Not at all
Explanations:
Abciximab has not been associated with excess bleeding and platelets
should be given only if bleeding is observed
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Research Concepts:
Coronary Artery Bypass Graft:
Choices:
1. Cardiogenic shock
2. Increased right atrium pressure
3. Increased left ventricular pressure
4. Infarction
Answer: 2 - Increased right atrium pressure
Explanations:
The v wave is always associated with the pressure in the right atrium.
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Research Concepts:
Swan-Ganz Catheterization:
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Research Concepts:
Muromonab CD3:
Choices:
1. Graft failure is higher in patients with <50% stenosis in the target vessel
2. Long-term patency rates of LIMA to LAD are >95% at 10 years
3. Long-term patency rates are improved in distally minimally involved target
vessels
4. Graft thrombosis is the most common cause of poor function in the
perioperative period
Answer: 4 - Graft thrombosis is the most common cause of poor function in
the perioperative period
Explanations:
Spasm of the graft the most common cause of poor function and is treated
with nitrates and verapamil.
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Research Concepts:
Internal Mammary Artery Bypass:
Choices:
1. Avoidance of penicillin
2. Education in the use of epinephrine
3. Pretreatment with diphenhydramine before administering penicillin
4. Education of family members about the dangers of anaphylaxis
Answer: 3 - Pretreatment with diphenhydramine before administering
penicillin
Explanations:
Patients with a history of anaphylaxis to penicillin should not be given the
antibiotic, or related antibiotics.
Penicillin induced anaphylaxis may be fatal.
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Research Concepts:
Anaphylaxis:
Choices:
1. 0.5 - 1.0 inches
2. 1.5 - 2.0 inches
3. 2.0 - 3.0 inches
4. At least 3.5 inches
Answer: 3 - 2.0 - 3.0 inches
Explanations:
Compression of at least 2.0 inches is the recommended depth for adults.
The chest should be allowed to completely recoil before the next
compression.
The rate should be 100/minute.
For CPR without rescue breaths the provider hould compress to a depth of
1-1.5 inches.
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Research Concepts:
Cardiopulmonary Resuscitation:
Choices:
1. A right to left shunt
2. Aortic regurgitation
3. Atrial septal defect
4. Arsenic poisoning
Answer: 2 - Aortic regurgitation
Explanations:
There are several physical signs of aortic insufficiency. These are related to
high pulse pressures and rapid decreases in blood pressure during diastole.
Quincke's sign is the pulsations of the capillary beds in the nails.
This sign is seen in acute AI in about 10% of patients.
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Research Concepts:
Aortic Regurgitation:
Choices:
1. Breath rate
2. Tidal volume
3. Inspiratory time
4. Airway resistance
Answer: 2 - Tidal volume
Explanations:
In pressure control mode, the tidal volume changes.
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Research Concepts:
Ventilator Management:
Choices:
1. Marfan syndrome
2. Down syndrome
3. Pericardial effusion
4. Mitral stenosis
Answer: 1 - Marfan syndrome
Explanations:
The above are presenting features of Marfan syndrome.
These individuals also have arachnodactyly, dissecting aortic aneurysms,
ectopia lentis (subluxation of lens), mitral valve prolapse, and recurrent
pneumothoraces.
Marfan syndrome is an autosomal dominant disorder.
The basic defect is fibrillin deficiency, which results in poor development
of aortic tissues.
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Research Concepts:
Marfan Syndrome:
Choices:
1. Minutes
2. Days
3. Years
4. Seconds
Answer: 3 - Years
Explanations:
Hyperacute transplant rejection occurs within minutes.
Acute rejection occurs within months.
Chronic rejection usually occurs after several years.
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Research Concepts:
Acute Transplant Rejection:
Choices:
1. Decreased cardiac output
2. Acidosis
3. Bradycardia
4. Restlessness
Answer: 3 - Bradycardia
Explanations:
Hypovolemic shock patients may experience tachycardia, hypotension,
confusion or restlessness
Without correction can lead to acidosis
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Research Concepts:
Hypovolemic Shock:
Choices:
1. Pericardial tamponade
2. Detachment of the commissure and aortic regurgitation
3. Detachment of the left coronary ostia and ischemia
4. Occlusion of the innominate artery take-off and stroke
Answer: 3 - Detachment of the left coronary ostia and ischemia
Explanations:
Dissection of the aorta can do all of the above except the left coronary is
very rarely involved. The right coronary is more involved.
The dissection can interrupt a blood supply and cause malperfusion.
Rupture into the pericardium is the most common cause of death in the first
week.
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Research Concepts:
Dissection, Aortic:
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Research Concepts:
Digoxin:
Choices:
1. Aspirin
2. Warfarin
3. ACE inhibitors
4. Nitroglycerin
Answer: 3 - ACE inhibitors
Explanations:
CHF is often associated with fluid overload and thus diuretics are the
mainstay of treatment.
To prevent decompensation, other first line drugs include ACE inhibitors.
ACE inhibitors have been shown to improve survival and quality of life in
patients with CHF.
Other drugs for CHF include beta blockers and spironolactone.
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Research Concepts:
Heart Failure, Congestive:
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Research Concepts:
Flail Chest:
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Research Concepts:
Pericarditis, Uremic:
Choices:
1. Verify the correct operation with the patient and surgeon
2. Administer anti-anxiety medication
3. Obtain informed consent
4. Insert an intravenous line
Answer: 2 - Administer anti-anxiety medication
Explanations:
It is important to obtain informed consent, when possible, for every patient
having emergency surgery.
It is also necessary to insert an intravenous line to administer fluids and
anesthesia drugs.
If used, anti-anxiety medication should not be administered until after
informed consent is obtained.
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Research Concepts:
Informed Consent:
Emergency Operations:
Choices:
1. Isoproterenol
2. Dopamine
3. Norepinephrine
4. Dobutamine
Answer: 1 - Isoproterenol
Explanations:
Prior to the availability of nitric oxide and nitroglycerin, isoproterenol was
sometimes used to dilate pulmonary vessels.
Isoproterenol can only be given intravenously.
Isoproterenol elevates systolic blood pressure, but lowers diastolic blood
pressure
Excess use of isoproterenol can cause tachycardia.
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Research Concepts:
Catecholamines:
Choices:
1. Rheumatic cardiac disease
2. Myxomas
3. Mitral valve prolapse
4. Aortic regurgitation
Answer: 3 - Mitral valve prolapse
Explanations:
Mitral valve prolapse is the most common valvular defect in children in the
United States
Rheumatic valvular diseases is the most common valvular disease in the
developing world
Myxomas are usually found in the left atrium
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Research Concepts:
Mitral Valve Prolapse:
Choices:
1. Prevent aspiration
2. Depress cough
3. Better oxygenate
4. More secure tubing
Answer: 3 - Better oxygenate
Explanations:
The main reason to use high volume cuff is to obtain a good seal for better
oxygenation.
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Research Concepts:
Endotrachial Tube:
Choices:
1. Adenosine echocardiography
2. Stress treadmill test
3. CT scan
4. Holter monitor
Answer: 1 - Adenosine echocardiography
Explanations:
Medications used in stress test are coronary vasodilators
Coronary vasodilators cause steal phenomenon and this exacerbates the
hypoperfusion of clogged areas
Adenosine echocardiography has the highest sensitivity
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Research Concepts:
Coronary Artery Disease:
Choices:
1. Nitrates
2. Calcium Channel blockers
3. PTCA
4. CABG
Answer: 4 - CABG
Explanations:
CABG for non-ischemic CAD is associated with higher morbidity,
mortality, postoperative MI, decreased graft patency, and earlier recurrence
of angina.
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Angina, Prinzmetal:
Choices:
1. Metoprolol
2. Atenolol
3. Esmolol
4. Sotalol
Answer: 4 - Sotalol
Explanations:
Sotalol is in the same anti-arrhythmic class as amiodarone.
Sotalol is used in the treatment of ventricular arrhythmias.
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Research Concepts:
Antiarrhythmic Medication:
Beta-Blockers:
Choices:
1. <1%
2. 1 to 5%
3. 10 to 15%
4. 100%
Answer: 2 - 1 to 5%
Explanations:
It was once thought that there was a 10 to 15% cross reactivity between
penicillin and cephalosporins. Further study has shown that the actual
number is much smaller.
Most patients who report penicillin allergy are not actually allergic.
The overestimation was due to contamination of cephalosporins with
penicillin.
The risk is greatest with first generation cephalosporins and approaches 0 in
third generation preparations.
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Research Concepts:
Penicillin Allergy:
Cephalosporins:
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ACE Inhibitors:
Choices:
1. Aortic
2. Pulmonary
3. Tricuspid
4. Mitral
Answer: 4 - Mitral
Explanations:
Cardiac involvement is very common in acute rheumatic fever. It causes
inflammation of the endocardium and often affects the mitral valve. The
mitral valve becomes dysfunctional over time and leads to arrhythmias and
ventricular failure.
Vegetations can occur on damaged valves and later become infected.
Carditis is a major criterion for diagnosis of ARF and occurs in 40% of
individuals. This many include cardiomegaly, new murmur, CHF,
pericarditis or a pericardial friction rub.
PR interval prolongation does occur in more than 20% of patients but is not
specific for ARF. Echocardiogram is used to confirm carditis and assess the
degree of mitral valve involvement.
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Research Concepts:
Rheumatic Fever, Acute:
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Research Concepts:
Atherosclerosis:
Choices:
1. Urokinase
2. Ticlopidine
3. Vitamin K
4. Cryoprecipitate
Answer: 3 - Vitamin K
Explanations:
When patients present with elevated INR following treatment with oral
anticoagulants like warfarin (Coumadin), the best antidote is vitamin K.
The route of administration depends on the patient's condition.
It can be given orally if there is no active bleeding.
It can be given subcutaneously in a more acute situation. Intravenous
administration is reserved for severe active bleeding.
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Research Concepts:
Warfarin:
Choices:
1. Hypothermia
2. Hyperkalemia
3. Hypocalcemia
4. Coagulopathy
Answer: 4 - Coagulopathy
Explanations:
Coagulopathy is common with massive blood transfusion. The cause of
dilutional thrombocytopenia
Clinically significant hypocalcaemia does not occur in normal people as
long as the liver is normal
Hypothermia can occur but most blood products are warmed up prior to
transfusion
The most common abnormality in acid base is metabolic alkalosis.
Metabolic acidosis from poor perfusion quickly resolves and the lactate is
converted into bicarbonate in the liver
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Blood Transfusion:
Open-heart Surgery:
Choices:
1. Angiotensin converting enzyme Inhibitors (ACEI)
2. Beta blockers
3. Alpha blockers
4. Calcium channel blockers
Answer: 1 - Angiotensin converting enzyme Inhibitors (ACEI)
Explanations:
Side effects from using ACEI include headache, dizziness or
lightheadedness, excessive tiredness, cough, upset stomach, loss of taste
sensation, unusual bruising, and diarrhea.
A persistent dry cough is also seen in a few patients and may require a
change in the medication. The cough may be secondary to the bradykinin
receptor.
The incidence of cough has been estimated from 3 to 35%, but is probably
at the lower end of this range.
The most serious side effect with these medications is angioedema.
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Research Concepts:
Angiotensin Converting Enzyme Inhibitors (ACEI):
Explanations:
Nitroglycerin produces peripheral vasodilation, which reduces myocardial
oxygen consumption and demand.
It also dilates coronary arteries to improve blood flow to the myocardium.
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Research Concepts:
Nitroglycerin:
Angina, Unstable:
Angina, Stable:
Tap flag to report any problems with this question.
Question 141: Which of the following signs on auscultation is most
common in the presence of a left atrial myxoma?
Choices:
1. Fixed splitting of second heart sound
2. Loud S1
3. Systolic ejection click
4. Austin flint murmur
Answer: 2 - Loud S1
Explanations:
Left atrial myxomas generally tend to present with signs and symptoms of
mitral stenosis.
A loud S1 is commonly heard because the mass tends to prolapse into the
orifice and mimics mitral stenosis.
Other findings may include elevated JVP, prominent A wave, or an S3.
A diastolic rumble or a holosystolic murmur can also be auscultated.
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Research Concepts:
Atrial Myxoma:
Choices:
1. Survival at 6 months
2. Exercise performance at 6 months
3. Overall risk of MI
4. No advantage
Answer: 2 - Exercise performance at 6 months
Explanations:
PTCA offers better symptom control and exercise performance in this
patient group
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Research Concepts:
Single Vessel Disease:
Angina, Stable:
Choices:
1. Hydrogen concentration
2. PaCO2
3. PaO2
4. Base excess
Answer: 1 - Hydrogen concentration
Explanations:
An arterial blood gas report contains pH, PaC02 and Pa02
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Research Concepts:
Arterial Blood Gas:
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Aortic Dissection:
Choices:
1. 1 hour
2. 6 hours
3. 24 hours
4. 48 hours
Answer: 2 - 6 hours
Explanations:
Heparin should be discontinued 6 hours prior to surgery.
The heparin can be restarted 12-24 hours after surgery if postoperative
hemorrhage is no longer a threat.
Heparin can be reversed with protamine.
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Research Concepts:
Preoperative Evaluation And Management:
Anticoagulation:
Choices:
1. Echocardiography
2. 24 hour holter monitor
3. Exercise stress test
4. Event monitor or loop monitor
Answer: 4 - Event monitor or loop monitor
Explanations:
Near syncope or syncope associated with palpitations are likely due to a
cardiac arrhythmia
The prognosis for cardiac causes of these complaints shows up to a 33%
one year mortality rate as compared to only 10% for non-cardiac causes
A 24 hour holter monitor is less likely to show the abnormality than an
event monitor or loop monitor.
Stress testing and echocardiography are less likely to provide the diagnosis
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Research Concepts:
Palpitations:
Choices:
1. Arrhythmias
2. Congestive heart failure
3. Contractile dysfunction
4. Mitral valve stenosis
Answer: 4 - Mitral valve stenosis
Explanations:
Cardiac valve stenosis is not a complication of an MI
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Research Concepts:
Acute Myocardial Infarction:
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Research Concepts:
Thiazide Diuretics:
Choices:
1. Bow shaped legs
2. Bony protrusion of the ankle joint
3. Increased myocardial contractility with increased heart rate
4. Decreased breathing rate with opioids
Answer: 3 - Increased myocardial contractility with increased heart rate
Explanations:
The Bowditch effect is also known as the Treppe phenomenon.
With an increase in heart rate there is also an increase in myocardial
contractility.
The explanation is the inability of the Na+/ K+ ATPase to keep up with
sodium influx at high heart rates.
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Research Concepts:
Bowditch Effect:
Choices:
1. Dobutamine
2. Hydralazine
3. Terazosin
4. Lisinopril
Answer: 4 - Lisinopril
Explanations:
ACEI can rapidly can improve symptoms in patients with congestive heart
failure.
ACEI are recommended for all patients with re-current or other symptoms
of CHF or reduced left ventricular function. ACEI decreases afterload and
permits LV remodeling. The drugs have been shown to increase survival
and decrease rate of hospitalization.
Side effects of ACEI include hyperkalemia, hypotension, cough, rash,
changes in mental state, angioedema, and dry cough
If cough develops, patients can be switched to an angiotensin receptor
blocker.
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Research Concepts:
Heart Failure, Congestive:
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Research Concepts:
Renin Angiotensin System:
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Research Concepts:
Acute Myocardial Infarction:
Choices:
1. 24 hours
2. 20 days
3. 90 days
4. 180 days
Answer: 3 - 90 days
Explanations:
About 10% of patients with a TIA will have a stoke
Most of these strokes occur within 90 days
However more than 50% of these strokes occur within 48 hours
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Research Concepts:
Transient Ischemic Attack:
Stroke:
Choices:
1. Chest pain
2. Dyspnea
3. Dizziness
4. Arm pain
Answer: 1 - Chest pain
Explanations:
Chest pain is the most common feature in patients with coronary artery
disease.
To differentiate anginal pain from other causes, it is important to ask about
the onset, provocative factors, quality of pain, region of pain and if the pain
is radiating.
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Research Concepts:
Coronary Artery Disease:
Choices:
1. Acute tubular necrosis
2. Cholesterol embolisms
3. Renal artery thrombosis
4. Acute tubular necrosis secondary to hypotension
Answer: 2 - Cholesterol embolisms
Explanations:
Disruptions of plaques in the aorta or renal arteries during left heart
catheterization can dislodge cholesterol
This can affect peripheral vasculature, bowel, pancreas, and kidneys
The urinalysis can show amorphous sediment or hyaline casts but with
ATN, granular casts would be more likely
Eosinophiluria and decreased complement levels are possible
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Research Concepts:
Cholesterol Embolism:
Choices:
1. 2 breaths for ventilation
2. Chest compressions at 100 beats/min
3. Perform cricothyrotomy
4. None of the above
Answer: 2 - Chest compressions at 100 beats/min
Explanations:
Revised CPR guidelines call for only chest compressions at 100 beats/min
Circulation is more important than ventilation
Breaths are not mandated anymore when performing CPR
Cricothyrotomies are not part of CPR
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Research Concepts:
Cardiopulmonary Resuscitation:
Choices:
1. Thiazide diuretics
2. Loop diuretics
3. Spironolactone
4. Acetazolamide
Answer: 2 - Loop diuretics
Explanations:
Loop diuretics act on the thick ascending loop of Henle.
Electrolyte reabsorption mostly occurs in the thick ascending loop of Henle.
Acetazolamide acts on proximal tubules. Most of the filtered electrolyte are
reabsorbed later.
Thiazide and spironolactone are weak diuretics when compared with loop
diuretics.
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Research Concepts:
Loop Diuretics:
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Research Concepts:
Pindolol:
Choices:
1. Complication of anticoagulation
2. Presence of a free-floating iliofemoral thrombus
3. Prophylaxis for deep venous thrombosis
4. Contraindication of anticoagulation therapy
Answer: 4 - Contraindication of anticoagulation therapy
Explanations:
Inferior vena cava filters are not often used because there is not much solid
data to support their use. The most common indication for inferior vena
cava filters is in individuals who have a contraindication to anticoagulation
therapy.
Contraindications to anticoagulation may be due to hemorrhagic strokes,
trauma, brain tumors, pregnancy, or poor patient compliance. These
individuals may benefit from an inferior vena cava filter.
An inferior vena cava filter is less commonly indicated for patients who
have a complication from anticoagulation therapy.
A free-floating thrombus was once an indication for an inferior vena cava
filter, but today evidence does not show that such patients are at high risk
for pulmonary embolism.
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Research Concepts:
Inferior Vena Cava Filters:
Choices:
1. External defibrillation
2. Precordial thump
3. Cardiopulmonary resuscitation
4. Consider epinephrine every 3-5 minutes
Answer: 2 - Precordial thump
Explanations:
Precordial thump is only used in witnessed monitored arrest where no
defibrillator is available
Always check airway, start CPR and administer defibrillation shock at 200
joules
Amiodarone and epinephrine can be administered during the arrest
Post resuscitation; one should maintain lidocaine at 1-4 mg/min or start an
amiodarone drip
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Research Concepts:
Ventricular Fibrillation:
Choices:
1. Positive end expiratory pressure
2. Intermittent mandatory ventilation
3. Synchronous intermittent mandatory ventilation
4. Assist control ventilation
Answer: 1 - Positive end expiratory pressure
Explanations:
PEEP increases alveolar recruitment
It also decreases shunting improving gas exchange and reduces FIO2
requirements
PEEP can reduce cardiac filling by increasing intrathoracic pressure
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Research Concepts:
Positive End-Expiratory Pressure (PEEP):
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Research Concepts:
Amlodipine:
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Research Concepts:
Drug Metabolism:
Drug Elimination:
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Research Concepts:
Toxic, Beta-Blocker:
Choices:
1. Beta-blockers
2. Calcium channel blockers
3. ACE inhibitors
4. Class 3 antiarrhythmics
Answer: 1 - Beta-blockers
Explanations:
Beta-blockers are the drugs of choice for long-term control of torsades.
Beta-blockers should be used with caution if bradycardia is present.
Asymptomatic patients may be observed without drug treatment.
Permanent pacing is also used in some patients who are on maximal doses
of beta-blockers.
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Research Concepts:
Torsade de Pointes:
Choices:
1. There is anomalous systemic arterial supply
2. There is hypoplasia of right lung
3. Venous drainage is to the superior vena cava
4. There may be associated congenital heart defects
Answer: 3 - Venous drainage is to the superior vena cava
Explanations:
Scimitar syndrome has anomalous venous drainage to the inferior vena
cava. This vein appears as a "Turkish Sword" on chest x-ray.
There is anomalous arterial supply from the aorta or the pulmonary artery.
The lung is usually hypoplastic. In most cases, an atrial septal defect is not
present.
Surgery may involve a pneumonectomy if the right lung is not functional.
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Research Concepts:
Scimitar Syndrome:
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Research Concepts:
Isoproterenol:
Choices:
1. Norepinephrine
2. Atropine
3. Milrinone
4. Fluids
Answer: 1 - Norepinephrine
Explanations:
Norepinephrine is a catecholamine mediator of the sympathetic nervous
system.
It is the best treatment of hemodynamic collapse in septic shock and should
be considered if the condition is refractory to fluid resuscitation.
It stimulates alpha and beta-1 adrenergic receptors causing vasoconstriction
and increased cardiac output.
Other essential components of treatment include respiratory support to
insure adequate oxygenation, antimicrobial therapy, and metabolic support.
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Research Concepts:
Shock, Septic:
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Research Concepts:
Potassium Sparing Diuretics:
Choices:
1. Ventilation perfusion scintigraphy
2. Arterial blood gas
3. CT pulmonary angiogram
4. Cardiac US
Answer: 3 - CT pulmonary angiogram
Explanations:
The current first recommended test to diagnose a pulmonary embolism is
CT pulmonary angiography.
CT pulmonary angiography has a sensitivity and specificity as good as
conventional pulmonary angiography with far less morbidity, invasiveness,
cost, and need for angiographic expertise.
V/Q scintigraphy remains an alternative in those patients allergic to
iodinated IV contrast administration.
CT pulmonary angiography is the initial recommended study of choice even
in the context of pregnancy.
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Research Concepts:
Pulmonary Embolism:
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Research Concepts:
Aztreonam:
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Research Concepts:
Pleural Anesthesia:
Choices:
1. Neck muscle strengthening exercises
2. Daycare outside the home
3. Interventions on feeding with feedback
4. Starting solid foods
Answer: 3 - Interventions on feeding with feedback
Explanations:
Early Interventions would involve a pediatric developmental feeding team
The most important goal with this patient is improved nutrition and weight
gain
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Research Concepts:
Atrioventricular Canal Defects:
Down Syndrome:
Choices:
1. Palpitations, dyspnea, and sweating
2. Chest pain, syncope, and fatigue
3. Syncope, fatigue, and palpitations
4. Diaphoresis, syncope, and dizziness
Answer: 2 - Chest pain, syncope, and fatigue
Explanations:
Aortic stenosis can present with chest pain syncope and symptoms of heart
failure.
Aortic stenosis in young people is rare and symptoms develop gradually.
Bicuspid aortic valve is the most common cause of aortic stenosis.
Degenerative aortic stenosis occurs in elderly people.
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Research Concepts:
Aortic Stenosis:
Choices:
1. Oral loading of digoxin
2. Surgical closure of defect and repair of valve
3. Annual echocardiograms to assess progression of the lesions
4. Cardiac catheterization to measure chamber pressures
Answer: 2 - Surgical closure of defect and repair of valve
Explanations:
The earlier the repair the lower chance of progressive aortic insufficiency.
The defect should be closed and the valve repaired.
In some cases, only the VSD is closed and the valve observed for
progression.
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Research Concepts:
Ventricular Septal Defect:
Choices:
1. Calcium channel blockers
2. Beta blockers
3. ACE inhibitors
4. Diuretics
Answer: 4 - Diuretics
Explanations:
The least expensive antihypertensive medications are diuretics.
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Research Concepts:
Antihypertensive Medications:
Choices:
1. Esmolol
2. Captopril
3. Amiodarone
4. Lidocaine
Answer: 1 - Esmolol
Explanations:
When a patient has atrial fibrillation with a high ventricular rate, the rhythm
can be converted to VT and thus a beta-blocker or a calcium channel
blocker must be used.
Either esmolol or diltiazem can be used prior to cardioversion.
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Research Concepts:
Atrial Fibrillation:
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Research Concepts:
Hypertensive Emergencies:
Choices:
1. Initiation of bypass
2. Termination of bypass
3. Cannulation of femoral artery
4. Cannulation of aortic graft
Answer: 1 - Initiation of bypass
Explanations:
With an ascending aortic dissection, the femoral vessels must be cannulated
first and the patient must be on femoral-femoral bypass. Later, a cannula
can be inserted into the right atrium.
The femoral artery cannula must be in the true lumen. Otherwise
malperfusion will occur.
The perfusion pressure will be very low if you cannulate the false lumen.
Transesophageal echocardiography is used nowadays to check for
malperfusion.
It is this phase, the initiation of perfusion, that represents the period of
maximal risk of malperfusion, as circulation shifts from antegrade to
retrograde via the femoral artery.
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Research Concepts:
Dissection, Aortic:
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Research Concepts:
Quality of Life:
Futile Treatment:
Choices:
1. Suprapubic cystotomy
2. Foley catheter
3. Re-explore patient
4. Give fluids
Answer: 2 - Foley catheter
Explanations:
In a post operative patient who has lower abdominal discomfort and has not
voided for 12 hours, urinary retention should be the first diagnosis.
A foley catheter can be inserted at the bedside.
If one is not able to place a foley, then a urology consult may be required
for placement of a suprapubic catheter.
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Research Concepts:
Urinary Retention:
Choices:
1. Unstable angina
2. Non-ST segment elevation myocardial infarction (NSTEMI)
3. ST segment elevation myocardial infarction (STEMI)
4. All of the above
Answer: 4 - All of the above
Explanations:
The ACS continuum consists of unstable angina, NSTEMI and STEMI
Most patients with STEMI develop pathological Q waves
Patients with NSTEMI do not develop pathological Q waves
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Research Concepts:
Acute Coronary Syndromes:
Choices:
1. Decrease
2. Increase
3. Disappear
4. No effect at all
Answer: 1 - Decrease
Explanations:
The valsalva maneuver is a moderately forceful attempted exhalation
against a closed airway
The maneuver causes the murmur of AS to decrease
It also decreases the murmurs of pulmonic stenosis and tricuspid
regurgitation
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Research Concepts:
Valsalva Maneuver:
Aortic Stenosis:
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Research Concepts:
Cardiogenic Shock:
Choices:
1. Amlodipine
2. Metoprolol
3. Diltiazem
4. Verapamil
Answer: 2 - Metoprolol
Explanations:
Patients with known coronary artery disease benefit from beta blockers and
aspirin
Calcium channel blockers are generally avoided
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Research Concepts:
Angina, Stable:
Choices:
1. It decreases significantly
2. It does not change
3. It increases significantly
4. It is variable but does not change significantly
Answer: 4 - It is variable but does not change significantly
Explanations:
Submaximal exercise does not change diastolic blood pressure significantly
It may increase or decrease less than 10 mm Hg
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Research Concepts:
Cardiac Rehabilitation:
Therapeutic Exercise:
Choices:
1. SA node
2. Bundle of hiss
3. Pectinate muscle
4. AV node
Answer: 4 - AV node
Explanations:
The AV node is supplied by the posterior interventricular artery.
This arises from the right coronary artery in 70% of patients making them
"right dominant".
It arises from the left circumflex artery in 30% of patients making them
"left dominant".
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Research Concepts:
Heart Anatomy:
Choices:
1. 2.0-3.0
2. 1.0-1.5
3. 2.5-3.5
4. 1.5-2.5
Answer: 1 - 2.0-3.0
Explanations:
INR should be kept between the ranges of 2.0 to 3.0 for most indications
For mechanical prosthetic heart valves INR of 2.5 to 3.5 is recommended
An INR greater than 5 is likely to result in spontaneous bleeding
If the INR is very high or the patient is bleeding, fresh frozen plasma
should be given
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Research Concepts:
International Normalized Ratio (INR):
Choices:
1. Digoxin
2. Amiodarone
3. Sotalol
4. Beta blockers
Answer: 1 - Digoxin
Explanations:
Postoperative atrial fibrillation occurs in anywhere from 20 to 40 percent of
cases. It is often difficult to prevent.
Preoperative use of beta blockers, sotalol, and amiodarone may help reduce
atrial fibrillation in most patients.
Other data indicate that atrial pacing may also reduce the risk of developing
atrial fibrillation.
Most postoperative atrial fibrillation does resolve by the 6th postoperative
week.
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Research Concepts:
Atrial Fibrillation:
Choices:
1. Alpha blockers
2. Calcium channel blockers
3. Diuretics
4. ACE inhibitors
Answer: 4 - ACE inhibitors
Explanations:
ACE Inhibitors have been shown to reduce mortality and morbidity in
congestive heart failure.
ACE inhibitors reduce aldosterone secretion, reduce salt and water
retention, and decrease afterload.
ACE inhibitors are now considered first line drugs for congestive heart
failure.
Beta blockers also decrease mortality.
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Research Concepts:
Heart Failure, Congestive:
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Research Concepts:
Internal Mammary Artery:
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Research Concepts:
Anticoagulation:
Choices:
1. Seen with infection, metabolic and endocrine imbalances, pregnancy,
2. Rarely seen with prescription medications
3. Seen with cardiac problems, such as arrhythmias, CHF, MI, hypovolemia,
angina
4. Seen with substance abuse or dependence or withdrawal, even caffeine,
MSG
Answer: 2 - Rarely seen with prescription medications
Explanations:
Many prescription medications cause anxiety-bronchodilators, stimulants,
akathisias from phenothiazine related medications, and antinausea meds,
anticholinergic and digoxin toxicity
Also seen in respiratory problems such as asthma, COPD, pneumothorax
Seen in neurologic problems
Seen in secreting tumors such as carcinoid, pheochromocytoma, insulinoma
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Research Concepts:
Anxiety:
Choices:
1. Gemfibrozil
2. Niacin
3. Atorvastatin
4. Ezetimibe
Answer: 2 - Niacin
Explanations:
Nicotinic acid increases HDL an average 20 percent
Unfortuntely, this does not seem to change risk of cardiac events and may
increased risk of stroke.
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Research Concepts:
Niacin:
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Research Concepts:
Lesser Saphenous Vein:
Choices:
1. Re stenting
2. Rotablade with thrombolytics
3. Angioplasty with radiation
4. Surgery
Answer: 4 - Surgery
Explanations:
After numerous percutaneous procedures on the same vessel and recurrent
stenosis, it is best to refer this patient for surgery. A LIMA to LAD will
suffice.
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Research Concepts:
Restenosis:
Choices:
1. Malnutrition
2. Use of corticosteroids
3. Diabetics
4. Type of suture
Answer: 4 - Type of suture
Explanations:
Anyone can develop a wound infection postoperatively.
Individuals at high risk for wound infections include diabetics, those on
corticosteroids, and the malnourished.
Both radiation therapy and use of chemotherapeutic drugs are also risk
factors.
There is no correlation between type of suture used and wound infections,
as long as the proper technique of closure has been utilized.
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Research Concepts:
Wound Infection:
Choices:
1. Left subclavian vein
2. Right subclavian vein
3. Right atrium
4. Aorta
Answer: 1 - Left subclavian vein
Explanations:
The thoracic duct empties into the left subclavian vein.
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Research Concepts:
Thoracic Duct:
Choices:
1. Make a vertical incision from the top to bottom of pericardium
2. Make a cut in the posterior pericardium to drain blood
3. Make a cut in the horizontal fashion anteriorly
4. Make three cruciate incisions
Answer: 3 - Make a cut in the horizontal fashion anteriorly
Explanations:
Phrenic nerve injury is a real possibility and often this structure is not
visualized
The pericardium must be opened anteriorly in a parallel fashion to the heart
The incision should never be vertical as the chances of cutting the nerve are
high
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Research Concepts:
Emergency Room Thoracotomy:
Cardiac Tamponade:
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Research Concepts:
Ventilator Management:
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Research Concepts:
Advance Directives:
Choices:
1. Amiodarone drip
2. IV heparin with immediate transthoracic cardioversion
3. IV metoprolol
4. Adenosine push
Answer: 3 - IV metoprolol
Explanations:
In atrial fibrillation with rapid ventricular response, the most important
immediate issue is rate control best achieved by metoprolol or diltiazem
Cardioversion is an appropriate step, however anticoagulation is generally
advised with heparin for 24 hours prior to transesophageal cardioversion
Adenosine is used in supraventricular tachycardia
Amiodarone is appropriate for maintaining rate control in a converted
patient
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Research Concepts:
Paroxysmal Atrial Fibrillation:
Choices:
1. Cholestyramine
2. Gemfibrozil
3. Niacin
4. Pravastatin
Answer: 3 - Niacin
Explanations:
Niacin is the first drug of choice for high triglycerides as it decreases
cardiovascular events but not overall mortality
Statins are second choices for hypertriglyceridemia
Statins are first choice to lower high LDL levels
Fibrates are used for hypertriglyceridemia but have not been shown to
affect cardiovascular mortality
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Research Concepts:
Hypertriglyceridemia:
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Research Concepts:
Delirium Tremens:
Choices:
1. Blood pressure
2. Neurological status
3. Weight
4. Skin turgor
Answer: 3 - Weight
Explanations:
Fluid status is best evaluated with daily weight measurements.
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Research Concepts:
Fluid Status:
Choices:
1. Check pulse oximetry
2. ABG
3. Hand bag the patient and check the machine
4. CXR
Answer: 3 - Hand bag the patient and check the machine
Explanations:
Machine malfunction should be the first thing ruled out.
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Research Concepts:
Desaturation:
Mechanical Ventilation:
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Research Concepts:
Pulsus Paradoxus:
Choices:
1. It stimulates the SA node.
2. It blocks sodium uptake.
3. It enhances vagal tone on the AV node.
4. It acts centrally and decreases sympathetic drive.
Answer: 3 - It enhances vagal tone on the AV node.
Explanations:
Digoxin acts at the AV node and is thought to enhance the vagal tone,
thereby decreasing the heart rate.
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Research Concepts:
Digoxin:
Choices:
1. HIV patients
2. Young children
3. Elderly
4. A patient who develop Guillain-Barre syndrome after vaccination in the
past
Answer: 4 - A patient who develop Guillain-Barre syndrome after
vaccination in the past
Explanations:
Influenza vaccine is recommended for HIV infected people, the young, the
elderly, and pregnant patients
Contraindications to the inactivated influenza virus include GBS within 6
weeks of immunization, severe allergies to the vaccine or components, or
patients with current infections
If a patient can eat loosely cooked eggs they can receive the vaccination
Adults with comorbidities are given priority for influenza vaccination
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Research Concepts:
Influenza Vaccine:
Choices:
1. Presence of ASD
2. Coarctation of aorta
3. Pulmonary stenosis
4. Right ventricular hypertrophy
Answer: 3 - Pulmonary stenosis
Explanations:
With a single AV valve, there is rapid development of pulmonary
hypertension because of the massive left to right shunt.
When pulmonary hypertension develops at birth, survival is impossible
without a transplant.
If there is pulmonic stenosis, the lungs remain protected but the patient can
still survive.
In congenital heart disease, protection of the lungs from excessive blood
flow is critical. When pulmonary hypertension develops, one needs to
transplant both the lungs and the heart- with a decline in organ donation, the
prognosis is poor.
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Research Concepts:
Congenital Heart Disease:
Choices:
1. Uncompensated metabolic alkalosis
2. Compensated respiratory alkalosis
3. Uncompensated respiratory alkalosis
4. Compensated metabolic alkalosis
Answer: 3 - Uncompensated respiratory alkalosis
Explanations:
ABG interpretation is uncompensated respiratory alkalosis
pH is elevated indicating alkalosis
HCO3 is normal ruling out a metabolic component
PCO2 is decreased indicating a respiratory component
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Research Concepts:
Respiratory Alkalosis:
Choices:
1. Skin biopsy
2. MRI
3. Molecular testing
4. Ultrastructure examination of collagen fibrils
Answer: 1 - Skin biopsy
Explanations:
Skin biopsy findings are non-diagnostic and should not be done.
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Research Concepts:
Ehlers-Danlos Syndrome:
Choices:
1. Cancer
2. Pulmonary embolus
3. Pneumonia
4. Ulcer
Answer: 2 - Pulmonary embolus
Explanations:
More than 650,000 patients have pulmonary embolisms in the U.S. each
year making it the 3rd most common cause of death.
It is possibly the second most common cause in most age groups of
unexpected death. It is common in hospitalized patients.
Autopsy studies show that up to 60% of patients that die in the hospital had
pulmonary embolisms but it had only been diagnosed in 30%.
It is recognized as a common complication postoperatively but also is
common in medical inpatients.
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Pulmonary Embolism:
Choices:
1. Chest pain
2. Itchy hives
3. Difficulty swallowing
4. Abdominal pain
Answer: 3 - Difficulty swallowing
Explanations:
Hereditary angioedema can often worsen with any type of trauma.
The major course of morbidity is laryngeal edema. A patient complaining of
oral cavity symptoms is an ominous warning.
Angioedema can rapidly progress and cause complete airway obstruction in
no time at all.
Other then swallowing difficulties, patients may complain of changes in
voice, cough, or excess secretions. Intubation and/or tracheostomy are not
uncommon.
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Hereditary Angioedema:
Choices:
1. Rupture of the left ventricle due to myocardial infarction
2. Mural thrombosis
3. Ventricular aneurysm
4. Rupture of the papillary muscle
Answer: 1 - Rupture of the left ventricle due to myocardial infarction
Explanations:
An acute MI can result in rupture of the left ventricular wall and acute
tamponade.
This may end up as a left ventricular aneurysm if the rupture is not
complete.
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Research Concepts:
Cardiac Tamponade:
Choices:
1. 15 pack years
2. 12.5 pack years
3. 10 pack years
4. 5 pack years
Answer: 4 - 5 pack years
Explanations:
Pack years = number of years the patient smoked X the number of packs
smoked per day.
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Research Concepts:
Smoking:
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Anxiety:
Choices:
1. Both can be used to treat atrial and ventricular arrhythmias
2. Both can prolong the PR interval
3. Both can prolong the QRS interval
4. Both can cause lupus
Answer: 4 - Both can cause lupus
Explanations:
Procainamide can cause a lupus like syndrome.
Quinidine can cause cinchonism.
Procainamide induced lupus can be distinguished by checking for
antihistone antibodies.
Other risk factors include use of vitamin D supplements.
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Research Concepts:
Antiarrhythmic Medication:
Choices:
1. Pericardial tamponade can be differentiated from tension pneumothorax
using pulmonary artery waveform characteristics
2. Unless there is structural heart disease, a pulmonary capillary wedge
pressure higher than the diastolic pulmonary artery pressure is most likely
an artifact
3. A central venous pressure is as accurate as pulmonary capillary wedge
pressure for monitoring volume status in young healthy patients
4. Pulmonary artery occlusion pressure directly measures left ventricular
filling pressure
Answer: 2 - Unless there is structural heart disease, a pulmonary capillary
wedge pressure higher than the diastolic pulmonary artery pressure is most likely
an artifact
Explanations:
Generally, pulmonary artery diastolic pressure is 1-5 mmHg higher than the
pulmonary artery wedge pressure. A pulmonary capillary wedge pressure
higher than the pulmonary artery diastolic pressure is seen in mitral
regurgitation, otherwise suspect artifact
Both pericardial tamponade and tension pneumothorax would result in
flattened waves and equalization of pressures.
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Research Concepts:
Pulmonary Artery Catheterization:
Choices:
1. Ovary
2. Pancreas
3. Liver
4. Lung
Answer: 4 - Lung
Explanations:
Lung cancer is most associated with pericardial effusion
Responsible for 37 for the cases
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Research Concepts:
Pericardial Effusion:
Choices:
1. Survival rate for ruptured AAA is 40%
2. Over the next 5 years the patient has a 40% risk of rupture
3. Surgical repair presents normal cardiac risk
4. The AAA should be monitored yearly with ultrasound
Answer: 2 - Over the next 5 years the patient has a 40% risk of rupture
Explanations:
AAA can be followed if there is no pain and if it is <5 to 5.5 cm
The risk of surgery is increased as these patients have CAD but the risk of
rupture outweighs this risk at 5 cm
Of patients with ruptured AAAs only 18% survive surgery
Risk factors for AAA are PVD, hypertension, smoking, family history, male
gender, and increasing age
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Research Concepts:
Abdominal Aortic Aneurysm:
Choices:
1. Waddell sign
2. Trousseau sign
3. Homans sign
4. Popliteal sign
Answer: 3 - Homans sign
Explanations:
Homans sign is a potential indicator of DVT
A positive sign is indicated by pain in the calf with abrupt dorsiflexion of
the foot with the knee flexed 90 degrees
The sign has poor positive and negative predictive value for DVT
As a result, its use has fallen into disfavor
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Deep Venous Thrombosis, Lower Extremity:
Choices:
1. Nasogastric (NG) tube
2. Placement of an arterial line
3. Chest MRI
4. None of the above
Answer: 1 - Nasogastric (NG) tube
Explanations:
NG tube placement increases risk of aspiration pneumonia
Other procedures increasing risk for aspiration pneumonia include
endotracheal intubation, bronchoscopy, gastrostomy feeding tubes,
tracheostomy and upper endoscopy
All can contribute to colonization of gastric contents or introduce gastric
contents directly into the lungs
Placement of an arterial line or chest MRI do not contribute to aspiration
pneumonia
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Research Concepts:
Aspiration Pneumonia:
Nasogastric Tube:
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Research Concepts:
Patent Ductus Arteriosus:
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Digoxin:
Choices:
1. Aortic arch
2. Ascending aorta
3. Descending aorta
4. Abdominal aorta
Answer: 2 - Ascending aorta
Explanations:
About 10% of aortic transections following trauma occur in the ascending
aorta. Vertical forces of deceleration tend to lead to rupture of the ascending
aorta and arch, whereas horizontal forces lead to rupture of the descending
aorta.
The aortic transection is most common in the distal ascending aorta, near
the origin of the innominate artery. Less commonly, it can occur in the
proximal ascending aorta.
As in the descending aorta, the transection may be complete or partial.
When patients survive the acute transection period, the periaortic hematoma
usually begins to liquefy about 2 weeks after the traumatic event. It is
gradually absorbed back into the aorta and a false aneurysm develops. The
false aneurysm may remain stable for a long period and even calcify, but
eventually it enlarges and ruptures.
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Research Concepts:
Aorta, Trauma:
Choices:
1. Captopril
2. Lisinopril
3. Enalapril
4. Olmesartan
Answer: 4 - Olmesartan
Explanations:
Olmesartan is an angiotensin II receptor blocker used in hypertension
Angiotensin II receptor blockers do not affect bradykinin metabolism
These medications do not cause dry cough that is common with use of ACE
inhibitors
Losartan is another angiotensin II receptor blocker used for hypertension
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Research Concepts:
Angiotensin II Receptor Blockers:
Choices:
1. Neurogenic tumors are more common in females
2. Even if these lesions are asymptomatic, they should be removed
3. Infiltration of the vertebral column suggests malignancy
4. Surgery involves a combined neurosurgical and a thoracic procedure
Answer: 3 - Infiltration of the vertebral column suggests malignancy
Explanations:
Neither symptoms nor the invasion of the spinal cord indicates malignancy
with neurogenic tumors.
Neurogenic tumors are more common in females.
Thoracic surgery is done in combination with neurosurgery with the
neurosurgical part taking place first.
An MRI should be done to assess spinal cord invasion.
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Research Concepts:
Neurogenic Tumors:
Explanations:
Propofol is a lipid soluble intravenous sedative hypnotic
It has rapid onset and rapid disappearance of action
It decreases postoperative nausea and vomiting at low dose
It can cause vasodilatation and hypotension and should be used with
caution in patients with cardiovascular disease
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Research Concepts:
Propofol:
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Research Concepts:
Anticoagulation:
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Research Concepts:
Naloxone:
Choices:
1. Urokinase
2. Ticlopidine
3. Vitamin K
4. Cryoprecipitate
Answer: 3 - Vitamin K
Explanations:
When patients present with an elevated international normalized ratio
following treatment with oral anticoagulants like Warfarin or Coumadin,
the best antidote is vitamin K.
Vitamin K can be given orally, intravenously, or intramuscularly as a 10 mg
dose.
Parenteral administration will correct the international normalized ratio
more quickly.
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Research Concepts:
Anticoagulation:
Choices:
1. Aortic dissection
2. Hypertrophic cardiomyopathy
3. Constrictive pericarditis
4. Pneumothorax
Answer: 3 - Constrictive pericarditis
Explanations:
Constrictive pericarditis can mimic cardiac tamponade. The diagnosis is
made by obtaining pressures during cardiac catheterization.
If the membrane is thick, it may be visualized on echo.
Other causes that may mimic cardiac tamponade include tension
pneumothorax, pulmonary embolism, effusion pericarditis, and tension
pneumopericardium.
Acute cases of cardiac tamponade need urgent drainage.
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Research Concepts:
Cardiac Tamponade:
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Research Concepts:
Patent Ductus Arteriosus:
Choices:
1. Not at all
2. Platelet gtt on call to OR
3. Delay 12 hours
4. Delay 24 to 48 hours
Answer: 1 - Not at all
Explanations:
Abciximab has not been associated with excess bleeding and platelets
should be given only if bleeding is observed.
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Research Concepts:
Coronary Artery Bypass Graft:
Abciximab:
Choices:
1. Nerves
2. Eyes
3. Kidneys
4. Liver
Answer: 4 - Liver
Explanations:
The liver is not affected by diabetes.
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Research Concepts:
Diabetes Mellitus, Type 2:
Choices:
1. Nitroprusside
2. Furosemide
3. Prazosin
4. Nifedipine
Answer: 1 - Nitroprusside
Explanations:
In hypertensive emergency, the high blood pressure needs to be dealt with
swiftly
Nitroprusside is a rapid vasodilating agent that can be used in such cases
Diuretics like furosemide are helpful in long term management
Alpha blockers and dihydropyridines are not suitable for management of
hypertensive emergency
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Research Concepts:
Hypertensive Emergencies:
Choices:
1. Negligence
2. Critical incident
3. Lack of standards
4. Malpractice
Answer: 4 - Malpractice
Explanations:
In order to claim malpractice one must prove professional misconduct
and/or performing a procedure outside the practitioner's scope of practice
Negligence refers to the failure to use a level of care determined to be
reasonable and appropriate under certain circumstances
Critical incidence is an incident that can lead to sever harm if not
recognized and corrected
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Research Concepts:
Medical Malpractice:
Choices:
1. Fever
2. Chills
3. Tachycardia
4. Dyspnea
Answer: 1 - Fever
Explanations:
The most common adverse reaction to a blood transfusion is a fever.
Hemolytic reactions include tachycardia, chills, chest pain, back pain,
headache, and cyanosis.
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Research Concepts:
Blood Transfusion:
Choices:
1. Warfarin
2. Dextran
3. Clopidogrel
4. Streptokinase
Answer: 3 - Clopidogrel
Explanations:
Clopidogrel, antiplatelet drug, is used to prevent strokes and coronary
restenosis by inhibiting platelet aggregation
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Research Concepts:
Clopidogrel:
Choices:
1. Administer IV fluids
2. Chest tube
3. Needle decompression
4. CXR
Answer: 3 - Needle decompression
Explanations:
The first step with tension pneumothorax is to release the air.
Needle thoracotomy is the best method.
Chest tube is placed after needle decompression.
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Research Concepts:
Pneumothorax:
Choices:
1. Stunned myocardium
2. Hibernating myocardium
3. Infarcted myocardium
4. Both 1 and 3
Answer: 2 - Hibernating myocardium
Explanations:
Infarcted myocardium is irreversibly damaged and can not improve with
any interventions, save for transplantation.
Hibernating myocardium is a state of an impaired left ventricle at rest due
to decreased coronary blood flow, which if restored to normal leads to
recovery. This is a salvageable myocardium and the injury is reversible.
Hibernating myocardium is a less severe form of injury and reverts to
normal after coronary artery bypass grafting.
In stunned myocardium, there is left ventricular dysfunction without cell
death. This occurs following restoration of blood flow after an ischemic
episode. This injury is reversible and is thought to occur most likely as a
result of calcium overload, free radicals, and a generalized inflammatory
state. The treatment is supportive, including pharmacology and an intra-
aortic balloon pump.
Stunned myocardium has decreased contractility and decreased diastolic
compliance. In patients without hibernating or stunned myocardium,
medical management or transplant is a better option.
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Research Concepts:
Hibernating And Stunned Myocardium:
Choices:
1. Blood pressure control
2. Control diabetes
3. Exercise
4. Statins
Answer: 4 - Statins
Explanations:
Statins have been shown to lower cholesterol and reduce the risk of
coronary artery disease.
Statins also help reduce weight if the diet is also modified.
Surgery for coronary artery disease is fraught with complications. The
results are average at best.
Exercise and control of blood pressure is also recommended.
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Research Concepts:
Atherosclerosis:
Choices:
1. Septomarginal trabecula
2. Sinus venarum
3. Ascending aorta
4. Crista terminalis
Answer: 1 - Septomarginal trabecula
Explanations:
The septomarginal trabecula conveys the atrioventricular bundle.
It is a thickening of the right ventricle running from the intraventricular
septum to the anterior papillary muscle.
It is the border between the trabeculated inflow tract and the smooth
outflow tract.
The septal attachment can connect with the supraventricular crest.
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Research Concepts:
Heart Anatomy:
Choices:
1. Take a pulse
2. Take a blood pressure
3. Assess a surgical site
4. Record output
Answer: 3 - Assess a surgical site
Explanations:
A surgical site must be assessed by a licensed member of the health care
team.
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Research Concepts:
Licensing:
Choices:
1. Fifteen days
2. Ten days
3. Three days
4. One day
Answer: 2 - Ten days
Explanations:
Patients are advised to stop NSAID three days before surgery.
Patients are advised to stop aspirin ten days before surgery.
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Research Concepts:
Preoperative Evaluation And Management:
Aspirin:
Choices:
1. Diabetes
2. Renal failure
3. Hyperkalemia
4. Hyperthyroidism
Answer: 4 - Hyperthyroidism
Explanations:
Hyperthyroidism always increases the risk of precipitating atrial fibrillation.
While most patients with atrial fibrillation are investigated for
hyperthyroidism, less than 3% are actually diagnosed with the disorder.
In many cases, if the atrial fibrillation has been going on for more than 12
months, it does not reverse even with normalization of thyroid hormone.
Most patients, however, do benefit from use of beta-blockers.
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Research Concepts:
Hyperthyroidism:
Atrial Fibrillation:
Choices:
1. Atropine sulfate
2. Adenosine
3. Lidocaine 2 mg po
4. Lidocaine 2 mg/min by continuous infusion
Answer: 4 - Lidocaine 2 mg/min by continuous infusion
Explanations:
Lidocaine 2 mg/min by continuous infusion should be started. Lidocaine
hydrochloride is an anti-arrhythmic medication whose impact on ventricular
arrhythmias is due to its suppression of automaticity (automatic action) and
excitability of the myocardium.
It may be given as a loading dose bolus, then by continuous infusion.
Atropine sulfate is used to treat bradyarrhythmias. Adenosine is used to
treat supraventricular tachyarrhythmias.
Lidocaine is not given in pill form.
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Research Concepts:
Myocardial Infarction:
Choices:
1. Propoxyphene
2. Pentazocine
3. Nalbuphine
4. Methadone
Answer: 4 - Methadone
Explanations:
Methadone is a prescription drug that is a full agonist of opioid receptors
It has a long half-life, making it a suitable substitute for heroin
Pentazocine and nalbuphine are partial agonists of opioid
Propoxyphene is a weak full agonist
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Research Concepts:
Methadone:
Choices:
1. Mitral stenosis
2. Aortic stenosis
3. Tricuspid regurgitation
4. Pulmonic regurgitation
Answer: 2 - Aortic stenosis
Explanations:
Aortic valve disease is the most common valvular disease in the elderly.
Calcification and thickening of the aortic valve occurs with age.
Aortic sclerosis is a common phenomenon with aging but does not cause
significant obstruction.
About 9% of the geriatric population suffers from hemodynamically
significant aortic stenosis.
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Research Concepts:
Aortic Stenosis:
Choices:
1. Most severe progression occurs proximal to site of anastomosis in a grafted
vessel
2. Most severe progression occurs distal to site of anastomosis in a grafted
vessel
3. Most severe progression occurs in the grafted vessel
4. Most severe progression occurs in the proximal part of the grafted vessel
Answer: 1 - Most severe progression occurs proximal to site of anastomosis
in a grafted vessel
Explanations:
Vein graft atherosclerosis progresses faster than native coronary artery
disease.
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Research Concepts:
Saphenous Vein Grafts:
Choices:
1. Increase cardiac output
2. Increase vascular tone
3. Decrease hypoxemia
4. Decrease lower extremity edema
Answer: 1 - Increase cardiac output
Explanations:
Increasing cardiac output is the main goal of therapy for patients with heart
failure
Correction of hypoxemia from pulmonary edema and lower extremity
edema will occur as cardiac output is increased
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Research Concepts:
Heart Failure:
Cardiac Output:
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Research Concepts:
Vasoconstrictor Medication:
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Research Concepts:
Efficacy:
Drug Potency:
Choices:
1. Carotid surgery first followed by triple vessel bypass in same setting
2. Stage surgery with carotid first followed by the CABG later
3. Stage surgery with CABG first followed by carotid later
4. Stent coronary lesions and do carotid only
Answer: 1 - Carotid surgery first followed by triple vessel bypass in same
setting
Explanations:
If there is critical stenosis in both the carotid artery and the coronary
vessels, it is best to approach both these lesions in the same setting.
The carotid should be done first, the neck left open and then the CABG is
done next. After protamine is given the neck wound is closed.
One can also open the chest, put the sutures in for cannulation and then
proceed with the carotid. If the patient decompensates, the patient is ready
for bypass.
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Research Concepts:
Coronary Artery Bypass Graft:
Choices:
1. Main pulmonary bifurcation
2. Junction of middle and inferior pulmonary veins on the right
3. Right interlobar artery
4. Azygous arch
Answer: 1 - Main pulmonary bifurcation
Explanations:
The main pulmonary arterial bifurcation into right and left main branches is
within the pericardium
The other listed structures are extrapericardial in location
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Research Concepts:
Heart Anatomy:
Choices:
1. Decreased diastolic filling, decreased venous return, RV collapse
2. ECG with decreased voltage, electrical alternans
3. Chest pain, dyspnea, syncope, shock
4. Decreased breath sounds on left
Answer: 4 - Decreased breath sounds on left
Explanations:
Decreased breath sounds on left would be suggestive of pneumothorax or a
R mainstem bronchus intubation
All the others, including CXR with "water bottle" heart, suggest tamponade
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Research Concepts:
Cardiac Tamponade:
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Research Concepts:
Toxic, Cocaine:
Chemotherapy:
Marijuana:
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Question 259: Internal cardiac defibrillators are implanted on:
Choices:
1. Midsternum
2. Right chest
3. Left chest
4. Any of the above
Answer: 3 - Left chest
Explanations:
Most ICD pulse generators are implanted on the left side of the chest
Left side requires lower energy
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Research Concepts:
Pacemaker, Automatic Internal Cardiac Defibrillator:
Choices:
1. Left bundle branch block
2. Supraventricular tachycardia
3. Sinus tachycardia
4. Accelerated junctional rhythm
Answer: 3 - Sinus tachycardia
Explanations:
A common EKG finding in patients diagnosed with pulmonary embolus is
sinus tachycardia.
The classic EKG finding is S Wave in Lead I, Q Wave in Lead III, and T
Wave Inversion in Lead III (S1 Q3 T3, seen in under 20%)
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Research Concepts:
Electrocardiogram:
Pulmonary Embolism:
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Research Concepts:
Supraventricular Tachycardia:
Choices:
1. Levels of thyroid hormone
2. INR
3. Echocardiogram
4. Coronary angiogram
Answer: 3 - Echocardiogram
Explanations:
When a patient has long standing atrial flutter, blood clots are common in
the ventricles.
As soon as the patient is cardioverted, these blood clots can embolize to the
brain.
Thus, all patients need an echocardiogram prior to cardioversion to ensure
that there are no blood clots.
Echo can also provide information on heart function and structural
abnormalities.
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Research Concepts:
Atrial Flutter:
Choices:
1. Alpha blockers
2. Calcium channel blockers
3. Diuretics
4. ACE inhibitors
Answer: 4 - ACE inhibitors
Explanations:
ACE inhibitors have been shown to reduce mortality and morbidity in
congestive heart failure.
ACE inhibitors reduce aldosterone secretion, salt and water retention, and
afterload.
ACE inhibitors are now considered first line drugs for congestive heart
failure.
Beta blockers also decrease mortality but are not used during acute
exacerbations.
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Research Concepts:
Heart Failure, Congestive:
Choices:
1. Aortic valve replacement now
2. Echocardiography every 6 months
3. Start a beta blocker
4. Start an ACE inhibitor
Answer: 2 - Echocardiography every 6 months
Explanations:
Medical therapy is not indicated in a patient with preserved LV function
Close follow up with echocardiography and identification of syncope,
angina, or CHF is indicated
The patient has a 40% probability of needing aortic valve replacement over
the next 5 years
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Research Concepts:
Aortic Stenosis:
Choices:
1. To increase cardiac output
2. To increase peripheral vascular resistance
3. To decrease hypertension
4. All of the above
Answer: 1 - To increase cardiac output
Explanations:
Adrenergics increase cardiac output while decreasing peripheral vascular
resistance
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Research Concepts:
Shock:
Adrenergic Drugs:
Choices:
1. Lisinopril
2. Furosemide
3. Metoprolol
4. Spironolactone
Answer: 2 - Furosemide
Explanations:
ACE inhibitors and beta blockers have well demonstrated mortality
reduction benefits
Spironolactone is unique among diuretics in having mortality benefit
whereas loop diuretics, though useful for fluid management does not have
demonstrated mortality benefit
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Research Concepts:
Heart Failure, Congestive:
Choices:
1. Compression TED stockings
2. Early ambulation after surgery
3. Subcutaneous unfractionated heparin
4. Aspirin therapy
Answer: 4 - Aspirin therapy
Explanations:
Low dose subcutaneous unfractionated heparin (UFH)is commonly used for
prophylaxis of venous thromboembolism
Compression stockings are used in elderly patient who have a risk of DVT
but cannot use anticoagulants due to various reasons
Aspirin cannot prevent or reduce DVT
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Research Concepts:
Deep Venous Thrombosis Prophylaxis:
Choices:
1. CO2 is transported as bicarbonate in red cells
2. CO2 is transported as carbaminohemoglobin
3. CO2 is transported as bicarbonate in serum
4. CO2 is transported as CO2 in physical solution
Answer: 3 - CO2 is transported as bicarbonate in serum
Explanations:
Intracellular conversion of CO2 to bicarbonate and hydrogen ion is
catalyzed by carbonic anhydrase, which is found in red blood cells and
other blood cells.
The bicarbonate is exchanged for chloride ion.
Only 5% of CO2 is carried in solution.
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Research Concepts:
Hematological CO2 Transport:
Exercise Physiology:
Choices:
1. Inhibition of sodium influx
2. Inhibition of l type calcium channels
3. Reduction of the outward phase of the potassium current
4. Inhibition of Na/K ATPase
Answer: 3 - Reduction of the outward phase of the potassium current
Explanations:
The hallmark of class 3 drugs is prolongation of the action potential
duration.
The action potential prolongation by class 3 antiarrhythmic drugs is caused
by blockade of the potassium channels that are responsible for the
repolarization of the action potential.
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Research Concepts:
Antiarrhythmic Medication:
Choices:
1. Furosemide
2. Diltiazem
3. Lisinopril
4. Hydralazine
Answer: 3 - Lisinopril
Explanations:
All ACE Inhibitors have a tendency to cause hyperkalemia.
Patients who take ACE inhibitors should be regularly monitored for their
potassium levels.
Their use in the presence of renal artery stenosis is contraindicated.
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Research Concepts:
Angiotensin Converting Enzyme Inhibitors (ACEI):
Choices:
1. Penicillin V
2. Ceftriaxone
3. Vancomycin
4. Gentamycin
Answer: 3 - Vancomycin
Explanations:
Vancomycin is a glycopeptide that is a bactericidal by inhibiting proper
synthesis of cell wall
Vancomycin is effective against MRSA and antibiotic induced colitis
It requires dose reduction with renal impairment.Toxicity includes
ototoxicity and hypersensitivity reactions
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Research Concepts:
Methicillin Resistant Staphylococcus Aureus (MRSA):
Vancomycin:
Choices:
1. Increased cardiac contractility
2. Tachycardia
3. Inhibition of the sodium pump
4. Nausea and vomiting
Answer: 2 - Tachycardia
Explanations:
Digoxin has inotropic properties but also blocks atrioventricular node
conduction
The treatment of toxicity involves the use of antibodies or dialysis
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Research Concepts:
Digoxin:
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Research Concepts:
Volume of Distribution:
Choices:
1. Potassium
2. Calcium channel blocker
3. Nitroglycerin
4. Lisinopril
Answer: 4 - Lisinopril
Explanations:
CHF is treated with diuretics, ACE inhibitors, beta-blockers, and sometimes
digoxin.
The most common diuretics used to treat CHF are loop diuretics.
ACE inhibitors not only reduce symptoms but also prolong life. These
drugs reduce levels of angiotensin 2 and aldosterone.
Diuretics and digoxin are the oldest treatments for CHF.
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Research Concepts:
Heart Failure, Congestive:
Choices:
1. Hypertrophic cardiomyopathy
2. Prolonged QT syndrome
3. Dilated cardiomyopathy
4. Ventricular septal defect
Answer: 1 - Hypertrophic cardiomyopathy
Explanations:
Hypertrophic cardiomyopathy is commonly inherited as a autosomal
dominant fashion
Prolonger QT syndrome is transmitted both as autosomal dominant or
recessive patterns
Dilated cardiomyopathy is usually caused by infections
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Research Concepts:
Cardiomyopathy, Hypertrophic:
Choices:
1. Calculate calorie intake necessary following surgery
2. Switch to parenteral short acting insulin before surgery
3. Measure blood sugar level daily
4. Keep NPO
Answer: 2 - Switch to parenteral short acting insulin before surgery
Explanations:
Surgery is stressful and leads to insulin resistance and high glucose levels
Diabetic patients need parenteral insulin perioperatively.
Blood sugar should be measured perioperatively.
All patients should be kept NPO before major surgery
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Research Concepts:
Diabetes Mellitus:
Choices:
1. Intramuscular
2. Oral
3. Subcutaneous
4. Rectal
Answer: 1 - Intramuscular
Explanations:
Intramuscular epinephrine is recommended for anaphylaxis
Absorption of subcutaneous epinephrine is variable in patients with
anaphylaxis
It can be give intravenously but administration should not wait for starting
an IV
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Research Concepts:
Anaphylaxis:
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Research Concepts:
Pacemaker, Cardiac:
Postoperative Infection:
Choices:
1. It is crescendo-decrescendo in nature
2. Is best heard in the axilla
3. Intensity varies with inspiration
4. Is always systolic in nature
Answer: 3 - Intensity varies with inspiration
Explanations:
Tricuspid stenosis can cause an opening snap.
It is a diastolic murmur that varies in intensity with inspiration.
If there is tricuspid regurgitation, as well, the murmur is holosystolic.
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Research Concepts:
Tricuspid Stenosis:
Choices:
1. Intrapericardial epinephrine
2. Synchronized cardioversion
3. Unsynchronized defibrillation
4. Insertion of an automatic implanted cardioverter-defibrillator (AICD).
Answer: 3 - Unsynchronized defibrillation
Explanations:
Defibrillation differs in that the shock is not synchronized.
Defibrillation is essential when the rhythm is chaotic and is widely used for
pulseless ventricular tachycardia.
In ventricular fibrillations, patients are generally unconscious and sedation
is not required.
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Research Concepts:
Ventricular Fibrillation:
Choices:
1. 0.01 mm Hg/mL/min
2. 0.02 mm Hg/mL/min
3. 0.04 mm Hg/mL/min
4. 0.08 mm Hg/mL/min
Answer: 3 - 0.04 mm Hg/mL/min
Explanations:
TPR = 120/3000 = 0.04 mm Hg/mL/min.
Pressure = (flow) x (resistance).
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Research Concepts:
Cardiac Physiology:
Choices:
1. Respiratory compromise
2. Sedation
3. Nausea and/or vomiting
4. Itching
Answer: 4 - Itching
Explanations:
Itching occurs much more frequently with neuraxial opioids. Itching occurs
in up to 90% of patients with neuraxial opioids. Itching occurs in 15-20% of
patients with intravenous opioids.
The proposed mechanism includes stimulation of an "itch center" in the
medulla or stimulation of opioid receptors in the trigeminal nucleus.
Sedation, nausea and/or vomiting, and respiratory compromise have
approximately the same incidences for both neuraxial and intravenous
opioids.
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Research Concepts:
Opioids:
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Research Concepts:
Multivessel Disease:
Choices:
1. Signs and symptoms of congestive heart failure
2. Low likelihood of death from MI
3. Noninvasive testing reveals intermediate-risk
4. An occupational requirement for a definitive diagnosis
Answer: 1 - Signs and symptoms of congestive heart failure
Explanations:
Disabling chronic stable angina despite medical therapy is an indication for
angiography
High-risk criteria on noninvasive testing is another
Patients who have survived sudden cardiac death or have sustained (>30 s)
monomorphic or nonsustained (<30 s) polymorphic ventricular tachycardia
Occupational requirements for a definitive diagnosis are not a compelling
reason
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Research Concepts:
Angina, Stable:
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Research Concepts:
Angina, Unstable:
Choices:
1. Neuromuscular relaxation
2. Muscle rigidity
3. Metabolic acidosis
4. Jaw clenching
Answer: 4 - Jaw clenching
Explanations:
Trismus is usually the first sign of malignant hyperthermia
A contracture of the chewing musculature of the jaw is a possible early
sign.
Malignant hyperthermia is myopathy that allows large quantities of calcium
to be released from the skeletal muscle sarcoplasmic reticulum.
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Research Concepts:
Malignant Hyperthermia:
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Research Concepts:
Angina, Stable:
Choices:
1. Color
2. Keloids do not remain confined to the boundary of the wound
3. Hypertrophic scars are painful
4. Only keloids can be treated with surgery
Answer: 2 - Keloids do not remain confined to the boundary of the wound
Explanations:
Keloids are scars that tend to overgrow.
Unlike a hypertrophic scar, keloids do grow beyond the boundaries of the
original wound.
Both keloids and hypertrophic scars are a result of trauma or surgery.
Both keloids and hypertrophic scars are benign fibrotic tumors that are very
difficult to treat. African Americans and Asians tend to have a propensity to
form keloids.
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Research Concepts:
Hypertrophic Scarring:
Keloids:
Choices:
1. Chest MRI for confirmation of the aneurysm, and, if confirmed, immediate
surgical consultation
2. Follow up echocardiogram in 6 weeks
3. Holter monitor
4. Referral for outpatient cardiothoracic surgery consultation
Answer: 1 - Chest MRI for confirmation of the aneurysm, and, if confirmed,
immediate surgical consultation
Explanations:
Sinus of valsalva aneurysms can cause compression of adjacent coronary
arteries resulting in myocardial ischemia and infarction.
Aneurysms should be confirmed with cardiac MRI.
Urgent surgical intervention is generally warranted if the aneurysm is
confirmed.
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Research Concepts:
Sinus Of Valsalva Aneurysm:
Choices:
1. Branched amino acids
2. Ketones
3. Glycogen
4. Fats
Answer: 3 - Glycogen
Explanations:
Glycogen is primarily made in the liver, muscles, and to some extent, in the
brain.
Glycogen forms as an energy reserve and is quickly mobilized to meet the
sudden need for glucose.
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Research Concepts:
Postoperative Care:
Alcoholism:
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Research Concepts:
Dietary Sodium:
Choices:
1. Unsynchronized cardioversion with 150 joules
2. Synchronized cardioversion with 100 joules
3. Unsynchronized cardioversion with 25 joules
4. Synchronized cardioversion with 50 joules
Answer: 4 - Synchronized cardioversion with 50 joules
Explanations:
The patient is suffering from unstable supraventricular tachycardia
The first step in management would be synchronized cardioversion with 50
joules
In stable younger patients, vagal maneuvers can be helpful
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Research Concepts:
Paroxysmal Supraventricular Tachycardia:
Choices:
1. Lowering of blood pressure
2. Decreasing lipids
3. Controlling blood sugar
4. Decreasing weight
Answer: 2 - Decreasing lipids
Explanations:
Decreasing LDL is said to be of the greatest benefit when it comes to
lowering risk of heart attacks.
All the other factors do help, but lipid reduction is the key.
Thus, patients should be encouraged to change diet and enter an exercise
program.
An HMG CoA reductase inhibitor can help reduce cardiac events and
mortality.
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Research Concepts:
Coronary Artery Disease:
Choices:
1. The incidence of prosthetic valve endocarditis (PVE) is greater in the aortic
position than in the mitral position
2. Native valve endocarditis is more common in the mitral position than in the
aortic position
3. Ring abscess in PVE render antibiotic sterilization difficult
4. Fungal PVE can be treated with aggressive antibiotics
Answer: 4 - Fungal PVE can be treated with aggressive antibiotics
Explanations:
There appears to be no difference in risk of developing PVE between the
use of heterograft or mechanical valves
A significant finding that is universally reported is a greater risk of
developing PVE at the aortic site than at the mitral site, which is opposite to
the situation in native valve endocarditis
The pathologic focus of PVE is most often at the valve seat. Abscess
formation and destruction of tissue are hallmark and often involve the entire
circumference of the valve seat
Valve replacement in addition to antibiotic therapy is recommended for
both early and late PVE with any of the following conditions: by a non-
streptococcal organism, paravalvular leak, CHF, systemic emboli or
recurrence of medically treated infection
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Research Concepts:
Prosthetic Heart Valves:
Choices:
1. Decrease afterload (reduce systolic blood pressure)
2. Thin the blood
3. Reduce the heart rate
4. Increase myocardial contractility
Answer: 1 - Decrease afterload (reduce systolic blood pressure)
Explanations:
ACE-Inhibitors reduce systolic blood pressure and after load
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Research Concepts:
Heart Failure:
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Research Concepts:
Hyertrophic Cardiomyopathy:
Choices:
1. VSD
2. ASD
3. Tetralogy of Fallot
4. Patent ductus arteriosus
Answer: 3 - Tetralogy of Fallot
Explanations:
Brain abscess is more common in congenital heart diseases with right to left
shunts
Of the above choices TOF is the only one with right to left shunting
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Research Concepts:
Tetralogy Of Fallot:
Brain Abscess:
Choices:
1. Duplex ultrasound
2. Impedance plethysmography
3. Venogram
4. CT
Answer: 3 - Venogram
Explanations:
Impedance plethysmography and duplex ultrasound are most commonly
used for diagnosis of deep venous thrombosis but venogram is still the gold
standard (as of 2012 analysis).
This is an area that is evolving. In particular keep in mind that contrast
venography is operator-dependent. As the exam is performed less and less
frequently, exam quality may suffer.
Keep in mind when analyzing the literature that by definition no study can
be better than the declared gold standard, simply because when any study
disagrees with the gold standard it is viewed as a false positive rather than
viewing the gold standard result as a false negative.
While a decade ago many centers felt venous LE compression Doppler US
need only study, or was technically only capable of studying, the popliteal
and thigh regions, the current US standard, capable of achievement in most
labs, is to study the entire lower extremity including all calf veins.
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Research Concepts:
Deep Vein Thrombosis:
Choices:
1. Large Q wave in lead III
2. Inverted T wave in lead III
3. Right axis deviation
4. S wave in lead I, Q wave in lead III, and T wave inversion in lead III
Answer: 4 - S wave in lead I, Q wave in lead III, and T wave inversion in
lead III
Explanations:
All of the choices can be seen in pulmonary embolism
The classic S1, Q3, T3 is only seen in less than 20% of cases
Other findings are right bundle branch block and sinus tachycardia
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Research Concepts:
Pulmonary Embolism:
Choices:
1. ECMO
2. Supraventricular arrhythmias
3. Bridge to transplant
4. Septic shock
Answer: 2 - Supraventricular arrhythmias
Explanations:
IABP can be used for all except supraventricular arrhythmias
It can, however, be used to treat ventricular arrhythmias
Contraindications include aortic insufficiency, aortic dissection and severe
peripheral vascular disease
If severe PVD is encountered, the IABP can be inserted in to the ascending
aorta
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Research Concepts:
Intra-Aortic Balloon Pump:
Choices:
1. Metoprolol
2. Reserpine
3. Labetalol
4. Prazosin
Answer: 3 - Labetalol
Explanations:
Labetalol is a reversible beta-blocker with concurrent alpha blocking
actions that produces vasodilatation and decreases blood pressure.
Labetalol is an excellent agent for treating the elderly or black hypertensive
patients.
Labetalol does not alter serum lipid or blood glucose levels.
Labetalol is used as an alternative to hydralazine in the treatment of pre-
eclampsia (pregnancy-induced hypertension).
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Research Concepts:
Labetalol:
Choices:
1. The AV node
2. The SA node
3. The bundle of His
4. The atria
Answer: 2 - The SA node
Explanations:
The unipolar pacemaker initiates the heartbeat that is the normal function of
the sino-atrial node
A dual chamber pacemaker first stimulates the atria then the ventricles and
may be more appropriate for those with sick sinus syndrome and AV blocks
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Research Concepts:
SA Node:
Pacemaker, Cardiac:
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Research Concepts:
Epinephrine:
Choices:
1. Peaked, tall P waves in II
2. S1 Q3 T3 pattern
3. Atrial fibrillation
4. Sinus tachycardia
Answer: 4 - Sinus tachycardia
Explanations:
There are many findings seen with pulmonary embolism unfortunately the
classic findings are only seen in about 20% of patients
Right hear strain, right axis deviation, right bundle branch block, and the
above findings can all occur
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Research Concepts:
Pulmonary Embolism:
Electrocardiogram:
Choices:
1. Stroke
2. Arrhythmias
3. Renal failure
4. Coagulopathy
Answer: 2 - Arrhythmias
Explanations:
Hypothermia treatment should begin during transport to the hospital. Wet
clothes should be removed and the patient should be placed in a warm
environment with passive rewarming.
Ventricular fibrillation or tachycardia should be treated with defibrillation
one time. If this is unsuccessful, the patient should be rewarmed before
repeat attempts. Automated external defibrillator (AED) defibrillation is
appropriate.
Rapid fluid resuscitation is often needed, as cardiovascular efficiency
benefits from crystalloid administration.
Survival is not improved by barbiturates, steroids, or antibiotics.
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Research Concepts:
Hypothermia:
Choices:
1. Hydrochlorothiazide
2. Metolazone
3. Acetazolamide
4. Furosemide
Answer: 4 - Furosemide
Explanations:
Furosemide is a potent diuretic that is preferred for use in pulmonary
edema.
Hydrochlorothiazide is preferred as a diuretic for use in mild hypertension.
Acetazolamide is used in glaucoma.
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Research Concepts:
Congestive Heart Failure And Pulmonary Edema:
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Research Concepts:
Shock, Distributive:
Choices:
1. VSD
2. ASD
3. Tetralogy of Fallot
4. PDA
Answer: 3 - Tetralogy of Fallot
Explanations:
Tetralogy of fallot is the most common congenital cyanotic heart disease
The chronic hypoxia often causes very high polycythemia and leukocytosis
It is often necessary to perform a therapeutic phlebotomy in such children
to reduce the hematocrit level
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Research Concepts:
Polycythemia:
Tetralogy Of Fallot:
Choices:
1. Coronary arteries
2. Ascending aorta
3. Thoracic aorta
4. Abdominal aorta
Answer: 4 - Abdominal aorta
Explanations:
The abdominal aorta is the most common site for atherosclerotic
aneurysms.
Of these, 90 to 95% are below the renal arteries. A large percentage extends
into the common iliac arteries.
The USPSTF recommends a single screening for AAA by ultrasound for
male non-smokers, 65 to75 years of age.
AAA is commonly noted incidentally on CT/US/MR abdominal studies
performed for other reasons. Any such incidental finding should be reported
and measurements provided.
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Research Concepts:
Abdominal Aortic Aneurysm:
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Research Concepts:
Myocardial Oxygen Demand:
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Research Concepts:
Coronary Artery Disease:
Choices:
1. Respiratory rate 30/min
2. PaCo2= 50 mm Hg
3. Vd/Vt=0.6
4. Vital capacity = 8 ml/kg
Answer: 2 - PaCo2= 50 mm Hg
Explanations:
All the parameters are borderline for intubation but CO2 retention is the
most serious
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Research Concepts:
Intubation, Indications:
Choices:
1. Sodium bicarbonate
2. Potassium
3. Calcium
4. Citrate
Answer: 3 - Calcium
Explanations:
Non-immune related complications of blood transfusions include
hypocalcemia, hyperkalemia, and hemoglobinuria.
The hypocalcemia is due to the citrate. Hypocalcemia is most commonly
seen in trauma patients who require blood transfusions.
Only symptomatic patients need to be treated with intravenous calcium.
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Research Concepts:
Blood Transfusion:
Hypocalcemia:
Choices:
1. Niacin
2. Simvastatin
3. Clofibrate
4. Acarbose
Answer: 2 - Simvastatin
Explanations:
HMG-CoA reductase inhibitors can decrease levels of LDL by inhibiting
cholesterol synthesis
This leads to feedback up regulation of LDL receptors in the liver
The increased LDL receptors help to remove LDL from the circulation
Niacin mainly acts on liver synthesis of VLDL and LDL; it does not up
regulate LDL receptors
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Statin Medication:
Choices:
1. Acebutolol
2. Terazosin
3. Propranolol
4. Phenoxybenzamine
Answer: 3 - Propranolol
Explanations:
Non-selective beta-blockers such as propranolol can cause bronchospasm
that can be life threatening to an asthmatic
Terazosin is used to treat hypertension and BPH due to the fact that it is an
alpha-adrenergic receptor antagonist
Acebutolol is a beta agonist with intrinsic sympathomimetics activity that
can be used in asthma
Phenoxybenzamine is used to treat pheochromocytoma, as it is a
nonselective alpha-blocker
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Research Concepts:
Asthma:
Beta-Blockers:
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Research Concepts:
Local Anesthetics:
Choices:
1. 10%
2. 25%
3. 55%
4. 100%
Answer: 3 - 55%
Explanations:
The two handed technique of CPR can markedly improve heart function
It is nearly 3 times more effective than the one handed CPR technique
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Open Heart Massage:
Choices:
1. Gout
2. Type 2 Diabetes mellitus
3. Hyperlipidemia
4. Chronic pancreatitis
Answer: 3 - Hyperlipidemia
Explanations:
HMG-CoA reductase inhibitors are termed statins and are used to treat
hypercholesterolemia.
The statins available for use in the United States are simvastatin,
pravastatin, lovastatin, atorvastatin, fluvastatin, rosuvastatin, and
pitavastatin.
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Research Concepts:
Statin Medication:
Hyperlipidemia:
Explanations:
May cause life-threatening hyperkalemia due to potassium-sparing effects,
impotence, gynecomastia
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Spironolactone:
Choices:
1. Pneumothorax
2. Cardiac tamponade
3. Hypervolemia
4. Myocardial infarction
Answer: 3 - Hypervolemia
Explanations:
The common causes of PEA is summarized in the 7 H's and 6 T's
Hypovolemia, hyperkalemia, hypokalemia, hypothermia, hypoglycemia,
hypoxia, and hydrogen ions (acidosis)
Tamponade, toxins, tension pneumothorax, trauma (causing hypovolemia),
tachycardia, thrombosis (PE or MI),
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Research Concepts:
Pulseless Electrical Activity:
Explanations:
If any vessel arises after the posterior descending artery takes off and
supplies the AV nodal artery, the system is right-dominant.
It is important to understand the branches of the right coronary artery. The
conus is the first branch of the right coronary artery. It may come off a
separate coronary ostia in the right sinus, cross the right ventricular outflow
tract anteriorly, and run to the pulmonic valve.
It is an important collateral to the left anterior descending artery. The sinus
node artery runs the opposite way to the conus and supplies the SA node in
about 60% of patients.
In the rest, the sinus node artery may come off the distal circumflex. The
next artery to come off the right coronary is the acute marginal artery,
which is visible anteriorly.
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Research Concepts:
Coronary Artery Imaging:
Choices:
1. Loud murmur
2. Murmur that radiates to the axilla
3. Presence of thrill
4. Presence of apical heave
Answer: 1 - Loud murmur
Explanations:
Small VSDs usually cause a louder blowing type of murmur than large
VSDs
The other features may be present with any kind of VSDs
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Ventricular Septal Defect:
Choices:
1. Edema
2. Hypoglycemia
3. Flushing
4. Tinnitus
Answer: 3 - Flushing
Explanations:
Flushing is the most common side effect associated with niacin and leads to
noncompliance with the medication amongst patients.
This can be reduced by pretreating with aspirin.
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Niacin:
Niacin:
Choices:
1. Persistent atrial fibrillation
2. Paroxysmal
3. Sustained
4. Recurrent
Answer: 2 - Paroxysmal
Explanations:
When atrial fibrillation recurs 2 or more times, it is termed recurrent.
When atrial fibrillation spontaneously stops, this is paroxysmal.
If the fibrillation is sustained, this is persistent.
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Atrial Fibrillation:
Choices:
1. Jugular venous distention
2. Hypotension
3. Decreased heart sounds
4. Pulmonary hypertension
Answer: 4 - Pulmonary hypertension
Explanations:
Beck triad of cardiac tamponade includes jugular venous distention,
hypotension, and muffled heart sounds
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Research Concepts:
Cardiac Tamponade:
Choices:
1. Rifampin
2. Omeprazole
3. Famotidine
4. Vitamin K
Answer: 2 - Omeprazole
Explanations:
Omeprazole inhibits the cytochrome P-450 system there by increasing
warfarin levels
Warfarin levels might be dangerously elevated with potent liver enzyme
inhibitors so INR must be monitored or alternate medication used
Vitamin K reverses the effect of warfarin
Rifampin is a potent liver enzyme inducer
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Research Concepts:
Warfarin, Drug Interactions:
Omeprazole:
Choices:
1. Tuberculosis
2. Acute respiratory distress syndrome
3. Pulmonary hypertension
4. Congestive heart failure
Answer: 3 - Pulmonary hypertension
Explanations:
Patients who have pulmonary hypertension are prone to pulmonary artery
rupture.
A pulmonary artery catheter should usually not be used in patients with
sustained pulmonary artery hypertension.
When a pulmonary artery rupture occurs, death is inevitable.
If the diagnoses is suspected, one may be able to tamponade the bleeding
with the balloon catheter until the surgeon can safely take the patient to the
operating room.
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Research Concepts:
Hemoptysis:
Swan-Ganz Catheterization:
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Research Concepts:
Allograft:
Choices:
1. 5000 U q8h
2. 5000 U q4h
3. 5000 U q24h
4. 500 U q6h
Answer: 1 - 5000 U q8h
Explanations:
Deep vein thromboses are very prevalent after major surgery, especially
pelvic and lower limb surgeries.
Heparin is often administered at a dose of 5000 U q8h before surgery and
continued until the patient is ambulatory.
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Research Concepts:
Deep Venous Thrombosis Prophylaxis:
Choices:
1. Myocardial infarction (MI)
2. Pulmonary embolism (PE)
3. Sudden death
4. COPD
Answer: 3 - Sudden death
Explanations:
VT is associated with an increased risk of sudden death.
Stable VT should be treated with intravenous procainamide or sotalol.
Lidocaine is often used especially if there is known impairment of left
ventricular function.
VT is usually a consequence of ischemic or structural heart disease or
electrolyte deficiencies.
Unstable patients with monomorphic VT should be treated with
synchronized direct current cardioversion.
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Research Concepts:
Ventricular Tachycardia:
Choices:
1. Bicuspid valve
2. Rheumatic fever
3. Degenerative valve disease
4. Endocarditis
Answer: 3 - Degenerative valve disease
Explanations:
Degenerative valve disease is the most common cause of aortic stenosis in
the elderly
Bicuspid aortic valve is a more common cause of AS in middle-aged
individuals
Both rheumatic valve disease and endocarditis produce aortic regurgitation
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Research Concepts:
Aortic Stenosis:
Aortic Stenosis:
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Research Concepts:
Angina, Prinzmetal:
Choices:
1. Acute heart failure
2. Syncope
3. Chest pain
4. Discovered incidentally
Answer: 4 - Discovered incidentally
Explanations:
In the majority of patients, coronary artery disease is discovered while
being worked up for another medical disorder.
Many individuals do have CAD but have no idea because they are
asymptomatic.
The process of atherosclerosis begins in the second or third decade of life
and progresses slowly.
Only 10-20% of patients with CAD presents acutely with chest pain and
other symptoms.
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Research Concepts:
Coronary Artery Disease:
Choices:
1. Potassium supplements
2. Vasotec
3. Vitamin D
4. Quinidine
Answer: 4 - Quinidine
Explanations:
Quinidine is known to enhance the toxicity of digoxin by displacing
digoxin from the protein binding sites.
Quinidine is rarely used today primarily because of the availability of safer
drugs.
Quinidine is a class 1 anti-arrhythmic agent and works by blocking the fast
sodium current.
Quinidine toxicity can lead to thrombocytopenia, tinnitus, and torsades.
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Research Concepts:
Antiarrhythmic Medication:
Digoxin:
Choices:
1. Coxsackie virus infection
2. Sepsis
3. Myocardial infarction
4. Tuberculosis
Answer: 2 - Sepsis
Explanations:
Sepsis can occasionally be a cause of purulent pericarditis.
Bacterial pericarditis usually results from pulmonary extension,
hematogenous spread, myocardial abscess, or endocarditis.
The organisms typically responsible for purulent pericarditis include strep,
staph, and gram-negative organisms.
Even when treated, many individuals develop constrictive pericarditis.
Surgery may be required to remove the thickened, fibrosed pericardium.
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Research Concepts:
Pericarditis, Bacterial:
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Research Concepts:
Deep Venous Thrombosis, Lower Extremity:
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Pericarditis, Acute:
Choices:
1. Morphine
2. Prochlorperazine
3. Imipramine
4. Apomorphine
Answer: 2 - Prochlorperazine
Explanations:
Prochlorperazine blocks dopamine receptors and is indicated to treat nausea
and vomiting associated with surgery, chemotherapy, radiation, and other
conditions.
It is also indicated to treat psychosis.
Off label, it is used to treat migraines.
At low doses, about 2% of patients experience extrapyramidal side effects
but at high doses, it can be as much as 40%.
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Research Concepts:
Prochlorperazine:
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Research Concepts:
Imipenem Cilastatin Combination:
Choices:
1. Showering
2. Driving
3. Sleeping on their chest
4. Lifting anything greater than 10 pounds
Answer: 4 - Lifting anything greater than 10 pounds
Explanations:
Most cardiac surgical patients have had median sternotomies, making
avoidance of heavy lifting imperative in the post operative period
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Research Concepts:
Cardiac Surgery:
Choices:
1. Right ventricular hypertrophy and dextroposition of the aorta
2. Left ventricular hypertrophy and dextroposition of the aorta
3. Right ventricular hypertrophy and anomalous right coronary artery origin
4. Left ventricular hypertrophy and anomalous right coronary artery origin
Answer: 1 - Right ventricular hypertrophy and dextroposition of the aorta
Explanations:
The other components of the TOF include aortic overriding and right
ventricular hypertrophy.
In rare cases an atrial septal defect is present. This is called the pentad of
tetralogy.
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Research Concepts:
Tetralogy Of Fallot:
Choices:
1. Flumazenil
2. Naloxone
3. Activated charcoal
4. Dopamine
Answer: 1 - Flumazenil
Explanations:
Flumazenil (Romazicon) is used to reverse effects of benzodiazepines
Flumazenil used with other medications may induce seizure
Naloxone is used for opioid overdose.
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Research Concepts:
Toxic, Benzodiazepine:
Flumazenil:
Choices:
1. Neurogenic
2. Septic
3. Cardiogenic
4. Hypovolemic
Answer: 3 - Cardiogenic
Explanations:
Acute myocardial infarction can result in cardiogenic shock
Prolonged diarrhea or vomiting can result in hypovolemic shock
Systemic infections can result in septic shock
Vasovagal reactions and general anesthesia can result in neurogenic shock
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Research Concepts:
Cardiogenic Shock:
Choices:
1. CT scan
2. Upper endoscopy
3. Transesophageal ultrasound
4. Nerve conduction studies
Answer: 4 - Nerve conduction studies
Explanations:
In an injured patient with a widened mediastinum, several structures of
great importance may be injured.
Possible causes of a widened mediastinum include aortic transection, aortic
pseudoaneurysm, esophageal rupture, mediastinal mass, cardiac tamponade,
pericardial hemorrhage, and thoracic vertebral fractures.
CT scans (including CT angiography), cardiac ultrasound, endoscopy, or
bronchoscopy may be required to assess the patient.
Nerve conduction studies are not used to assess patients with a widened
mediastinum. Nerve conduction studies may be used in patients who are
undergoing thoracic aortic aneurysm repair to assess spinal cord viability.
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Research Concepts:
Mediastinal Injury:
Choices:
1. Warfarin
2. Heparin
3. Ampicillin
4. Doxycycline
Answer: 2 - Heparin
Explanations:
Heparin is known to cause severe thrombocytopenia
Thrombocytopenia is a well-recognized complication of heparin therapy
Warfarin is associated with bleeding and skin necrosis
Doxycycline is associated with bone staining
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Research Concepts:
Thrombocytopenia, Heparin Induced:
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Research Concepts:
Spironolactone:
ACE Inhibitors:
Choices:
1. Left lateral decubitus
2. Right lateral decubitus
3. Trendelenburg
4. Lithotomy
Answer: 2 - Right lateral decubitus
Explanations:
The proper patient positioning is healthy side down.
Right lateral decubitus is the best position for this patient.
This position will maximize perfusion to the right lung.
Supine is the next best position.
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Research Concepts:
Pneumonia, Aspiration:
Choices:
1. Hypercapnic respiratory acidosis
2. Hypocapnic respiratory acidosis
3. Hypercapnic respiratory alkalosis
4. Hypocapnic respiratory alkalosis
Answer: 1 - Hypercapnic respiratory acidosis
Explanations:
Excess use of low tidal volume can result in relative hypoventilation.
Hypoventilation can result in hypercapnia with development of respiratory
acidosis.
pH levels of 7.20 are tolerated but lower levels need treatment with
bicarbonate.
Sedation is required with hypercapnia.
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Research Concepts:
Mechanical Ventilation:
Tidal Volume:
Choices:
1. Patients with myocardial infarction
2. Hemochromatosis
3. Normal part of aging
4. Coarctation of aorta
Answer: 3 - Normal part of aging
Explanations:
Brown atrophy of the heart is seen in elderly individuals.
The disorder is due to deposition of pigmented lipofuscin in the cell nuclei.
This finding is normal and part of aging.
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Research Concepts:
Cardiac Aging:
Choices:
1. 0 percent
2. 25 percent
3. 50 percent
4. 100 present
Answer: 3 - 50 percent
Explanations:
Carney complex is an autosomal dominant syndrome so a child with an
affected parent has 50% of chance of the disease
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Research Concepts:
Carney Complex:
Choices:
1. ABO incompatibility
2. Rh factor incompatibility
3. Clerical error
4. Expired blood
Answer: 3 - Clerical error
Explanations:
The number one cause of hemolytic transfusion reaction is clerical error
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Research Concepts:
Hemolytic Transfusion Reaction:
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Research Concepts:
Post-op Wound Infection:
Choices:
1. Digoxin
2. Quinidine
3. Lisinopril
4. Nitroglycerin
Answer: 3 - Lisinopril
Explanations:
Angiotensin-converting enzyme (ACE) inhibitors commonly cause cough
Digoxin can cause arrhythmias
Nitroglycerin can cause headaches
Quinidine is known to cause torsades de pointes
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Research Concepts:
ACE Inhibitors:
Cough:
Choices:
1. 200 joules
2. 250 joules
3. 360 joules
4. 500 joules
Answer: 3 - 360 joules
Explanations:
Current protocols call for no more than 360 joules with defibrillation of
sudden cardiac arrest patients
The initial energy setting should be 200 joules
Protocols gradually increase the energy to a maximum of 360 joules
500 joules would be inappropriate in this setting
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Research Concepts:
Cardiac Arrest:
Choices:
1. Sotalol
2. Quinidine
3. Amiodarone
4. Procainamide
Answer: 4 - Procainamide
Explanations:
Procainamide causes drug induced lupus with positive anti histone antibody
in 95%
Symptoms include facial rash, hemolytic anemia, fever, and joint pain
Antinuclear antibodies occur in 50% of patients treated long term
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Research Concepts:
Lupus Erythematosus, Drug-Induced:
Choices:
1. 0.5 ng/mL
2. 1 ng/mL
3. 1.5 ng/mL
4. 2 ng/mL
Answer: 4 - 2 ng/mL
Explanations:
Serum digoxin levels above 2 ng/mL may cause digoxin toxicity in most
patients
Acute toxicity may lead to GI disturbances and potentially dangerous
arrhythmias
It is also important to investigate serum electrolyte levels if toxicity is
suspected
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Research Concepts:
Digoxin Toxicity:
Choices:
1. Lower extremity edema
2. Tachypnea
3. Diaphoresis
4. None of the above
Answer: 2 - Tachypnea
Explanations:
Tachypnea is present in 96% of patients diagnosed with PE
Diaphoresis is present in 36%
Lower extremity edema is present in 24%
Tachycardia is present in 44%
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Research Concepts:
Pulmonary Embolism:
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Research Concepts:
Pleural Effusion:
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Morphine:
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Research Concepts:
Ventricular Fibrillation:
Choices:
1. Beta blockers
2. Calcium channel blockers
3. Diuretics
4. ACE inhibitors
Answer: 4 - ACE inhibitors
Explanations:
ACE Inhibitors have been shown to reduce mortality and morbidity in CHF.
These agents reduce aldosterone secretion, salt and water retention and
decrease afterload.
ACE inhibitors are now considered first line drugs for CHF.
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Research Concepts:
Angiotensin Converting Enzyme Inhibitors (ACEI):
Choices:
1. Pulmonary infarction
2. Pleural effusion
3. Lung carcinoma
4. Pulmonary hypertension
Answer: 3 - Lung carcinoma
Explanations:
Pulmonary embolus is a common condition and usually a result of DVT or
venous thromboembolic disease
It can lead to pulmonary infarction, pleural effusion or pulmonary
hypertension
The most common symptom of pulmonary infarction is hemoptysis
Lung carcinoma is not a complication of PE
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Research Concepts:
Pulmonary Embolism:
Choices:
1. Erythema nodosum
2. Erythema multiforme
3. Erythema chronicum migrans
4. Psoriasis
Answer: 2 - Erythema multiforme
Explanations:
Stevens-Johnson syndrome is potentially life-threatening and may present
with the same target lesions of erythema multiforme
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Research Concepts:
Erythema Multiforme (Stevens-Johnson Syndrome):
Choices:
1. Tricuspid stenosis
2. Right ventricular hypertrophy
3. Left ventricular hypertrophy
4. Aortic regurgitation
Answer: 2 - Right ventricular hypertrophy
Explanations:
Primary pulmonary hypertension carries an unknown etiology
Associated with right ventricular hypertrophy
The mean survival less than four years from the time of diagnosis
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Research Concepts:
Pulmonary Hypertension, Idiopathic:
Choices:
1. Alpha methyldopa
2. Diltiazem
3. Nitroprusside
4. Furosemide
Answer: 3 - Nitroprusside
Explanations:
Aortic dissection is a surgical emergency. It requires immediate control of
blood pressure.
Various drug combinations have been used in the past. The combination of
nitroprusside and a short acting beta-blocker (esmolol) are the most useful.
Trimethaphan is a ganglionic blocker that can also be used in the treatment
of blood pressure.
In the ICU setting, either a nitroglycerin or nitroprusside drip can be used to
lower blood pressure.
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Research Concepts:
Nitroprusside:
Dissection, Aortic:
Choices:
1. Oral hypoglycemics
2. Plavix
3. Beta blockers
4. Garlic tablets
Answer: 3 - Beta blockers
Explanations:
Beta blockers, if not started in the immediate preoperative period, have
been shown to be beneficial in terms of morbidity and mortality in
cardiovascular surgery.
Oral hypoglycemic medications may cause intraoperative hypoglycemia.
Certain OTC medications may cause hypocoagulation.
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Research Concepts:
Preoperative Evaluation And Management:
Vascular Surgery:
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Research Concepts:
Embolic Stroke:
Choices:
1. BNP
2. Aldosterone
3. ADH
4. Angiotensin I
Answer: 1 - BNP
Explanations:
BNP is a marker for CHF.
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Research Concepts:
Hypotension:
Choices:
1. Substernal chest pain
2. Recurrent syncope
3. Dyspnea on exertion
4. Pulsus paradoxus
Answer: 3 - Dyspnea on exertion
Explanations:
Weight gain due to fluid retention is common during heart failure
Patients often develop exertional dyspnea
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Research Concepts:
Mitral Regurgitation:
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Research Concepts:
Digoxin:
Choices:
1. Atrial flutter
2. Atrial fibrillation
3. Mobitz type II second degree AV block
4. Ventricular arrhythmias
Answer: 4 - Ventricular arrhythmias
Explanations:
The earliest sign of toxicity is ventricular ectopy, usually manifest by
premature ventricular contractions.
Increased automaticity may produce atrial tachyarrhythmias and AV nodal
depression, which frequently produces a high-degree block.
Ventricular arrhythmias (both ventricular tachycardia and ventricular
fibrillation) may be seen in digoxin toxicity.
Atrial flutter, atrial fibrillation, and Mobitz type II second degree AV block
are unlikely to be caused by digitalis toxicity.
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Research Concepts:
Digoxin Toxicity:
Choices:
1. Quinidine
2. Amiodarone
3. Digoxin
4. Procainamide
Answer: 4 - Procainamide
Explanations:
Procainamide can cause a "lupus-like" reaction including fever, arthralgias,
hemolytic anemia, and rash.
Quinidine toxicity causes torsades-de-pointe and cinchonism or a syndrome
of headache, tinnitus, psychosis, and headache.
Amiodarone can cause hypotension, bradycardia, AV block, pulmonary or
hepatic toxicity, and optic neuritis.
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Research Concepts:
Procainamide:
Choices:
1. Propranolol
2. NTG
3. ACE Inhibitor
4. Nifedipine
Answer: 4 - Nifedipine
Explanations:
Prinzmetal angina is also known as variant angina and is usually caused by
vasospasm of the coronary vessels.
Prinzmetal tends to be more frequent in young females and often occurs at
rest.
The majority of patients already have some degree of atherosclerosis in the
coronary vessels but the disease is mild in nature.
Prinzmetal responds to calcium channel blockers, particularly nifedipine. In
the rare patient it may respond to nitroglycerin but the response is very
short lived.
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Research Concepts:
Angina, Prinzmetal:
Choices:
1. Tachycardia and hypotension
2. Bradycardia and increased cardiac index
3. Tachycardia and elevated PCWP
4. Elevated central venous pressure and hypotension
Answer: 1 - Tachycardia and hypotension
Explanations:
Hemodynamic findings associated with hypovolemic shock include
tachycardia and hypotension
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Research Concepts:
Hypovolemic Shock:
Choices:
1. Anxiolytics
2. Proton pump inhibitors
3. Nitrates PRN
4. Anti-inflammatory drugs
Answer: 4 - Anti-inflammatory drugs
Explanations:
This case is likely due to Dressler syndrome, also known as post
myocardial infarction syndrome, which is a benign autoimmune pleuritis or
pericarditis that occurs up to 2-3 weeks after MI
It occurs most commonly following open heart surgery, ST elevation MI, or
if there was pericardial bleeding
Therapy is rest and NSAIDs or sometimes glucocorticoids
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Research Concepts:
Myocardial Infarction:
Dressler Syndrome:
Choices:
1. Minutes
2. Days
3. Months
4. Years
Answer: 3 - Months
Explanations:
Hyperacute transplant rejection occurs within minutes.
Acute rejection occurs within weeks to several months.
Chronic rejection usually occurs after several years.
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Research Concepts:
Acute Transplant Rejection:
Choices:
1. Hypertensive emergency
2. High output failure
3. Arteriovenous shunting
4. Aortic coarctation
Answer: 1 - Hypertensive emergency
Explanations:
All of the above conditions may be associated with hypertension
Hypertensive emergency is characterized by severe hypertension and organ
damage
Blood pressure should be reduced by nitroprusside
Nitroprusside is contraindicated for treatment of compensatory
hypertension
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Research Concepts:
Sodium Nitroprusside:
Hypertension, Malignant:
Choices:
1. Phrenic nerve
2. Cardiac nerve
3. Lungs
4. Thymus
Answer: 3 - Lungs
Explanations:
The mediastinum is the central compartment of the thoracic cavity.
In it are the heart, great vessels, esophagus, trachea, phrenic nerve, thoracic
duct, cardiac nerve, thymus, and lymph nodes.
These are surrounded by loose connective tissue.
The lungs are not in the mediastinum.
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Research Concepts:
Mediastinum Anatomy:
Choices:
1. Disopyramide
2. Timolol
3. Sotalol
4. Verapamil
Answer: 3 - Sotalol
Explanations:
Sotalol is a class III antiarrhythmic drug
Sotalol is a beta blocker, but it also acts on potassium channels
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Research Concepts:
Antiarrhythmic Medication:
Sotalol:
Choices:
1. Advanced age
2. Heredity
3. Diabetes
4. Use of estrogens
Answer: 4 - Use of estrogens
Explanations:
Estrogens are not a risk factor for atherosclerosis.
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Research Concepts:
Atherosclerosis:
Choices:
1. A patient with T-cell lymphoma of the nasal cavity
2. A patient with B-cell lymphoma of the nasal cavity
3. A patient diagnosed with posttransplant immunoproliferative disorders
4. 1 and 3
Answer: 4 - 1 and 3
Explanations:
T-cell lymphoma is frequently of natural killer (NK) cell phenotype. NK
cells perform cell-mediated cytotoxicity without prior sensitization or major
histocompatibility complex.
Epstein Barr virus infection causes NK cell activation and migrate to the
nasal mucosa.
It is theorized that a single clone of NK cells with other molecular accidents
proliferate without regulation and become an NK cell lymphoma. This has
been observed with EBV and NK cell proliferation in post-transplant
immunoproliferative disorders.
EBV infection has not been shown to be linked to NK cell and T cell
lymphomas.
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Research Concepts:
Posttransplantation Lymphoproliferative Disorders:
T-Cell Lymphoma:
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Question 382: Which of the following is not a clinical feature of
hypocalcemia?
Choices:
1. Laryngospasm
2. Prolonged QT interval on EKG
3. Positive Trousseau sign
4. Short PR interval on EKG
Answer: 4 - Short PR interval on EKG
Explanations:
Laryngospasm, prolonged QT interval on EKG, and a positive Trousseau
sign are common findings in hypocalcemia
Short PR interval is not a typical sign on EKG
The signs and symptoms of acute hypocalcemia typically result from
increased neuromuscular irritability
Other signs and symptoms include seizures, irritability, impaired school
performance, and behavioral changes.
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Research Concepts:
Hypocalcemia:
Choices:
1. Apo A
2. Apo B
3. Apo C
4. Apo E
Answer: 2 - Apo B
Explanations:
Apolipoprotein B (Apo B) is the major protein involved in forming LDL
and VLDL.
Apolipoprotein A (Apo A) is the major protein in HDL.
Apolipoprotein C (Apo C) is involved in activating lipoprotein lipase.
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Research Concepts:
Apolipoprotein-B:
Choices:
1. Hypertrophic obstructive cardiomyopathy
2. Mitral valve prolapse
3. Dilated cardiomyopathy
4. Atrial fibrillation
Answer: 1 - Hypertrophic obstructive cardiomyopathy
Explanations:
Hypertrophic cardiomyopathy may be associated with atrial fibrillation and
ventricular tachycardia.
The murmur of hypertrophic obstructive cardiomyopathy is a systolic
ejection murmur that worsens with the Valsalva maneuver.
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Research Concepts:
Hypertrophic Obstructive Cardiomyopathy:
Choices:
1. Increases cardiac contractility
2. Increases cardiac output
3. Decreases peripheral resistance
4. Increases peripheral resistance
Answer: 4 - Increases peripheral resistance
Explanations:
Dobutamine is beta 1-adrenergic agonist, with weak beta 2 activity, and
alpha 1 selective activity
Dobutamine can be used in CHF to increase cardiac output
Its primary mechanism is direct stimulation of ?1 receptors
It does not cause increased peripheral resistance
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Research Concepts:
Dobutamine:
Choices:
1. Left coronary artery
2. Right coronary artery
3. Thoracic artery
4. Internal carotid
Answer: 2 - Right coronary artery
Explanations:
The middle cardiac vein commences at the apex of the heart.
It ascends in the posterior longitudinal sulcus, and ends in the coronary
sinus near its right extremity.
It is accompanied by the right coronary artery in the posterior
interventricular groove.
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Research Concepts:
Heart Anatomy:
Choices:
1. Imipenem-Cilastatin
2. Ciprofloxacin
3. Linezolid
4. Clarithromycin
Answer: 3 - Linezolid
Explanations:
Linezolid can be used to treat Staphylococcus aureus including MRSA or
Streptococcus pneumonia
It is also used for treatment of vancomycin-resistant Enterococcus faecium
(VRE) infection
The other medications would not be effective for a high profile resistant
bacteria such as VREs
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Research Concepts:
Vancomycin Resistant Enterococcus (VRE):
Choices:
1. Cardiac output
2. Myocardial oxygen demand
3. Heart rate
4. Coronary perfusion
Answer: 2 - Myocardial oxygen demand
Explanations:
An intra-aortic pump improves cardiac output and reduces oxygen demand.
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Research Concepts:
Intra-Aortic Balloon Pump:
Choices:
1. They are the preferred way to manage agitated patients
2. They are used instead of sedative medications
3. They are the best way to preserve a patient's autonomy
4. They are indicated when a patient's behavior poses a significant risk of
damage to equipment
Answer: 4 - They are indicated when a patient's behavior poses a significant
risk of damage to equipment
Explanations:
Patient restraints are indicated when a patient's behavior poses a significant
risk of damage to equipment or injury to himself or others
They violate a patient's autonomy and should be used only when other
methods of behavior control have failed
Sedatives should generally accompany the use of restraints
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Research Concepts:
Patient Restraint:
Choices:
1. Right thoracotomy
2. Chest x-ray
3. Chest tube
4. Endoscopy
Answer: 1 - Right thoracotomy
Explanations:
Subcutaneous emphysema feels like crunchy skin with crackles. It may
result from air escaping from the respiratory tract or the gastrointestinal
tract.
Most cases of subcutaneous emphysema occur in the intensive care unit in
ventilated patients who develop pneumothorax. In such cases, the air starts
to track up underneath the skin.
Symptoms may include difficulty swallowing, neck pain, and sore throat. If
there is subcutaneous emphysema in the presence of a chest tube, this
indicates that the tube is not functioning or is blocked.
Most cases of subcutaneous emphysema are benign but one should obtain a
chest x-ray to ensure there is no pneumothorax. The chest tube should be
repositioned. Breathing oxygen helps the body absorb subcutaneous air.
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Research Concepts:
Subcutaneous Emphysema:
Choices:
1. Atrial septal defect
2. Ventricular septal defect
3. Patent ductus arteriosus
4. Tetralogy of Fallot
Answer: 4 - Tetralogy of Fallot
Explanations:
Tetralogy of Fallot is a right to left shunt and does not lead to Eisenmenger
syndrome.
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Research Concepts:
Eisenmenger Syndrome:
Choices:
1. Post-PTCA TIMI flow grade <3
2. Advanced age
3. Triple vessel disease
4. Atrial fibrillation
Answer: 4 - Atrial fibrillation
Explanations:
Stone et al analyzed patient characteristics and the efficacy of primary
PTCA in patients with prior CABG and AMI
Independent determinants of late mortality in this group included advanced
age, triple vessel disease, Killip class and post-PTCA TIMI flow grade <3
Reperfusion success of primary PTCA in those with prior CABG was
reduced as compared in those without prior CABG
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Research Concepts:
Coronary Artery Bypass Graft:
Choices:
1. Bradycardia
2. Cold skin
3. Slow capillary refill
4. Confusion
Answer: 1 - Bradycardia
Explanations:
Hemorrhagic shock is result of blood loss.
It results in end organ hypoperfusion.
It usually causes tachycardia initially.
Bradycardia may result in the latter stages if untreated.
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Research Concepts:
Shock, Hemorrhagic:
Choices:
1. Descending aorta
2. Internal carotid artery
3. Pulmonary artery
4. None of the above
Answer: 2 - Internal carotid artery
Explanations:
The third aortic arch gives rise to the internal carotid arteries.
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Research Concepts:
Embryology:
Choices:
1. Ticlopidine
2. Warfarin
3. Low molecular weight heparin
4. Lepirudin
Answer: 4 - Lepirudin
Explanations:
Lepirudin is a direct acting thrombin inhibitor. It is a synthetic product
based on hirudin, a peptide found in leech saliva.
It is indicated for patients with heparin-induced thrombocytopenia with or
without clot.
Lepirudin can cause an anaphylactic reaction in patients with prior
exposure.
Warfarin should not be started until thrombocytopenia has resolved.
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Research Concepts:
Thrombocytopenia, Heparin Induced:
Choices:
1. Ventricular septal defect
2. Transposition of the great vessels
3. Tetralogy of Fallot
4. Endocardial cushion defect
Answer: 4 - Endocardial cushion defect
Explanations:
The patient has Down syndrome with duodenal atresia
The most common cardiac defect in patients with Down syndrome is
endocardial cushion defect
ASD and VSD are also seen but not as often
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Research Concepts:
Down Syndrome:
Duodenal Atresia:
Choices:
1. 0
2. 1
3. 2
4. 3
Answer: 2 - 1
Explanations:
For a clean surgical case like a mastectomy, usually one dose of antibiotic
given preoperatively is sufficient.
The antibiotic should be administered within 1 hour before incision to
provide adequate blood levels.
The dressing should be covered from 24-48 hours with a non adherent
sterile dressing.
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Research Concepts:
Antibiotics:
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Research Concepts:
Aspirin:
Choices:
1. Heart failure
2. Aortic regurgitation
3. Dilated cardiomyopathy
4. Coronary atherosclerosis disease
Answer: 2 - Aortic regurgitation
Explanations:
Pulsus alternans is an alternating weak and strong pulse without a change in
cycle length.
Pulsus alternans is commonly seen in heart failure but can be seen in any
disorder where there is increased resistance to left ventricular ejection.
Other disorders which show pulsus alternans include hypertension, aortic
stenosis, and dilated cardiomyopathy.
Severe coronary artery disease can also be associated with pulsus alternans.
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Research Concepts:
Pulsus Alternans:
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Research Concepts:
Coronary Artery Anatomy:
Choices:
1. 900 ml
2. 800 ml
3. 1200 ml
4. 600 ml
Answer: 2 - 800 ml
Explanations:
Alveolar ventilation plus dead space ventilation equals total ventilation
(175+325=500)
The alveolar ventilation is 6,000 ml per minute which needs to be divided
into 20 respirations, or 300 ml per respiration
300+500=800
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Research Concepts:
Ventilator Management:
Choices:
1. Dyspnea
2. Bloated feeling with nausea
3. Squeezing chest pain that is relieved with rest
4. Right arm pain radiating to the jaw
Answer: 3 - Squeezing chest pain that is relieved with rest
Explanations:
The chest pain from angina is often described as crushing or squeezing in
nature.
The pain may be associated with diaphoresis, dizziness, or dyspnea.
Some patients may also complain of left arm pain radiating to the jaw. This
feature of anginal pain occurs in at least 5-15% of patients.
Pain from angina can present with a variety of symptoms. It is important to
have a high degree of suspicion in order to make the correct diagnosis.
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Research Concepts:
Coronary Artery Disease:
Choices:
1. Ask the next of kin for a firm decision
2. Use blood volume expanders and hope for the best
3. Call the hospital attorney to authorize blood transfusion
4. Transfuse blood
Answer: 1 - Ask the next of kin for a firm decision
Explanations:
The first obligation is to follow the wishes of the patient, in this case, the
spouse should have a clear knowledge of the patient's wishes and as a
result, those wishes should be followed
The next of kin has a right to refuse treatment
Volume expanders may be tried
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Research Concepts:
Autonomy:
Choices:
1. Irregular pulse
2. Increased pulse pressure
3. Ankle edema
4. Third heart sound (S3)
Answer: 2 - Increased pulse pressure
Explanations:
The pulse pressure is decreased in cardiogenic shock and most other forms
of shock
It is often increased in septic shock, especially during the early stages
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Research Concepts:
Cardiogenic Shock:
Choices:
1. Papillary muscles and chordae tendineae
2. Pectinate muscles
3. AV and SA nodes
4. Myometrium
Answer: 1 - Papillary muscles and chordae tendineae
Explanations:
The flaps on the bicuspid valve and tricuspid valve are connected to the
chordae tendineae which is connected to the papillary muscle.
They prevent the cusps from being everted into the atrium during
ventricular contraction.
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Research Concepts:
Cardiac Physiology:
Heart Anatomy:
Choices:
1. Metolazone
2. Labetalol
3. Enalapril
4. Nifedipine
Answer: 2 - Labetalol
Explanations:
Beta-blockers like labetalol are contraindicated in asthmatic patients
Selective beta-blockers like metoprolol can be used with relative safety in
asthmatic patients
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Research Concepts:
Antihypertensive Medications:
Asthma:
Choices:
1. Elevated blood pressure
2. Presence of S3 on auscultation of the heart
3. Decrease in serum potassium level
4. Nausea and vomiting
Answer: 3 - Decrease in serum potassium level
Explanations:
The caregiver will observe for a decrease in serum potassium levels when
patients are taking furosemide (Lasix). Normal potassium levels are 3.5 to
5.5 mEq/l. The most significant side effects of furosemide include depletion
of potassium (K) and sodium (Na), and hypotension. Patients should be
specifically monitored for hypokalemia.
Furosemide (Lasix) is a loop diuretic that increases excretion of water and
electrolytes (e.g., potassium and sodium). Diuretics tend to lower blood
pressure, not elevate it.
Therefore, clients receiving loop diuretics should be assessed for
hypotension. An S3 heart sound is a sign of congestive heart failure, which
should improve with the administration of a diuretic like furosemide
(Lasix).
Furosemide may cause nausea and vomiting, but these are mild side effects
compared to a decrease in serum potassium levels, which may be life
threatening. Client Need: Physiological Integrity
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Research Concepts:
Loop Diuretics:
Choices:
1. Patients with artificial heart valves
2. Patients with a history of infectious endocarditis
3. Patients with a history of uncorrected congenital cyanotic heart disease
4. Patients with cardiac transplant and no cardiac abnormalities
Answer: 4 - Patients with cardiac transplant and no cardiac abnormalities
Explanations:
In 2009, the American Heart association narrowed the recommendations for
SBE prophylaxis
It was found that the risks of antibiotics outweighed the benefits in most
patients
Cardiac transplant patients with valvular lesions should receive antibiotics
Patients with cyanotic congenital heart disease with prosthetic materials for
6 months only
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Research Concepts:
SBE Prophylaxis:
Choices:
1. Between the third and fourth intercostal space
2. Between the fourth and fifth intercostal space
3. Between the third and second intercostal space
4. Between the first and second intercostal space
Answer: 1 - Between the third and fourth intercostal space
Explanations:
The point of maximum impulse in a young infant can be located between
the third and fourth intercostal space
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Research Concepts:
Cardiac Exam:
Choices:
1. It increases preload and afterload
2. It increases preload and reduces afterload
3. It increases afterload and reduces preload
4. It reduces both preload and afterload
Answer: 4 - It reduces both preload and afterload
Explanations:
ACE inhibitors block the conversion of angiotensin I to the more potent
angiotensin II
This reduces the afterload by preventing vasoconstriction
Aldosterone production is also inhibited by ACE inhibitors
This would result in reduced intravascular volume and reduction in preload
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Research Concepts:
ACE Inhibitors:
Choices:
1. Procainamide
2. Quinidine
3. Lidocaine
4. Amiodarone
Answer: 4 - Amiodarone
Explanations:
Amiodarone can cause pulmonary fibrosis with long-term use
Routine lung function testing is indicated
It can also cause thyroid and liver problems
Procainamide may cause torsades
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Research Concepts:
Amiodarone:
Choices:
1. Cellulitis of the right chest
2. Infectious endocarditis
3. Lymphangitis of the right groin
4. Presence of crohn disease
Answer: 2 - Infectious endocarditis
Explanations:
Staphylococcus induced liver abscess usually occurs by hematogenous
spread.
One disorder where this commonly occurs is infectious endocarditis.
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Research Concepts:
Endocarditis, Infectious:
Liver Abscess:
Choices:
1. Ampicillin
2. Nitroglycerin
3. Warfarin
4. Metformin
Answer: 2 - Nitroglycerin
Explanations:
The bioavailability of nitroglycerin is markedly reduced after oral
administration
This is because nitroglycerin undergoes extensive first pass metabolism
Sublingual nitroglycerin is administered for rapid effect
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Research Concepts:
Nitroglycerin:
Choices:
1. Ectopic ventricular beats
2. ST segment depression continuing into recovery
3. Failure to achieve 90% of maximal predicted heart rate
4. Exercise induced, 2 mm up-sloping ST segments during exercise
Answer: 2 - ST segment depression continuing into recovery
Explanations:
ST segment depression lasting for more than 6 minutes in recovery is of
greatest concern
Target heart rate is 85% of maximal predicted heart rate
Ectopy alone should be noted but is not clear evidence of ischemia
Up-sloping ST elevation is not diagnostic
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Research Concepts:
Treadmill Stress Testing:
Choices:
1. Television
2. Excess humidity
3. Direct light
4. Snow
Answer: 3 - Direct light
Explanations:
Nitroglycerin is supplied in sublingual, transdermal, and intravenous form
Must keep away from direct light
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Research Concepts:
Nitroglycerin:
Choices:
1. Mitral stenosis
2. Acute mitral regurgitation
3. Myocardial abscess
4. Oscillating mass
Answer: 1 - Mitral stenosis
Explanations:
Echocardiogram findings are second major criteria after blood culture
results
Acute mitral regurgitation, myocardial abscess, and oscillating masses are
considered major evidences for infective endocarditis
An echocardiogram finding of stenosed mitral valve is not considered as an
evidence of infective endocarditis
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Research Concepts:
Endocarditis, Infectious:
Choices:
1. Fever
2. Septic arthritis
3. Hematuria
4. Heberden nodes
Answer: 4 - Heberden nodes
Explanations:
Clinical features of endocarditis are highly variable and non specific. Fever
is common and the patient may appear toxic.
Besides heart failure, other features may include hematuria, petechiae,
septic arthritis, pneumonia, malaise, splenomegaly, or conjunctival
hemorrhage.
Physical findings include Osler nodes, Roth spots, splinter hemorrhages, or
Janeway lesions.
Heberden nodes are hard bony swellings seen in the distal IP joints in
osteoarthritis.
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Research Concepts:
Endocarditis, Bacterial:
Choices:
1. Disopyramide
2. Timolol
3. Sotalol
4. Verapamil
Answer: 4 - Verapamil
Explanations:
Verapamil is a class IV antiarrhythmic drug
Blocks calcium channel
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Research Concepts:
Verapamil:
Antiarrhythmic Medication:
Choices:
1. Delto-pectoral fascia
2. Visceral pleura
3. Parietal pleura
4. Serous pericardium
Answer: 2 - Visceral pleura
Explanations:
The parietal pleura lines the chest wall.
The visceral pleura lines the lung and surrounding structures.
The parietal pleura is sensitive to pain but the visceral pleura has no
innervation.
The visceral pleura develops from the visceral mesoderm layer.
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Research Concepts:
Thorax Anatomy:
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Research Concepts:
Ventricular Septal Defect:
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Research Concepts:
Colloid Solutions:
Choices:
1. S in V1 + R in V5 or V6 > 35 mm
2. R or S in a limb lead >20 mm
3. S in V1 or V2 >30 mm
4. R in aVR >9 mm
Answer: 4 - R in aVR >9 mm
Explanations:
aVR is a limb lead with negative deflection as its primary vector
In LVH the S wave would be larger without R wave effects
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Research Concepts:
Electrocardiogram:
Choices:
1. Sweating
2. Dyspnea
3. Heartburn
4. Somnolence
Answer: 4 - Somnolence
Explanations:
Sympathetic stimulation is very common in patients with acute MI
Chest pain during acute MI is often mistaken for heartburn
High degree of suspicion is needed to diagnose acute MI
Agitation is also common with the other sympathetic symptoms
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Research Concepts:
Acute Myocardial Infarction:
Choices:
1. Varicose veins
2. Obesity
3. Infection
4. Male sex
Answer: 4 - Male sex
Explanations:
Other risk factors include malignancy, oral contraceptives, long surgical
duration, and genetic hypercoagulability.
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Research Concepts:
Deep Venous Thrombosis, Lower Extremity:
Choices:
1. Too short a length of mammary may prevent usage
2. Subclavian artery stenosis may decrease flow in the IMA
3. Failure to clip proximal branches may lead to steal
4. In situ IMA grafts have same patency as free mammary grafts
Answer: 4 - In situ IMA grafts have same patency as free mammary grafts
Explanations:
Studies to date show that free IMA grafts have a lesser patency than in situ
grafts.
When the IMA is short, grafts using the radial artery can be done.
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Research Concepts:
Internal Mammary Artery Bypass:
Choices:
1. Brain
2. Kidney
3. Lung
4. Spleen
Answer: 3 - Lung
Explanations:
Emboli formed in the left ventricle usually embolize in the arterial
circulation.
The most common site of embolization is the brain, followed by the
extremities.
Mural thrombi from the left ventricle can only go to the lung if there is a
ventricular septal defect present.
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Research Concepts:
Mural Thrombi:
Choices:
1. Endocarditis
2. Rheumatic fever
3. Calcification of bicuspid valve
4. Degeneration of the valve
Answer: 3 - Calcification of bicuspid valve
Explanations:
The most common cause of aortic stenosis in North America is calcification
of a bicuspid aortic valve.
In those over 70 years of age, it is due to degeneration.
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Research Concepts:
Aortic Stenosis:
Choices:
1. The diaphragm is always reconstructed with a Gortex patch
2. Gortex patch becomes lax with time
3. Marlex mesh gets incorporated in the tissues and maintains shape
4. Gortex gets incorporated into tissues and is expensive
Answer: 4 - Gortex gets incorporated into tissues and is expensive
Explanations:
Gortex does not incorporate into tissues.
It is more expensive than Marlex.
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Research Concepts:
Chest Wall Reconstruction Surgery:
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Research Concepts:
Tricuspid Stenosis:
Choices:
1. Renal veins
2. Deep leg veins
3. Inferior mesenteric veins
4. Splenic veins
Answer: 2 - Deep leg veins
Explanations:
The majority of deep vein clots arise from the large pelvic and thigh veins.
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Research Concepts:
Pulmonary Embolism:
Choices:
1. Left atrial enlargement
2. Depressed left main stem bronchus
3. Double cardiac opacity
4. Prominent left heart border
Answer: 2 - Depressed left main stem bronchus
Explanations:
Chest radiographic signs of mitral stenosis include an enlarged left atrium,
prominent left heart border, and double cardiac opacity (enlarged LA seen
through LV).
The enlarged left atrium usually pushes the left mainstem bronchus up.
Complications include pulmonary edema and pleural effusions.
The imaging study of choice to assess mitral stenosis is cardiac US.
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Research Concepts:
Mitral Stenosis:
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Research Concepts:
Body Fluids:
Choices:
1. Dyspnea
2. Unilateral lower extremity edema
3. Pleuritic chest pain
4. Erythema multiforme
Answer: 4 - Erythema multiforme
Explanations:
Erythema multiforme is not associated with PE
Some common symptoms of PE are dyspnea, pleuritic chest pain, and
cough
Unilateral lower extremity edema is suggestive of DVT, which is
commonly associated with PE
Most of the symptoms of PE are nonspecific and health care professionals
need to have a high index of suspicion
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Research Concepts:
Pulmonary Embolism:
Choices:
1. Supplemental oxygen
2. Antibiotics
3. Bed rest
4. Incentive spirometry
Answer: 4 - Incentive spirometry
Explanations:
Post-operative patients should have an incentive spirometer at their bedside
so it is available for frequent use (eg, every 1 to 2 hours).
Incentive spirometry is one of the most effective noninvasive methods to
prevent atelectasis.
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Research Concepts:
Atelectasis:
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Research Concepts:
Quinidine:
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Research Concepts:
Beta-Blockers:
Bronchoconstriction:
Choices:
1. A 39-year-old with porcine valve implanted less than 2 years ago
2. A 29-year-old HIV male
3. A 71-year-old with hip prosthesis
4. A 65-year-old with Parkinson disease
Answer: 4 - A 65-year-old with Parkinson disease
Explanations:
Prophylaxis for dental procedures is warranted in certain patients who are at
risk of infections.
The presence of prostheses, immunosuppression, and valvular heart disease
needs antibiotic prophylaxis before any dental procedure.
Antibiotic prophylaxis is not recommended for patients with Parkinson
disease.
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Research Concepts:
SBE Prophylaxis:
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Research Concepts:
Pulmonic Stenosis:
Choices:
1. Barotrauma
2. Decreased venous return
3. Increased renal flow
4. Reduced cardiac output
Answer: 3 - Increased renal flow
Explanations:
Ventilation reduces venous return and cardiac output
Also reduces renal blood flow
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Research Concepts:
Ventilator Complications:
Choices:
1. Heparin
2. Tissue plasminogen activator
3. Streptokinase
4. Warfarin
Answer: 2 - Tissue plasminogen activator
Explanations:
TPA is more effective than streptokinase as a thrombolytic agent.
Heparin and warfarin are blood thinners.
Streptokinase is no longer available in the United States.
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Research Concepts:
Thrombolytic Therapy:
Choices:
1. Ibuprofen
2. Aspirin
3. Colchicine
4. Corticosteroids
Answer: 2 - Aspirin
Explanations:
Asprin is usually used for Dressler syndrome.
Other nonsteroidal anti-inflammatory drugs and corticosteroids are
deleterious to ventricular remodeling during acute MI and can result in
ventricular rupture.
Rarely methotrexate or intravenous immunoglobulin are used.
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Research Concepts:
Pericarditis, Acute:
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Research Concepts:
Latex Allergy:
Choices:
1. 7 days
2. 3 days
3. 14 days
4. 3 months
Answer: 3 - 14 days
Explanations:
Pulmonary emboli do resolve with anticoagulation therapy.
In most cases, 36% of lung defects resolve in 5 days and 50% resolve in 3
months.
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Research Concepts:
Pulmonary Embolism:
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Pseudomonas:
Choices:
1. Endocarditis prophylaxis for dental work
2. Observation
3. ECG and echocardiogram
4. Cardiology referral
Answer: 3 - ECG and echocardiogram
Explanations:
The murmur is consistent with atrial septal defect.
There is increased flow across the pulmonic valve secondary to left-to-right
shunting.
The ECG may show right ventricular hypertrophy and the echocardiogram
may show cardiomegaly.
Endocarditis prophylaxis is not needed and if the ASD does not close,
elective repair may be needed.
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Research Concepts:
Atrial Septal Defect:
Choices:
1. Loud S1
2. Soft A2
3. Loud P2
4. S2 splits
Answer: 3 - Loud P2
Explanations:
Pulmonary hypertension is characterized by a loud P2
There can be the murmur of pulmonary regurgitation.
Some patients have a right ventricular heave or signs of right heart failure.
Late findings are hepatomegaly with palpable pulsations of the liver and
abdominal-jugular reflex.
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Research Concepts:
Pulmonary Hypertension:
Choices:
1. Nifedipine
2. Clonidine
3. Propranolol
4. Methyldopa
Answer: 3 - Propranolol
Explanations:
Propranolol is a non-selective beta-blocker
Propranolol also has some local anesthetic activity but is not a partial
agonist
Propranolol is often used to treat hypertension, angina, arrhythmias,
migraine, hyperthyroidism and essential tremor
Propranolol can worsen asthma, induce AV block and worsen heart failure
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Research Concepts:
Propranolol:
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Research Concepts:
Atrial Myxoma:
Choices:
1. Particle size
2. Degree of ionization
3. Lipid solubility
4. Shape
Answer: 4 - Shape
Explanations:
Rate of absorption of a drug is affected by particle size
Non-ionized particles are better absorbed than more ionized particles
Lipid solubility greatly affects rate of absorption with lipid soluble ones
passing fast than others
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Research Concepts:
Drug Absorption:
Choices:
1. Superior border made by inguinal ligament
2. Lateral border by sartorius
3. Medial border by adductor longus
4. Posterior border by psoas muscle
Answer: 4 - Posterior border by psoas muscle
Explanations:
The femoral vein lies in the femoral triangle
The superior border is made by the inguinal ligament
The lateral border is made by the sartorius
The medial border is made by the adductor longus
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Research Concepts:
Femoral Triangle:
Choices:
1. Hyperglycemia
2. Hypoglycemia
3. Ketoacidosis
4. Hyperosmolar coma
Answer: 2 - Hypoglycemia
Explanations:
All beta-blockers can cause hypoglycemia.
Beta blockers inhibit the sympathetic response to hypoglycemia and can
mask the onset of insulin coma.
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Research Concepts:
Hypoglycemia:
Beta-Blockers:
Choices:
1. Vertebral defects
2. Aniridia
3. Trachea-esophageal fistula
4. Radial dysplasia
Answer: 2 - Aniridia
Explanations:
VACTERL or VATER association of disorders encompasses a wide range of
anomalies
Vertebral defects, anal atresia, cardiovascular defects, tracheoesophageal
fistula, renal defects, and limb are common with this condition
Aniridia is not part of VATER association
Radial dysplasia is another typical feature of this disease
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Research Concepts:
VACTERL Association:
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Research Concepts:
Antiplatelet Medications:
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Research Concepts:
Ventricular Septal Defect:
Choices:
1. Antibody-mediated immunity
2. Cell-mediated immunity
3. Cell-mediated immunity to minor HLA antigens
4. Preformed ABO blood group antibodies
Answer: 4 - Preformed ABO blood group antibodies
Explanations:
Hyperacute rejection occurs within minutes to a few hours of the time of
transplantation
This is often caused by preformed antibodies
Preformed antibodies can also be due to pre sensitization to a previous graft
or blood transfusion
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Research Concepts:
Graft Rejection:
Choices:
1. Anterior interventricular artery
2. Circumflex artery
3. Posterior interventricular artery
4. Right coronary artery
Answer: 1 - Anterior interventricular artery
Explanations:
The anterior interventricular artery, also known as the left anterior
descending artery, is one of the divisions of the left coronary artery.
It runs down the surface of the interventricular septum towards the apex.
It sends branches to the interventricular septum to supply most of its
myocardium and into the myocardium of the adjacent right and left
ventricle.
It is one of the most involved in coronary occlusions and is often the one
that is bypassed in cardiac bypass surgery.
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Research Concepts:
Left Anterior Descending Artery (LAD):
Choices:
1. Beta blocker
2. Alpha blocker
3. ACE inhibitor
4. Calcium channel blocker
Answer: 1 - Beta blocker
Explanations:
Beta blocker has shown to lower the risk of myocardial infarction
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Research Concepts:
Primary And Secondary Prevention Of Coronary Artery
Disease:
Choices:
1. Echocardiogram
2. CT scan
3. Hydralazine
4. Observation
Answer: 1 - Echocardiogram
Explanations:
Echocardiogram is indicated to diagnose aortic arch aneurysm
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Research Concepts:
Aortic Arch Aneurysm:
Choices:
1. Fibrinogen
2. Serotonin
3. Albumin
4. Erythrocytes
Answer: 1 - Fibrinogen
Explanations:
The extraction of fibrinogen and coagulation factors II, V. and VIII converts
plasma to serum.
Whole blood, allowed to clot and followed by the removal of the clot,
establishes the conversion of plasma to serum.
Albumen is present in both plasma and serum.
Erythrocytes are absent in both blood products.
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Research Concepts:
Plasma:
Choices:
1. Lupus
2. Hemosiderosis
3. Rheumatic fever
4. Pneumonia
Answer: 3 - Rheumatic fever
Explanations:
Rheumatic fever is an inflammatory disorder that develops several weeks
after a Group A streptococcal infection. The infection can affect the brain,
heart, skin, and joints.
The pathological hallmarks of rheumatic carditis are McCallum patch and
the Aschoff nodule.
McCallum patches are defined as warty protuberances arising from the
bacterial deposits, which results in irregular thickening of the valves.
The major Jones criteria for diagnosis include migratory polyarthritis,
carditis, a new heart murmur, subcutaneous nodules, erythema marginatum,
and Sydenham chorea.
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Research Concepts:
Rheumatic Fever, Pathology:
Choices:
1. Bundle branch block
2. Atrial fibrillation
3. Myocardial infarction
4. Multifocal atrial tachycardia
Answer: 2 - Atrial fibrillation
Explanations:
The most probable etiology of this scenario is rheumatic heart disease
Atrial fibrillation is the most probable complication
Bundle branch block or myocardial infarction is unlikely in this patient
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Research Concepts:
Heart Failure, Congestive:
Mitral Stenosis:
Choices:
1. Tactile fremitus
2. Bronchophony
3. Egophony
4. All of the above
Answer: 4 - All of the above
Explanations:
All of the voice transmission tests have been largely supplanted by the CXR
In egophony, there are "E to A" changes upon auscultation
In bronchophony, "99" is heard upon auscultation instead of muffled,
indistinct sounds
Voice transmission tests are employed when there is a high suspicion for
lung consolidation in disease such as pneumonia
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Research Concepts:
Lung Exam:
Choices:
1. Atherosclerosis of the femoral artery
2. Coarctation of aorta
3. Aortic regurgitation
4. Aortic aneurysm
Answer: 3 - Aortic regurgitation
Explanations:
Duroziez sign is a feature of aortic insufficiency.
When the femoral artery is compressed, you will hear an audible diastolic
murmur.
Duroziez sign is just one feature of aortic aneurysm.
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Research Concepts:
Aortic Insufficiency:
Duroziez Sign:
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Research Concepts:
Atrial Septal Defect:
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Research Concepts:
Essential Hypertension:
Choices:
1. Preformed antibody
2. T cell
3. Neutrophil
4. Macrophage
Answer: 1 - Preformed antibody
Explanations:
Hyperacute graft rejection due to preformed antibody.
Characterized by fever, rash, and diarrhea.
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Research Concepts:
Hyperacute Transplant Rejection:
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Research Concepts:
Oliguria:
Choices:
1. Increase heart rate
2. Elevate blood pressure
3. Lyse blood clots
4. Promote diuresis
Answer: 3 - Lyse blood clots
Explanations:
Alteplase (t-PA) lyses blood clots. Thrombolytic medications (agents that
dissolve thrombi), such as alteplase (t-PA), cause fibrinolysis.
Thrombolytics activate plasminogen by converting it to plasmin. The
plasmin in turn lyses fibrin clots.
Any change in heart rate, blood pressure, and diuresis would be a result of
changes in cardiac output as a consequence of the success of fibrinolysis.
Patient Need: Physiological Integrity
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Research Concepts:
Thrombolytic Therapy:
Choices:
1. Serum calcium level of 9
2. Serum potassium level of 6
3. Hematocrit of 35%
4. Absolute neutrophil count of 750
Answer: 2 - Serum potassium level of 6
Explanations:
Hyperkalemia can cause arrhythmias when under general anesthesia.
Preoperative screening and electrolyte determination is essential.
Serum calcium level of 9 is normal.
Low hematocrit and neutrophil count is not a contraindication.
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Research Concepts:
Preoperative Testing:
Hyperkalemia:
Choices:
1. Place a central venous line
2. Attach a pulse oximeter
3. Infuse normal saline
4. Have fresh frozen plasma
Answer: 3 - Infuse normal saline
Explanations:
Erythrocytosis in patients with Eisenmenger can present with many
symptoms including fatigue, paresthesia, headache, and vision problems.
Phlebotomy is recommended but can lead to iron deficiency anemia.
Hydration is recommended in all individuals with a hematocrit above 65
with normal saline being the fluid of choice.
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Research Concepts:
Eisenmenger Syndrome:
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Research Concepts:
Cardiac Cirrhosis:
Choices:
1. Hypertension
2. Hypertrophy
3. Pericarditis
4. Effusion
Answer: 3 - Pericarditis
Explanations:
Dressler syndrome describes pericarditis after an myocardial infarction
It occurs 2 to 3 weeks after myocardial infarction
Presenting symptoms are chest pain and fever
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Research Concepts:
Dressler Syndrome:
Explanations:
The heart (not lung) is protected from rejection in this setting
Routine endomyocardial biopsy is not done
FEV1 is routinely followed in these patients and any suspicion of lung
rejection should be followed by a bronchoscopy possible lavage/biopsy
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Research Concepts:
Heart-Lung Transplantation:
Choices:
1. Sedatives
2. Analgesics
3. Antihypertensives
4. Any medication
Answer: 2 - Analgesics
Explanations:
PCA is the abbreviation for patient-controlled analgesia.
With a PCA machine, the patient can control when they receive doses of
analgesic.
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Research Concepts:
Patient Controlled Anesthesia (PCA):
Choices:
1. Reject borderline surgical candidates
2. Optimize patients with COPD
3. Plan postoperative medications
4. Plan intraoperative care
Answer: 1 - Reject borderline surgical candidates
Explanations:
PFTs should be used to devise a cohesive plan for pulmonary care.
Unless considering a lung resection, they should not be used to discourage a
patient from an operative intervention.
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Research Concepts:
Pulmonary Function Tests:
Choices:
1. HMG-CoA reductase inhibitors
2. Omega-3 Acids
3. Nicotinic acid
4. Fibrates
Answer: 1 - HMG-CoA reductase inhibitors
Explanations:
Nicotinic acid (Niacin) stimulates lipid metabolism, increases HDL while
lowering triglyceride levels but has not been shown to reduce myocardial
infarctions
Statin medications also lower triglycerides and LDL while raising HDL
levels and have been proven in both primary and secondary prevention
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Research Concepts:
Hyperlipidemia:
Choices:
1. Air
2. Nitrogen bubbles
3. Thrombus
4. Amniotic fluid
Answer: 3 - Thrombus
Explanations:
Thrombi are the most common emboli. Thrombi can form in veins or in the
heart.
Atrial fibrillation and deep vein thrombi are common causes of emboli.
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Research Concepts:
Thromboembolism:
Choices:
1. Tetralogy of Fallot
2. Complete transposition of the great vessels
3. Ventricular septal defect (VSD)
4. PDA
Answer: 3 - Ventricular septal defect (VSD)
Explanations:
VSD presents with a holosystolic murmur, but without cyanosis.
The most common heart defect in childhood is VSD. The majority of cases
are asymptomatic soon after birth.
The majority of small muscular VSDs close by 12 months. In asymptomatic
patients, observation is recommended.
A VSD occuring after an acute MI is often lethal. Surgery is the only life
saving treatment.
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Research Concepts:
Ventricular Septal Defect:
Choices:
1. Repeat epinephrine for total of 3 rounds
2. Administration of atropine
3. Administration of dobutamine
4. All of the above
Answer: 2 - Administration of atropine
Explanations:
In pediatric bradycardia, atropine should be administered if no response to
epinephrine
Atropine may be repeated only once in pediatric bradycardia
Epinephrine (1:10,000) may be administered every 3 to 5 minutes
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Research Concepts:
Bradycardia:
Choices:
1. Hypertension
2. Pulmonary fibrosis
3. Aortic aneurysm
4. Peripheral vascular disease
Answer: 3 - Aortic aneurysm
Explanations:
The Oliver sign is a downward tug of the trachea during systole.
It is a positive sign for an aortic arch aneurysm.
Echocardiogram is indicated.
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Research Concepts:
Aortic Aneurysm:
Oliver Sign:
Choices:
1. Right at the point of maximal impulse
2. 1 cm above the inguinal ligament
3. 1 cm below the inguinal ligament
4. Lower in the mid thigh
Answer: 3 - 1 cm below the inguinal ligament
Explanations:
It is important to insert the cannula 1-2 cm below the inguinal ligament.
The reason for this is that if there is bleeding the artery can be compressed
Above the inguinal ligament, the femoral artery cannot be compressed and
bleeding can occur in the retroperitoneal space
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Research Concepts:
Arterial Cannulation:
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Research Concepts:
Aspirin:
Choices:
1. Adherence
2. Degranulation
3. Apoptosis
4. Aggregation
Answer: 3 - Apoptosis
Explanations:
The normal functions of platelets are to adhere, aggregate, and degranulate
They can be activated directly through glycoprotein VI of collagen or
indirectly by von Willebrand factor binding to glycoprotein 1b
Platelet granules have alpha granules containing multiple vasoactive
factors, delta granules containing ATP, calcium, and serotonin, and lambda
granules containing hydrolytic enzymes
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Research Concepts:
Platelets:
Choices:
1. 5%
2. 10%
3. 25%
4. 50%
Answer: 4 - 50%
Explanations:
Once patients with AS has develop congestive heart failure, 50% will die
within 2 years
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Research Concepts:
Aortic Stenosis:
Aortic Stenosis:
Choices:
1. 4-6 hrs
2. 12 hrs
3. 24 hrs
4. 1 hr
Answer: 1 - 4-6 hrs
Explanations:
After starting heparin, the PTT is monitored every 4-6 hrs for the first 24
hours.
When the PTT is therapeutic between 55-70 seconds, the PTT can me
monitored on a daily basis.
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Research Concepts:
Anticoagulation:
Choices:
1. A sudden drop in serum potassium levels
2. Sodium and potassium retention
3. Potential lethal cardiac dysrhythmias due to hypokalemia
4. Sodium and water excretion and potassium retention
Answer: 4 - Sodium and water excretion and potassium retention
Explanations:
You will anticipate sodium and water excretion and potassium retention in
patients taking spironolactone (Aldactone). Spironolactone (Aldactone)
does not cause potassium excretion, as do loop diuretics.
It is referred to as a potassium-sparing diuretic. Hypokalemia or a drop in
serum potassium levels are not expected with potassium-sparing diuretics
such as Aldactone.
Sodium and water are excreted, not retained. Cardiac dysrhythmia should
not occur because of hypokalemia, since potassium is not excreted.
Patient Need: Physiological Integrity
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Research Concepts:
Potassium Sparing Diuretics:
Choices:
1. Nerve, artery, vein
2. Nerve, vein, artery
3. Vein, artery, nerve
4. Vein, nerve, artery
Answer: 1 - Nerve, artery, vein
Explanations:
The neurovascular bundle is important in the femoral triangle because
femoral punctures are commonly performed in the hospital
The femoral nerve is always lateral to the artery
Femoral venipunctures are done by palpating the pulse and placing the
needle about 1 cm medially
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Research Concepts:
Femoral Triangle:
Choices:
1. Clonidine
2. Methyl dopa
3. Hydralazine
4. Minoxidil
Answer: 4 - Minoxidil
Explanations:
Minoxidil is a vasodilator which works by opening the potassium channels
The drug causes hyperpolarization of the cell membranes
It is widely used for alopecia but does not work. The maximum growth of
hair is probably a few hair strands after a few years
Common side effects include itching, redness or irritation at site of
application
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Research Concepts:
Minoxidil:
Choices:
1. Doppler ultrasound
2. Measure levels of D-dimer
3. Start warfarin
4. Angiogram
Answer: 4 - Angiogram
Explanations:
Spiral CT is an initial study.
Arteriogram is indicated when initial studies are inconclusive.
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Research Concepts:
Pulmonary Embolism:
Choices:
1. Cannulate the groins
2. Accomplish ventricular fibrillation and hypothermia
3. Give only retrograde cardioplegia
4. Perform endarterectomy of aorta
Answer: 3 - Give only retrograde cardioplegia
Explanations:
Before cardioplegia is administered, the aorta must be cross clamped
If the aorta is calcified it should never be cross clamped
If the aorta is calcified the options are off pump CABG, using the internal
mammary arteries as sites of proximal anastomosis, fibrillatory arrest,
femoral cannulation, circulatory arrest, or either replacement or
endarterectomy of the aorta
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Research Concepts:
Coronary Artery Bypass Graft:
Aortic Calcification:
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Research Concepts:
Right Axis Deviation:
Choices:
1. It is the major motor nerve of the larynx
2. It innervates the cricothyroid muscles
3. It is the major sensory nerve of the larynx and below
4. It is a branch of the vagus nerve
Answer: 2 - It innervates the cricothyroid muscles
Explanations:
The recurrent laryngeal nerve supplies the sensory innervation to the
laryngeal mucosa and below.
It also is the motor nerve of the larynx, but it does not innervate the
cricothyroid muscles. They are the only laryngeal muscles supplied by the
external branch of the superior laryngeal nerve, which is a branch of the
vagus nerve.
The recurrent laryngeal nerves are branches of the vagus nerve.
They are called recurrent because they travel in a reverse direction to the
vagus nerve.
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Research Concepts:
Recurrent Laryngeal Nerve:
Choices:
1. Bleomycin
2. Taxol
3. Asparaginase
4. Doxorubicin
Answer: 4 - Doxorubicin
Explanations:
Doxorubicin is an anthracycline antibiotic used to treat a variety of cancers.
Doxorubicin works by intercalating DNA.
The drug is administered intravenously and has several side effects.
Cumulative doses can cause cardiac side effects which can lead to CHF and
dilated cardiomyopathy. The damage to the heart is due to free radical.
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Research Concepts:
Doxorubicin:
Choices:
1. 1 week
2. 1 month
3. 3-6 months
4. 24 months
Answer: 4 - 24 months
Explanations:
Many physicians forget the importance of compression stockings in patients
with a DVT.
Compression stockings can help prevent the post phlebitic syndrome.
The compressions stocking should be worn for at least two years to be of
benefit.
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Research Concepts:
Deep Vein Thrombosis:
Choices:
1. Paradoxical embolism
2. Pulmonary hypertension
3. Atrial arrhythmias
4. Calcific aortic stenosis
Answer: 4 - Calcific aortic stenosis
Explanations:
A significant atrial septal defect could result in paradoxical systemic
emboli, pulmonary hypertension, congestive heart failure, atrial
enlargement, and atrial arrhythmias
There is no association with calcific aortic stenosis
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Research Concepts:
Atrial Septal Defect:
Choices:
1. Clonidine
2. Prazosin
3. Labetalol
4. Vasotec
Answer: 1 - Clonidine
Explanations:
Rebound hypertension does occur if there is abrupt discontinuation of
clonidine.
Clonidine should be tapered slowly.
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Research Concepts:
Clonidine:
Choices:
1. Lead V1
2. Lead V4
3. AVL
4. AVF
Answer: 2 - Lead V4
Explanations:
Right ventricular infarction will show ECG changes in lead V3 and V4
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Research Concepts:
Right Ventricular Infarction:
Explanations:
Nitroglycerin may be repeated at 5 minute intervals for as long as BP is
maintained
Starting dose for nitroglycerin is 10 ug/min
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Research Concepts:
Acute Myocardial Infarction:
Choices:
1. Asymmetrical chest expansion
2. Decreased air entry
3. Increased tactile fremitus
4. Dull percussion
Answer: 3 - Increased tactile fremitus
Explanations:
Chest expansion can be asymmetrical and chest lag can be seen.
Air entry is decreased and the percussion tone becomes dull.
Tactile fremitus in increased when there is pneumothorax and decreased
with a pleural effusion.
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Research Concepts:
Effusion, Pleural:
Choices:
1. Left heart failure
2. Right heart failure
3. Aortic stenosis
4. Mitral stenosis
Answer: 2 - Right heart failure
Explanations:
Peripheral edema is a sign of right heart failure
Left heart failure can cause pulmonary edema
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Research Concepts:
Heart Failure, Congestive:
Choices:
1. Regular medication schedule
2. Use of cardiac rehabilitation
3. Use of ventricular assist device
4. External pacemaker
Answer: 3 - Use of ventricular assist device
Explanations:
Patients who's hearts are getting worse before there is an available heart can
be offered a ventricular assistive device
Cardiac rehabilitation and continuing regular medications would not be
helpful with a deteriorating heart condition
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Research Concepts:
Cardiomyopathy, Dilated:
Choices:
1. The patient has a history of allergy to contrast products
2. The patient has a pacemaker
3. The procedure is revision endoscopic sinus surgery with distorted anatomy
anticipated
4. None of the above
Answer: 4 - None of the above
Explanations:
IGS has virtually no contraindication.
No contrast injection is required. No interference is to be feared with
implantable devices or prostheses, even by electromagnetic IGS systems.
An up-to-date preoperative CT scan is always a prerequisite of IGS,
regardless of the extent of pre-existing anatomical distortion.
The issue of head movements during surgery is also eliminated by the use
of a specific headset during image acquisition for automated registration.
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Research Concepts:
Image-Guided Surgery:
Choices:
1. Longer duration
2. Bleeding
3. Hematoma
4. Preoperative antibiotics
Answer: 4 - Preoperative antibiotics
Explanations:
Preoperative antibiotics can decrease the risk of infection after surgery
Hematoma, longer surgery, bleeding, and use of foreign material are all risk
factors for infection
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Research Concepts:
Post-op Wound Infection:
Choices:
1. Increase preload and decrease afterload
2. Decrease preload and increase afterload
3. Decrease in both preload and afterload
4. Increase in both preload and afterload
Answer: 3 - Decrease in both preload and afterload
Explanations:
Nesiritide is a recombinant human brain natriuretic peptide
It causes both arterial and venous vasodilation
It is used in treatment of acute decompensated heart failure
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Research Concepts:
Nesiritide:
Choices:
1. Bradykinin
2. Thromboxane
3. Nitric oxide
4. Angiotensin
Answer: 3 - Nitric oxide
Explanations:
The blood vessels endothelium utilize nitric oxide as a signal to relax
surrounding smooth muscle, dilating the artery resulting in increased blood
flow.
The actions of nitrates including nitroglycerin involve this mechanism.
These compounds are converted to nitric oxide.
This is the pathophysiology in treatment of coronary artery disease.
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Research Concepts:
Vasodilation:
Choices:
1. Colon cancer
2. Lung cancer
3. Skin cancer
4. Blood cancer
Answer: 3 - Skin cancer
Explanations:
Transplant recipients are at high risk for cancer because of
immunosuppression, chronic antigenemia, susceptibility to oncogenic
viruses, and use of potent drugs.
Cancers of the colon, lung, bladder, and prostate do occur.
The risk of cancer is highest for the skin, lip, and kidney, and for
lymphomas.
Surveillance is necessary for all patients who undergo transplant. All
suspicious lesions must be biopsied.
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Research Concepts:
Posttransplant Cancer:
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Research Concepts:
Dextran:
Choices:
1. Quinidine
2. Mexiletine
3. Flecainide
4. Phenytoin
Answer: 3 - Flecainide
Explanations:
Flecainide is a class IC drug
It has the highest potency
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Research Concepts:
Flecainide:
Choices:
1. Intravenous
2. Oral
3. Sublingual
4. Transdermal
Answer: 3 - Sublingual
Explanations:
Sublingual nitroglycerin has a faster onset of action than oral and
transdermal forms.
Sublingual and intravenous nitroglycerin have a similar onset of action.
However, it takes longer to administer intravenous nitroglycerin because it
requires an intravenous infusion to be set up.
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Research Concepts:
Myocardial Infarction, Acute:
Nitroglycerin:
Choices:
1. Start methylprednisolone IV
2. Evaluate patient for cytomegalovirus infection
3. Possible acute rejection
4. Patient may need liver biopsy
Answer: 1 - Start methylprednisolone IV
Explanations:
Endomyocardial biopsy must be performed to rule out acute rejection
Although methylprednisolone is first line for acute rejection, it should be
delayed until confirmation from biopsy
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Research Concepts:
Heart Transplantation:
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Research Concepts:
Prescriptions:
Choices:
1. Normal diaphragm movement
2. Barrel chest deformity
3. Increased tactile fremitus
4. Normal lung sounds
Answer: 2 - Barrel chest deformity
Explanations:
Barrel chest deformity refers to increased A-P diameters in individuals with
COPD
A-P to transverse diameter is close to 1:1 with barrel chest deformity
Other physical findings could include distant lung sounds, decreased
diaphragm movement and decreased tactile fremitus
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Research Concepts:
Obstructive Pulmonary Disease, Chronic (COPD):
Barrel Chest:
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Research Concepts:
Pulmonic Stenosis:
Choices:
1. Vitamin deficiency
2. Ischemia
3. Infection
4. Blood transfusion
Answer: 4 - Blood transfusion
Explanations:
Blood transfusion may aid healing of a wound if there was anemia
Deficiency of vitamins C and E would slow wound healing
Infections and ischemia will delay or prevent wound healing
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Research Concepts:
Wound Healing:
Choices:
1. Hydrocolloid dressing
2. Oral antibiotics
3. Hydrotherapy
4. Avoiding pressure
Answer: 4 - Avoiding pressure
Explanations:
Decubitus ulcers are caused by pressure leading to ischemia
Frequent turning of immobilized patients is needed for prevention
Once an ulcer has formed, avoidance of pressure over the area is needed for
healing
The area should be kept clean and moist, so hydrocolloid dressings can be
helpful
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Research Concepts:
Decubitus Ulcers:
Explanations:
Acute asthma, COPD, cardiac tamponade, superior vena cava syndrome can
all cause pulsus paradoxus
The physical finding consists of a greater than 10 mm Hg drop in systolic
blood pressure during inspiration
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Research Concepts:
Pulsus Paradoxus:
Choices:
1. Fresh-frozen plasma and cryoprecipitate
2. Desmopressin
3. Erythropoietin
4. Synthetic factor VIII
Answer: 4 - Synthetic factor VIII
Explanations:
Hemophilia A is a coagulation disorder resulting from a deficiency or
abnormality of factor VIII. Although FFP contains factor VIII, the levels
are too low to prevent or control bleeding in hemophilia.
Desmopressin (DDAVP) is a synthetic analogue of anti-diuretic hormone
that increases levels of factor VIII and von Willebrand factor. DDAVP can
be used alone for mild hemophilia A, but it is ineffective in severe forms of
the disease.
Erythropoietin does not prevent bleeding complications in hemophilia.
Pooled concentrated or recombinant factor VIII is given before surgery
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Research Concepts:
Hemophilia A:
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Research Concepts:
Tetralogy Of Fallot:
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Research Concepts:
Local Anesthetics:
Choices:
1. Dobutamine
2. Digitalis
3. Quinidine
4. Lidocaine
Answer: 4 - Lidocaine
Explanations:
Lidocaine is a class IB antiarrhythmic with low incidence of toxicity
It has high degree of effectiveness in arrhythmias associated with acute
myocardial infarction
Lidocaine acts by blocking activated and inactivated sodium channels
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Research Concepts:
Lidocaine:
Ventricular Tachycardia:
Tap flag to report any problems with this question.
Question 521: Which of the following side effects is seen with the use of
ticarcillin?
Choices:
1. Fulminant liver failure
2. Drug-induced lupus
3. Hematologic abnormalities
4. Nephrotoxicity
Answer: 3 - Hematologic abnormalities
Explanations:
Ticarcillin works just like other penicillin by inhibiting bacterial cell wall
synthesis by binding to one or more of the penicillin binding proteins
Hematologic abnormalities such as bleeding or eosinophilia occur with the
use of this drug
Positive Coombs' reaction and abnormal coagulation profiles may also
occur
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Research Concepts:
Ticarcillin/Clavulanate:
Choices:
1. Metoprolol
2. Clonidine
3. Furosemide
4. Captopril
Answer: 1 - Metoprolol
Explanations:
Post MI, beta blockers should be initiated.
Moreover, one should not forget to add aspirin to the regimen.
If there is left ventricular dysfunction, an ACE inhibitor should be started.
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Research Concepts:
Myocardial Infarction, Acute:
Choices:
1. Increased secretions
2. Endotracheal tube cuff leak
3. Uncontrolled pain
4. Coughing
Answer: 2 - Endotracheal tube cuff leak
Explanations:
The low-pressure alarm is an indicator that the patient is disconnected from
the ventilator.
He or she is not receiving the benefit of the ventilator.
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Research Concepts:
Mechanical Ventilation:
Choices:
1. Sepsis
2. Recent surgery
3. Right heart strain
4. Patient is allergic to heparin
Answer: 3 - Right heart strain
Explanations:
To date, thrombolytic therapy has not proven to improve morbidity or
mortality in patients with PE.
Thrombolytic therapy is only indicated in patients with hemodynamic
instability or right ventricular dysfunction.
The therapy must be started within the first 24 hours to resolve the
thrombus.
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Research Concepts:
Pulmonary Embolism:
Choices:
1. 10%
2. 30%
3. 40%
4. >50%
Answer: 4 - >50%
Explanations:
>50% of all elderly do not complain of chest pain while an AMI is evolving
Neuropathy prevents them from sensing the pain of AMI
The phenomenon is especially true of the elderly with diabetes mellitus
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Research Concepts:
Acute Myocardial Infarction:
Choices:
1. Preload
2. Afterload
3. Resistance
4. Contractility
Answer: 1 - Preload
Explanations:
Preload is the predominant factor for myocardial fiber length.
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Research Concepts:
Cardiac Physiology:
Choices:
1. CT of chest
2. ECHO
3. ECG monitoring x 24 hrs
4. Cardiac enzymes
Answer: 3 - ECG monitoring x 24 hrs
Explanations:
There is a poor correlation between cardiac enzymes and contusion. Thus
the enzymes are not part of an investigation.
Patients with cardiac contusion are best monitored by 24 hour ECG
monitoring. A normal ECG at admission makes cardiac contusion very
unlikely.
Echo has been used to assess cardiac wall abnormalities to exclude lesions
that may require surgery.
Sometimes sternal fractures are associated with cardiac contusion.
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Research Concepts:
Cardiac Contusion:
Choices:
1. Hypotension and bradycardia
2. PR prolongation
3. QRS prolongation
4. Hyperglycemia
Answer: 4 - Hyperglycemia
Explanations:
EKG will show PR and QRS prolongation
Hypotension and bradycardia is a common finding in beta-blocker overdose
Hypoglycemia, rather than hyperglycemia, is commonly seen in such cases
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Research Concepts:
Toxic, Beta-Blocker:
Choices:
1. PR prolongation is a common finding
2. Only half of patients will have symptoms
3. Seventy percent of these cases are associated with underlying cardiac
disease
4. Wide complex tachycardias are the most common presentation
Answer: 2 - Only half of patients will have symptoms
Explanations:
WPW syndrome is the most common accessory pathway syndrome
Classically the PR interval is shortened and a slurring of the upstroke of the
QRS complex occurs, called a delta wave
Only half of WPW patients ever experience symptoms
The most common symptoms are related to supraventricular tachycardia
due to reentry
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Research Concepts:
Wolff-Parkinson-White Syndrome:
Choices:
1. Aspirin
2. Indomethacin
3. Celebrex
4. Ibuprofen
Answer: 2 - Indomethacin
Explanations:
Indomethacin is the drug often used to close the patent ductus arteriosus.
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Research Concepts:
Patent Ductus Arteriosus:
Choices:
1. Good sterile barrier
2. Use of povidone iodine over chlorhexidine
3. Use of antibiotic impregnated catheters
4. Proper dressing at entry site
Answer: 2 - Use of povidone iodine over chlorhexidine
Explanations:
Infection rate is lower with chlorhexidine than povidone iodine solution.
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Research Concepts:
Central Venous Catheter:
Choices:
1. Coronary artery bypass graft (CABG)
2. Antibiotics prior to dental procedures
3. Doppler echocardiography
4. None of the above
Answer: 3 - Doppler echocardiography
Explanations:
The murmur of aortic stenosis is classically mid-systolic heard best at 2nd
intercostal space and radiating to the neck
Doppler echocardiography is the imaging modality of choice to diagnose
and estimate severity of disease
Antibiotics prior to dental procedure are usually recommended to those
with mitral valve prolapse with valvular regurgitation
CABG is not an appropriate procedure in this patient
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Research Concepts:
Aortic Stenosis:
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Angina:
Choices:
1. Rheumatic heart disease is associated with 5 percent of the patients
2. Congenital bicuspid valve is the most common cause
3. ECG may show ST segment depression
4. Patient may experience exertional angina
Answer: 2 - Congenital bicuspid valve is the most common cause
Explanations:
Congenital bicuspid valve is the number one cause of AS
Second most common cause is rheumatic heart disease, which is associated
with 2 percent of the population
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Research Concepts:
Aortic Stenosis:
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Research Concepts:
Treprostinil:
Pulmonary Hypertension:
Choices:
1. Asthma
2. Left ventricular dysfunction
3. Second degree AV block
4. Pulse less than 60 per minute
Answer: 4 - Pulse less than 60 per minute
Explanations:
Due to its mortality reduction, beta blockers are indicated in most patients
with AMI
Contraindicated of BB are second-degree AV block, COPD, and heart rate
less than 60 per minute
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Research Concepts:
Beta-Blockers:
Choices:
1. Active range of motion of the upper extremities
2. High-level exercise
3. Ambulation in the halls
4. Bed positioning to avoid skin breakdown
Answer: 2 - High-level exercise
Explanations:
Pericarditis is a contraindication for high-level exercise
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Research Concepts:
Pericarditis:
Choices:
1. Heparin GTT and Plavix 75 mg qd
2. Aspirin 325 mg PO qd with warfarin titrated to INR of >3.0
3. Plavix 75 mg qd PO with warfarin titrated to INR of >2.0
4. Enoxaparin at 1 mg/kg SC with warfarin titrated to INR of 2.0 to 2.5
Answer: 4 - Enoxaparin at 1 mg/kg SC with warfarin titrated to INR of 2.0
to 2.5
Explanations:
The patient needs to become therapeutic with a heparin gtt or enoxaparin
followed by warfarin with an INR of 2.0 to 2.5 for 3-6 months.
DVT prophylaxis is Heparin 5000 U SQ BID or TID, or Enoxaparin 30 to
40 mg SQ daily or BID.
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Research Concepts:
Deep Venous Thrombosis, Lower Extremity:
Choices:
1. It is 20 times less
2. It is 2 times more
3. It is equal to
4. It is 200 times less
Answer: 1 - It is 20 times less
Explanations:
Background radiation varies by elevation from sea level. On average in
North America it is 3 mSv (.3 Rem)
A PA/Lat CXR exposes the patient to 0.15 mSv (15 mRem)
The CXR is exposes patients to less ionizing radiation than virtually any
other imaging study using ionizing radiation.
It takes less ionizing radiation to penetrate lung than soft tissue or bone.
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Research Concepts:
Chest Radiographs:
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Research Concepts:
Mitral Stenosis:
Choices:
1. Heart rate
2. Mental status
3. Constipation
4. Respiratory status
Answer: 4 - Respiratory status
Explanations:
Patients who receive IV morphine are usually monitored with regard to
their respiratory status utilizing pulse oximetry
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Research Concepts:
Morphine:
Choices:
1. Alphamethyldopa
2. Labetalol
3. Verapamil
4. Captopril
Answer: 4 - Captopril
Explanations:
Captopril and other ACE inhibitors are considered teratogenic
Their use is contraindicated in pregnancy
Methyldopa is a drug frequently used to manage hypertension in pregnant
women
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Research Concepts:
ACE Inhibitors:
Teratogens:
Choices:
1. 25 mL per kg per minute
2. 35 mL per kg per minute
3. 45 mL per kg per minute
4. 55 mL per kg per minute
Answer: 4 - 55 mL per kg per minute
Explanations:
A normal flow rate is 55 mL per kg per minute.
The rate should be adjusted to peripheral resistance.
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Research Concepts:
Cardiopulmonary Bypass:
Choices:
1. Drugs
2. Coxsackie virus
3. Tuberculosis
4. Post myocardial infarction
Answer: 2 - Coxsackie virus
Explanations:
Group B coxsackie viruses are a major cause of myopericarditis
The manifestations of enterovirus caused myocarditis are variable. The
disease is usually very severe and acute in neonates with other general
pathology.
Myocarditis in adults and adolescents is usually benign and follows a
chronic and subacute course. Only a few individuals develop a severe
myocarditis that requires a transplant.
It is thought that the virus may persist after the initial infection and may
cause dilated cardiomyopathy.
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Myocarditis, Viral:
Choices:
1. Gentamicin
2. Cefoxitin
3. Cholestyramine
4. Terbinafine
Answer: 1 - Gentamicin
Explanations:
Gentamicin is usually given in the following dose: 1.5 mg/kg q 8 h or 3
mg/kg q 24 hours
Gentamicin dose calculation should occur in patients with renal dysfunction
Amikacin is not absorbed from the gastrointestinal tract
Terbinafine is a topical antifungal that is not indicated for systemic use
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Research Concepts:
Gentamicin:
Renal Insufficiency:
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Research Concepts:
Aortic Stenosis:
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Research Concepts:
Baroreceptors:
Choices:
1. Metoprolol
2. Quinidine
3. Digoxin
4. Lidocaine
Answer: 3 - Digoxin
Explanations:
Adverse effects of digoxin are more common in the presence of
hypokalemia.
Additionally hypercalcemia may also increase arrhythmias including
bigeminy and ventricular tachycardia.
Other adverse effects of digoxin include nausea, vomiting, and diarrhea.
At higher doses, digoxin can cause confusion, amnesia, dizziness, and
yellowish green halos.
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Research Concepts:
Hypokalemia:
Digoxin:
Explanations:
Advanced directives may take several forms; they may designate who may
make health care decisions, establish a living will, and DNR status
They are recognized most but not all states
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Research Concepts:
Advanced Directives:
Choices:
1. <200 mg/dL
2. <100 mg/dL
3. <130 mg/dL
4. <50 mg/dL
Answer: 2 - <100 mg/dL
Explanations:
LDL-C lowering therapy greatly reduces risk for major coronary events and
strokes in those with CAD and CAD risk equivalents
The recommended LDL-C goal in high-risk patients is <100 mg/dL
An LDL-C lowering drug will be required to achieve levels <100 mg/dL in
addition to lifestyle changes
Recent clinical evidence advocates an LDL-C<70 mg/dL as a therapeutic
option for very high-risk patients
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Research Concepts:
Myocardial Infarction:
Choices:
1. HDL
2. IDL
3. VLDL
4. LDL
Answer: 4 - LDL
Explanations:
Of all the lipoproteins, LDL (also referred to as "bad cholesterol") has the
greatest cholesterol component and serves in transporting cholesterol from
the liver to other body tissues.
HDL (also referred to as "good cholesterol") carries cholesterol from other
body parts back to the liver.
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Research Concepts:
Low Density Lipoprotein:
Choices:
1. At the time of diagnosis
2. About 1 year of age
3. After placement of a BT shunt
4. Between the ages of 3-6
Answer: 2 - About 1 year of age
Explanations:
The timing of surgery for TOF is slightly controversial. Good results can be
achieved in selected patients in all ages
The current trend is to repair most asymptomatic TOF when a child is about
1 year of age
Complete repair in symptomatic infants is carried out earlier if the infant is
over 6 kg, has adequate size pulmonary arteries, absence of multiple VSD,
AV septal defect, or pulmonary atresia
The presence of an anomalous coronary artery crossing the right ventricular
outflow tract might lead to deferral of surgery to about 2 years
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Research Concepts:
Tetralogy Of Fallot:
Choices:
1. Sequential Compression Devices
2. Aspirin
3. Low molecular weight heparin
4. Warfarin
Answer: 3 - Low molecular weight heparin
Explanations:
Low molecular weight heparin has been shown to be effective in DVT
prevention
Warfarin has more side effects and has a higher risk of intracranial bleeding
SCDs and aspirin are not sufficient for DVT prevention
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Research Concepts:
Deep Venous Thrombosis Prophylaxis:
Choices:
1. 37 degree F
2. 60 degree F
3. 100 degree F
4. 120 degree F
Answer: 3 - 100 degree F
Explanations:
Blood product should be warmed to 100 degree F prior administration to
prevent hypothermia and acidosis.
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Research Concepts:
Blood Transfusion:
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Research Concepts:
Potassium Sparing Diuretics:
Choices:
1. Ventricular septal defect
2. Atrial septal defect
3. Patent ductus arteriosus
4. Coarctation of the aorta
Answer: 3 - Patent ductus arteriosus
Explanations:
The most likely cause is patent ductus arteriosus
Atrial septal defects generally do not cause murmurs in the newborn
Coarctation of the aorta presents as a continuous and/or late systolic
murmur that is best heard posteriorly over the thoracic spine
Stress management is mobilizing resources to meet or exceed the demands
of events and circumstances.
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Research Concepts:
Patent Ductus Arteriosus:
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Research Concepts:
Cardiac Exam:
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Research Concepts:
Intravenous Infiltration:
Choices:
1. Up to 30% of patients may have focal or general neurological signs
2. Acute aortic dissection most commonly presents with an abrupt onset of
"tearing," interscapular or anterior chest pain
3. The incidence of acute myocardial infarction is 1000 times that of aortic
dissection
4. 30% of patients are men under the age of 50
Answer: 4 - 30% of patients are men under the age of 50
Explanations:
20% of patients are males less than 50 years old
Aortic dissection must be considered in the differential diagnosis of acute
chest pain, along with pulmonary embolism, myocardial infarction,
esophageal rupture, and pneumothorax.
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Research Concepts:
Dissection, Aortic:
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Research Concepts:
Heparin Reversal:
Protamine:
Choices:
1. Right atrial enlargement
2. Right lung collapse
3. Left ventricular enlargement
4. Left atrial enlargement
Answer: 3 - Left ventricular enlargement
Explanations:
A normal apical impulse is felt over the apex of the heart
This apical impulse is usually located over the left fifth intercostal space in
the midclavicular line
An apical impulse may be dislocated below the fifth intercostal space in the
presence of left ventricular enlargement
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Research Concepts:
Left Ventricular Enlargement:
Choices:
1. Right sided heart failure
2. Diabetic
3. Oxygen dependent
4. None of the above
Answer: 1 - Right sided heart failure
Explanations:
Right sided heart failure is a contraindication to CCB therapy in PAH
CCBs are widely used in the treatment of PAH
Vasodilator therapy is used where CCBs are contraindicated, ineffective, or
poorly tolerated
Sildenafil, iloprost, and epoprostenol are some vasodilator agents
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Research Concepts:
Pulmonary Hypertension:
Choices:
1. Popliteal artery
2. Abdominal aorta
3. Coronary
4. Iliac artery
Answer: 2 - Abdominal aorta
Explanations:
The most common location of atherosclerosis is the abdominal aorta.
Other sites are the coronaries, popliteal and carotid artery bifurcation.
Location of the pain is determined by the anatomical location of the arterial
lesion.
PVD is most common in the distal superficial femoral artery which
corresponds to claudication in the calf muscle area.
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Research Concepts:
Atherosclerosis:
Choices:
1. Administration of oxygen
2. Chest x-ray (CXR)
3. Anticoagulation
4. Pain medication
Answer: 3 - Anticoagulation
Explanations:
Anticoagulation to prevent further emboli is the most important
intervention when treating PE
CXR is typically not useful in the definitive diagnosis of PE
Administration of O2 has no effect on the hypoxia associated with PE
Doppler ultrasound of lower extremities can establish diagnosis of DVT,
which is often associated with PE
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Research Concepts:
Pulmonary Embolism:
Choices:
1. Intrapericardial epinephrine
2. Synchronized cardioversion
3. Unsynchronized defibrillation
4. Insertion of an AICD
Answer: 3 - Unsynchronized defibrillation
Explanations:
Defibrillation differs in that the shock is not synchronized.
Defibrillation is essential when the rhythm is chaotic and is widely used for
pulse less ventricular tachycardia.
In ventricular fibrillation, patients are generally unconscious and sedation is
not required.
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Research Concepts:
Ventricular Fibrillation:
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Research Concepts:
Mitral Stenosis:
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Research Concepts:
Allergy, Shellfish:
Choices:
1. Aspirin
2. Statins
3. Beta blockers
4. Calcium channel blockers
Answer: 4 - Calcium channel blockers
Explanations:
Risk reduction for patients with known coronary artery disease includes life
style modification and medications
Treatment of hyperlipidemia with statins is important but some patients
required additional treatment for hypertriglyceridemia
Hypertension should be treated with beta blockers and ACE inhibitors
initially
There is no evidence that calcium channel blockers reduce the risk of
cardiac events
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Research Concepts:
Primary And Secondary Prevention Of Coronary Artery
Disease:
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Research Concepts:
High-density Lipoprotein:
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Research Concepts:
Right Ventricular Hypertrophy:
Choices:
1. PDA arising from left main coronary artery
2. PDA arising from left circumflex (LCX) artery
3. PDA arising from right coronary artery (RCA)
4. PDA arising from left anterior descending (LAD) artery
Answer: 2 - PDA arising from left circumflex (LCX) artery
Explanations:
"Left dominant" refers to PDA arising from LCX artery
"Right dominant" refers to PDA arising from RCA
Most often PDA is "right dominant"
LAD and LCX coronary arteries arise at the left main coronary artery
bifurcation
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Research Concepts:
Cardiac Dominance:
Choices:
1. Antiarrhythmic toxicity
2. Gastrointestinal side effects
3. Cataracts
4. Needing a higher dose of medication
Answer: 1 - Antiarrhythmic toxicity
Explanations:
These are side effects of antiarrhythmics that can indicate toxic levels of the
drug
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Research Concepts:
Ibutilide:
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Research Concepts:
Cor Pulmonale:
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Research Concepts:
Neonatal:
Heart Anatomy:
Cardiac Physiology:
Choices:
1. Endocardial cushion defect
2. Hypoplastic left heart syndrome
3. Tetralogy of Fallot
4. Atrial septal defect
Answer: 2 - Hypoplastic left heart syndrome
Explanations:
Hypoplastic left heart syndrome is not commonly seen in patients with
Down syndrome
The most common congenital heart malformations seen in Down syndrome
are ASD, VSD, endocardial cushion defect, tetralogy of Fallot, and
persistent PDA
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Research Concepts:
Congenital Heart Disease:
Down Syndrome:
Choices:
1. Bleeding
2. Sedation
3. Vomiting
4. DVT
Answer: 3 - Vomiting
Explanations:
Nausea and vomiting are the leading reasons for admission post outpatient
surgery.
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Research Concepts:
Vomiting:
General Anesthesia:
Choices:
1. Hypertension
2. Stroke
3. Hypoperfusion
4. Silent seizure
Answer: 3 - Hypoperfusion
Explanations:
Neuropathy after bypass is usually due to hypoperfusion.
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Research Concepts:
Neuropathy:
Cardiopulmonary Bypass:
Choices:
1. Droperidol
2. Ondansetron
3. Morphine
4. Cisplatin
Answer: 1 - Droperidol
Explanations:
Droperidol is an antiemetic that can cause hypotension and tachycardia.
Other potential side effects include restlessness, anxiety, EPS, dystonia,
seizures, QT prolongation, and sedation
Morphine overdose causes bradycardia and hypotension. Ondansetron is a
potent antiemetic.
Cisplatin causes severe nausea and vomiting.
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Research Concepts:
Droperidol:
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Research Concepts:
Defibrillation And Cardioversion:
Arrhythmias:
Choices:
1. Left posterior half of the aorta
2. Right anterior half of the aorta
3. Left anterior half of the aorta
4. Right posterior half of the aorta
Answer: 2 - Right anterior half of the aorta
Explanations:
In the ascending aorta, the false lumen is located in the outer third of the
media and usually involves the right anterior part of the aorta.
The medial third of the ascending aorta is usually normal.
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Research Concepts:
Dissection, Aortic:
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Research Concepts:
Blood Transfusion:
Choices:
1. Ventricular tachycardia
2. Atrial tachycardia
3. Ventricular fibrillation
4. Atrial fibrillation
Answer: 3 - Ventricular fibrillation
Explanations:
Ventricular fibrillation requires immediate defibrillation
Ventricular tachycardia may require cardioversion
Atrial fibrillation may also require cardioversion
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Research Concepts:
Atrial Fibrillation:
Choices:
1. Cor pulmonale
2. CNS emboli
3. Dissecting aortic aneurysm
4. Arrhythmia
Answer: 3 - Dissecting aortic aneurysm
Explanations:
There are many complications of myocardial infarction, and they typically
occur in the first 2-4 days.
Conduction defects are the most common complication, and are observed in
patients that have an inferior wall MI.
Cardiogenic shock occurs when at least 40% of the heart muscle becomes
necrotic. Cardiogenic shock carries a 90% mortality rate.
Other complications include CHF and embolism. Aortic dissection is not a
complication of MI. It is a complication of hypertension and connective
tissue disorders.
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Research Concepts:
Myocardial Infarction:
Choices:
1. Lidocaine
2. Metoprolol
3. Amiodarone
4. Clonidine
Answer: 2 - Metoprolol
Explanations:
Metoprolol is a beta-blocker that is often used to treat people with
hypertension.
Metoprolol is often used to treat people post-myocardial infarction.
Metoprolol is also helpful for the treatment of premature ventricular
contractions.
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Research Concepts:
Premature Ventricular Contraction:
Choices:
1. Ventricular wall thickness
2. Ability of the small arteries and arterioles to constrict
3. Resistance to blood flow in the arterioles
4. The difference in pulse pressure
Answer: 2 - Ability of the small arteries and arterioles to constrict
Explanations:
Systemic vascular resistance = (mean arterial pressure - central venous
pressure) x 80 / cardiac output.
Systemic vascular resistance is a function of small arteriolar, or resistance
arteriolar, tone.
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Research Concepts:
Cardiac Physiology:
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Research Concepts:
Cardioembolic Stroke:
Choices:
1. Arrhythmias
2. Hemomediastinum
3. Thoracic duct injury
4. Tracheal puncture
Answer: 3 - Thoracic duct injury
Explanations:
Numerous complications can result from central line placement, so benefit
must be greater than the risk.
Arrhythmias can occur if the guide wire contacts the endocardium.
Hemomediastinum and pneumothorax can be minimized by using
ultrasound guidance.
The risk of these is higher with catheterization of the subclavian vein than
with right jugular lines.
Injury to the thoracic duct is not seen with right-sided procedures.
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Research Concepts:
Central Venous Access, Internal Jugular Vein, Anterior:
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Research Concepts:
Tension Pneumothorax:
Choices:
1. Mean corpuscular volume (MCV)
2. Total iron binding capacity (TIBC)
3. Ferritin
4. Haptoglobin
Answer: 2 - Total iron binding capacity (TIBC)
Explanations:
Iron deficiency anemia is a microcytic hypochromic anemia
Ferritin and serum iron will be decreased while TIBC will be elevated
Ferritin is the most reliable indicator of iron stores short of bone marrow
aspiration
Haptoglobin is decreased with hemolytic anemias
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Research Concepts:
Iron Deficiency Anemia:
Choices:
1. Digoxin
2. ACE inhibitor
3. Thiazide
4. Nebulizer
Answer: 2 - ACE inhibitor
Explanations:
ACE inhibitors are important in management of congestive heart failure as
they decrease afterload and have been shown to increase survival.
Diuretics may be needed if fluid accumulation becomes a problem.
Spironolactone is indicated in advanced heart failure.
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Research Concepts:
Heart Failure, Congestive:
Choices:
1. CREST syndrome
2. Drug-induced lupus
3. Sjogren's syndrome
4. Systemic lupus erythematosus
Answer: 2 - Drug-induced lupus
Explanations:
Autoantibodies to histones alone suggest drug-induced lupus.
It develops in over half of patients on procainamide.
It also occurs with isoniazid and hydralazine.
Drug induced lupus is usually milder than systemic lupus erythematosus.
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Research Concepts:
Lupus Erythematosus, Drug-Induced:
Choices:
1. Observation
2. Continue medical treatment
3. Stress test
4. Angioplasty
Answer: 4 - Angioplasty
Explanations:
Angioplasty is indicated with medical refractory ischemia
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Research Concepts:
Revascularization Procedures In Coronary Artery
Disease:
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Research Concepts:
Amiodarone:
Choices:
1. Chronic obstructive pulmonary disease
2. Exercise-induced asthma
3. Subcutaneous emphysema
4. Pulmonary embolism
Answer: 4 - Pulmonary embolism
Explanations:
Sign and symptoms of pulmonary embolism include sudden onset of
dyspnea, chest pain, tachypnea, cyanosis, low blood pressure and wheezing.
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Research Concepts:
Pulmonary Embolism:
Choices:
1. Pneumothorax
2. Asthma
3. Pericardial effusion
4. Emphysema
Answer: 3 - Pericardial effusion
Explanations:
Ewart sign is presence of physical findings in patients with fluid collection
around the heart
Dullness to percussion, bronchial breath sounds, and egophony may be best
heard at the tip of left scapula
These finding indicate a large pericardial effusion
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Research Concepts:
Pericardial Effusion:
Choices:
1. Meperidine (Demerol)
2. Metaproterenol (Alupent)
3. Midazolam (Versed)
4. Lorazepam (Ativan)
Answer: 4 - Lorazepam (Ativan)
Explanations:
Long acting benzodiazepines are best in treating DT's, especially patients
with coinciding liver disease
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Research Concepts:
Delirium Tremens:
Choices:
1. "Things will be over soon, don't worry."
2. "This must be very hard for you."
3. "We can't know for sure. Do you have any worries that she is in pain?"
4. "We can never tell."
Answer: 3 - "We can't know for sure. Do you have any worries that she is in
pain?"
Explanations:
The important consideration is why the family member is asking the
question at this point
If there are concerns the patient is uncomfortable or in pain these should be
addressed
Telling the family not to worry is poor advice
It expresses sympathy to recognize that watching a family member die but
does not address their concerns
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Research Concepts:
Colon Cancer:
Hospice Care:
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Research Concepts:
Dobutamine:
Choices:
1. Hyperuricemia
2. Diabetes mellitus
3. Hyperlipidemia
4. Hypertension
Answer: 3 - Hyperlipidemia
Explanations:
HMG-CoA reductase inhibitors are termed statins and are used to treat
hypercholesterolemia.
The statins available for use in the United States are simvastatin (Zocor),
pravastatin (Pravachol), lovastatin (Mevacor), atorvastatin (Lipitor),
fluvastatin (Lescol), and rosuvastatin (Crestor).
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Research Concepts:
Statin Medication:
Choices:
1. Trauma
2. Chronic steroid use
3. Cyanotic heart disease
4. Diabetes
Answer: 3 - Cyanotic heart disease
Explanations:
Cyanotic heart disease is a common cause of multiple brain abscesses in
children.
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Research Concepts:
Cyanotic Heart Disease:
Brain Abscess:
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Research Concepts:
Anaphylaxis:
Choices:
1. Lungs
2. Skin
3. Heart
4. Brain
Answer: 3 - Heart
Explanations:
Aschoff nodules are seen in hearts of patients with rheumatic fever
The nodules result from inflammation and consist of fibrinoid reaction and
inflammatory cells.
Multinucleated giant cells may be seen
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Research Concepts:
Rheumatic Fever, Pathology:
Choices:
1. Hypothyroidism
2. Hemochromatosis
3. Pregnancy
4. Essential hypertension
Answer: 3 - Pregnancy
Explanations:
Other causes of high output failure include hyperthyroidism, anemia, and
Paget disease
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Research Concepts:
High Output Cardiac Failure:
Choices:
1. Left anterior descending
2. Posterior descending
3. Circumflex artery
4. Marginal artery
Answer: 3 - Circumflex artery
Explanations:
The circumflex coronary artery is a branch of the left main coronary artery
It runs in the left coronary sulcus, a groove that separates the left atrium and
left ventricle
It supplies the left atrium and the left ventricle
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Research Concepts:
Heart Anatomy:
Choices:
1. Preoperative antibiotics
2. Long surgery
3. Complicated surgery
4. Use of steroids
Answer: 1 - Preoperative antibiotics
Explanations:
Preoperative antibiotics do not increase the infection rate. All the other
listed factors do.
Systemic factors that increase risk of infection include malnutrition, poor
tissue perfusion, obesity, diabetes, use of steroids, and immunosuppressants
Wound characteristics that increase infection include hematoma, foreign
material, dead space, poor skin preparation, shaving, and use of drains.
Surgery factors which increase infection include poor surgery technique,
long surgery, intraoperative contamination, and inadequate theatre
ventilation.
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Research Concepts:
Postoperative Infection:
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Research Concepts:
Paroxysmal Atrial Fibrillation:
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Research Concepts:
Opiate Overdose:
Naloxone:
Choices:
1. Ticlopidine
2. Warfarin
3. Aspirin
4. Pentoxifylline
Answer: 4 - Pentoxifylline
Explanations:
Daily aspirin therapy is known to reduce the risk of stroke in predisposed
patients.
Patients who have transient ischemic attack are advised to take daily aspirin
to reduce future strokes.
In cases where aspirin is not tolerated ,clopidogrel or ticlopidine are a good
alternatives.
Pentoxifylline does not prevent strokes.
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Research Concepts:
Stroke Prevention:
Explanations:
Hospital acquired pneumonia is associated with an average increased
hospital stay of 7-9 days.
Mechanical ventilation is associated with a 1%-3% daily increase of
infection and is often due aspiration.
Urinary tract infections are the most common nosocomial infection; HAP is
the third most common.
In the USA, the most frequent type of hospital acquired infections are
urinary tract infection (36%), followed by surgical site infection (20%), and
bloodstream infection and pneumonia (both 11%).
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Research Concepts:
Hospital Acquired Pneumonia:
Choices:
1. Family history
2. Sedentary lifestyle
3. Smoking
4. Hypertension
Answer: 3 - Smoking
Explanations:
The risk factor with the strongest association with an abdominal aortic
aneurysm is smoking.
Other risk factors include family history, hypertension, coronary artery
disease, previous aneurysm repair or peripheral aneurysm
Sedentary lifestyle is not a risk factor for AAA
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Research Concepts:
Abdominal Aortic Aneurysm:
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Research Concepts:
Tetralogy Of Fallot:
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Research Concepts:
Streptococcus:
Endocarditis:
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Research Concepts:
Pulse Pressure:
Choices:
1. Liquefactive necrosis
2. Coagulative necrosis
3. Fibrinoid necrosis
4. Suppurative collection
Answer: 2 - Coagulative necrosis
Explanations:
Coagulative necrosis is caused by hypoxic conditions, such as occur in
coronary artery disease.
The hypoxia leads to localized injury to the area supplied by the blood
vessel.
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Research Concepts:
Myocardial Infarction, Acute:
Coagulation Necrosis:
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Research Concepts:
Hypernatremia:
Choices:
1. Calcium
2. Magnesium
3. Phosphorous
4. Sodium
Answer: 2 - Magnesium
Explanations:
Magnesium sulfate can be used for digitalis toxicity.
Fab fragments of digitalis inactivate digitalis in the serum.
Potassium is used to correct hypokalemia associated with digitalis induced
arrhythmias
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Research Concepts:
Digoxin Toxicity:
Choices:
1. Defibrillation with 200J
2. Epinephrine 1 mg IV
3. Amiodarone 300 mg IV
4. Atropine 1 mg IV
Answer: 1 - Defibrillation with 200J
Explanations:
Ventricular fibrillation or pulseless ventricular tachycardia should be treated
with defibrillation starting at 200J then increasing to 300J and then 360J if a
monophasic device is used
Epinephrine is also a treatment but first line is immediate defibrillation
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Research Concepts:
Defibrillation And Cardioversion:
Ventricular Tachycardia:
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Research Concepts:
Shock:
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Research Concepts:
Aortic Regurgitation:
Choices:
1. Failure to achieve stage II of the Bruce protocol
2. ST-segment depression of 1.0 mm
3. ST depression in 1 lead
4. ST depression lasting 1 minute into recovery
Answer: 1 - Failure to achieve stage II of the Bruce protocol
Explanations:
Failure to achieve stage II of the Bruce protocol is a poor prognostic sign.
ST depression more than 2.0 mm, ST depression in more than one lead and
ST depression lasting more than 6 minutes into recovery are all poor
prognostic signs.
Stress testing does not detect significant disease in some cases.
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Research Concepts:
Nuclear Medicine Stress Test:
Choices:
1. Warfarin
2. Aspirin
3. Heparin
4. Hydralazine
Answer: 3 - Heparin
Explanations:
Heparin can induce thrombocytopenia
Lepirudin and argatroban are direct thrombin inhibitors used to treat HIT
It is important to discontinue heparin and heparin flushes.
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Research Concepts:
Thrombocytopenia, Heparin Induced:
Thrombocytopenia:
Choices:
1. Aspirin
2. Warfarin
3. Heparin
4. Alteplase
Answer: 1 - Aspirin
Explanations:
Bleeding time is a function of platelet number and function.
From the above choices, only aspirin can compromise the function of
platelets.
Inhibition of thromboxane-2 by aspirin prevents effective aggregation.
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Research Concepts:
Aspirin:
Bleeding Time:
Choices:
1. Digoxin infusion
2. Heparin anticoagulation
3. Synchronized cardioversion
4. Lidocaine
Answer: 3 - Synchronized cardioversion
Explanations:
The patient most likely has atrial fibrillation with severe hypotension.
In the presence of hemodynamic instability, the best management of atrial
fibrillation is synchronized cardioversion.
Anticoagulation can be started after electric defibrillation.
If it is a chronic atrial fibrillation in a stable patient, anticoagulation should
be started first.
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Research Concepts:
Hypotension:
Atrial Fibrillation:
Choices:
1. The proximity of the IVC to the abdominal wall posteriorly makes the
procedure technically easy
2. Respiratory variation and compressibility of the IVC are not as useful as in
duplex scanning of the femoral system
3. The large caliber of the IVC makes duplex scanning here more reliable than
at the femoral level
4. Only the IVC and iliac systems are visualized with duplex in the abdomen
Answer: 2 - Respiratory variation and compressibility of the IVC are not as
useful as in duplex scanning of the femoral system
Explanations:
The cardiac cycle has more effect than respiratory variation in the IVC
above the renal veins
The IVC is not compressible as the femoral system is
Visualization of dilated collaterals may be of value in diagnosis of IVC
thrombosis
The disadvantages of duplex in this situation include anatomic limitations
and operator dependence
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Research Concepts:
Inferior Vena Caval Thrombosis:
Choices:
1. Anterior mitral leaflet fluttering
2. A mitral regurgitant jet that is eccentric
3. Changes with respirations of the velocity of flow across the mitral valve
4. Ventricular septal defect
Answer: 2 - A mitral regurgitant jet that is eccentric
Explanations:
The patient most likely has chordae rupture of the posterior leaflet mitral
valve
This leaflet is more commonly affected because of its singular blood supply
A flail leaflet produces the musical quality of the murmur
Acute septal perforation causes hypotension and cardiogenic shock
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Research Concepts:
Inferior Wall Myocardial Infarction:
Mitral Regurgitation:
Choices:
1. Idiopathic hypertrophic subaortic stenosis
2. Pulmonic valve stenosis
3. Mitral valve stenosis
4. Tricuspid valve stenosis
Answer: 1 - Idiopathic hypertrophic subaortic stenosis
Explanations:
Idiopathic hypertrophic subaortic stenosis is often asymmetric and is a
common cause of sudden death in young athletes
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Research Concepts:
Hypertrophic Obstructive Cardiomyopathy:
Choices:
1. Hyponatremia
2. Hypokalemia
3. Hypomagnesemia
4. Hypocalcemia
Answer: 2 - Hypokalemia
Explanations:
Spironolactone is a potassium sparing diuretic
Hyponatremia and hypocalcemia can occur with excess use of diuretics
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Research Concepts:
Spironolactone:
Choices:
1. Dilated cardiomyopathy
2. Mitral regurgitation
3. Supraventricular tachycardia
4. Malignant hypertension
Answer: 2 - Mitral regurgitation
Explanations:
The appetite suppressant combination, known as Phen-Fen, was banned
because of its propensity to produce inflammatory mitral valve changes
resulting in severe regurgitation and pulmonary hypertension
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Research Concepts:
Phentermine:
Fenfluramine:
Choices:
1. Ligation of the vessel
2. Extra-anatomic bypass
3. Use of an intraluminal shunt
4. Embolization with fibrin glue
Answer: 3 - Use of an intraluminal shunt
Explanations:
There are many types and sizes of intraluminal shunts available today.
While not widely used, shunts can be very helpful in managing troublesome
bleeding. These shunts can even be left in place for several days.
Packing may help tamponade the bleeding but with active vessel bleeding
more aggressive maneuvers are needed.
Ligation alone always risks the possibility of developing ischemia.
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Research Concepts:
Intraluminal Shunt:
Choices:
1. Carvedilol
2. Terazosin
3. Dobutamine
4. Phentolamine
Answer: 2 - Terazosin
Explanations:
Epinephrine has a stronger action on alpha receptors than beta receptors
Blockage of alpha effect by alpha-blockers leads to unopposed stimulation
of beta receptors
Stimulation of beta receptors by epinephrine can result in vasodilatation and
hypotension
A decrease in blood pressure when epinephrine is administered with alpha
blockers is often called epinephrine reversal
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Research Concepts:
Epinephrine:
Alpha-Blockers:
Choices:
1. In patients with 2 or more vessel disease, exercise testing is contraindicated
2. It should not be done within 5 days of a myocardial infarction
3. Relative contraindications for exercise stress testing can be superseded if
the benefits of exercise testing outweigh the risks
4. Exercise testing in a patient with an ejection fraction less than 25% is
contraindicated
Answer: 3 - Relative contraindications for exercise stress testing can be
superseded if the benefits of exercise testing outweigh the risks
Explanations:
Absolute contraindications for exercise testing include MI in the previous
48 hours, uncontrolled arrhythmias resulting in symptoms or hemodynamic
compromise, severe symptomatic stenosis, uncontrolled angina or failure,
acute PE, and acute aortic dissection.
Relative contraindications include left main stenosis, electrolyte imbalance,
severe hypertension, hypertrophic cardiomyopathy, and high degree
atrioventricular block.
The American Heart Association and the American College of
Cardiologists state that "Relative contraindications for exercise stress
testing can be superseded if the benefits of exercise testing outweigh the
risks".
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Research Concepts:
Treadmill Stress Testing:
Choices:
1. Arterial blood gas
2. Pulmonary angiography
3. Magnetic resonance imaging
4. V/Q scan
Answer: 2 - Pulmonary angiography
Explanations:
Pulmonary arteriogram is the definitive study for pulmonary embolism.
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Research Concepts:
Pulmonary Angiography:
Pulmonary Embolism:
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Research Concepts:
Bile Acid Sequestrant:
Choices:
1. Coffee-ground emesis
2. Black tarry stools
3. Hematemesis
4. Epistaxis
Answer: 4 - Epistaxis
Explanations:
Peptic ulcers are prone to bleeding and perforation
Ulcers on the lesser curvature of the stomach are prone to severe bleeding
Ulcers on greater curvature are prone to perforation
Epistaxis is not a feature of a GI bleeding
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Research Concepts:
Peptic Ulcer Disease:
Choices:
1. Hypertension
2. Aortic stenosis
3. Coronary artery disease
4. Peripheral vascular disease
Answer: 3 - Coronary artery disease
Explanations:
CAD accounts for over 80 percent of sudden cardiac death
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Research Concepts:
Sudden Cardiac Death:
Choices:
1. It wasn't put on ice
2. It was not drawn in a heparinized syringe
3. It was not heated properly
4. None of the above
Answer: 2 - It was not drawn in a heparinized syringe
Explanations:
The ABG sample clotted before analysis because it was not drawn with a
heparinized syringe
It should be placed on ice if it can't be analyzed immediately
Ice retards conversion of O2 to CO2, which should prevent falsely elevated
PCO2 levels causing falsely low pH readings
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Research Concepts:
Arterial Blood Gas:
Clotting Mechanism:
Choices:
1. Hydralazine blocks alpha receptors.
2. Hydralazine increases cyclic AMP.
3. Hydralazine increases nitric oxide levels.
4. Hydralazine blocks beta receptors.
Answer: 3 - Hydralazine increases nitric oxide levels.
Explanations:
Hydralazine acts via direct relaxation of smooth muscle, most likely
involving the nitric oxide system.
Hydralazine can cause a lupus-like effect at high doses.
Hydralazine is acetylated and the dose must be individualized due to
variations in activity of this enzyme.
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Research Concepts:
Antihypertensive Medications:
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Research Concepts:
Antiarrhythmic Medication:
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Research Concepts:
Atropine:
Heart Transplantation:
Choices:
1. Increase the heart rate
2. Reduce myocardial oxygen consumption
3. Increase the blood pressure
4. Lyse thrombus formation
Answer: 2 - Reduce myocardial oxygen consumption
Explanations:
Atenolol (Tenormin) reduces myocardial oxygen demand. It is a beta-
adrenergic blocker and affects the sympathetic nervous system by
decreasing heart rate, blood pressure, and myocardial oxygen demand.
Atenolol will decrease heart rate, not increase it. Atenolol will decrease
blood pressure, not increase it.
Atenolol is a beta-adrenergic blocker, not a thrombolytic.
Pregnancy Category: C Patient Need: Physiological Integrity
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Research Concepts:
Beta-Blockers:
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Research Concepts:
Thrombocytopenia, Heparin Induced:
Choices:
1. Aortic valve endocarditis
2. Patent foramen ovale
3. Pulmonary embolism resulting in hypotension
4. Cerebrovascular and peripheral arterial disease
Answer: 2 - Patent foramen ovale
Explanations:
The patient has deep venous thrombosis and paradoxical emboli
The thromboembolism traveled from the venous system through the patent
foramen ovale to the arterial system
This caused the stroke
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Research Concepts:
Paradoxical Embolism:
Choices:
1. Mild fever
2. Mild chest discomfort
3. Elderly patients are less likely to present with confusion
4. Increase of heart rate
Answer: 3 - Elderly patients are less likely to present with confusion
Explanations:
Elderly patients may present with nonspecific symptoms of low cardiac
output
Acute MI is commonly associated with increased heart rate and mild fever
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Research Concepts:
Acute Myocardial Infarction:
Choices:
1. Calcium
2. Citrate
3. Phosphate
4. Adenine
Answer: 1 - Calcium
Explanations:
PRBC is usually stored for no longer than 30 days
Additive to PRBC includes citrate, phosphate, and adenine
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Research Concepts:
Blood Transfusion:
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Research Concepts:
Saphenous Vein:
Choices:
1. 25 mmHg
2. 35 mmHg
3. 40 mmHg
4. 55 mmHg
Answer: 4 - 55 mmHg
Explanations:
Aortic valve replacement is recommended with pressure gradient above 50
mmHg
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Research Concepts:
Aortic Stenosis:
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Skin Antiseptics:
Choices:
1. Metoprolol
2. Atenolol
3. Esmolol
4. Sotalol
Answer: 4 - Sotalol
Explanations:
Sotalol is in the same anti arrhythmic class drug as Amiodarone.
Sotalol is used in the treatment of ventricular arrhythmias.
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Research Concepts:
Antiarrhythmic Medication:
Choices:
1. It is used to treat congenital diaphragmatic hernias
2. It can be used to treat meconium aspiration
3. It can be used to treat persistent pulmonary hypertension
4. It can be used to treat congenital adenomatoid malformation
Answer: 4 - It can be used to treat congenital adenomatoid malformation
Explanations:
ECMO is not used for congenital adenomatoid malformation.
When used in the arterial-venous form, the carotid artery is ligated at the
end of the procedure.
Heparinization is used and, in neonates, central nervous system hemorrhage
is a major complication.
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Research Concepts:
Extracorporeal Membrane Oxygenation:
Choices:
1. Megaloblastic anemia
2. Aplastic anemia
3. Hypochromic anemia
4. Microcytic anemia
Answer: 1 - Megaloblastic anemia
Explanations:
Nitrous oxide interacts with vitamin B12. B12 is a coenzyme that works
with methionine synthetase.
It has a monovalent cobalt with tetrapyrrole rings.
Nitrous oxide changes the cobalt to bivalent so the activity of methionine
synthetase is decreased.
This causes a megaloblastic anemia.
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Research Concepts:
Megaloblastic Anemia:
Nitrous Oxide:
Choices:
1. ACE inhibitors
2. Calcium channel blockers
3. Diuretics
4. Beta blockers
Answer: 1 - ACE inhibitors
Explanations:
Congestive heart failure was traditionally treated with a positive inotrope,
digoxin, and diuretics
ACE inhibitors have been found to reduce afterload and preload. They can
be used as monotherapy in some patients.
They are also used for patients with recent myocardial infarction.
Patients with the lowest ejection fraction have the best response.
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Research Concepts:
Heart Failure, Congestive:
Choices:
1. It is not used in acute situations
2. It must be taken with milk
3. The onset of action is between 1 to 2 hours
4. It must be given 30 minutes before or 1 hour after meals
Answer: 1 - It is not used in acute situations
Explanations:
Disopyramide (Norpace) is available only in oral form and is therefore not
used in acute situations. Disopyramide (Norpace) blocks sodium channels
(local anesthetic effect) and slows conduction of electrical impulses in the
heart.
It is used to treat ectopic ventricular beats. Side effects include hypotension,
congestive heart failure, worsened or new arrhythmias, nausea, and
vomiting.
Disopyramide (Norpace) should not be taken with food because food may
affect absorption. The onset of action of disopyramide (Norpace) is 0.5 to
3.5 hours.
Plasma levels peak within 2 to 2.5 hours and the effects persist for 1.5 to
8.5 hours after the last dose. Disopyramide (Norpace) should be given on an
empty stomach 1 hour before meals or 2 hours after meals.
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Research Concepts:
Antiarrhythmic Medication:
Choices:
1. Aspirin has been shown to be an effective antiplatelet agent
2. All antiplatelet agents work by inhibiting prostaglandin synthesis
3. Antiplatelet agents must be started 48 hours after surgery for maximal
benefit
4. Aspirin is effective for treatment of deep venous thrombosis
Answer: 1 - Aspirin has been shown to be an effective antiplatelet agent
Explanations:
Thrombotic and embolic events can be prevented by the use of antiplatelet
agents. Studies have shown that strokes in men with carotid artery disease
can be reduced by the use of antiplatelet agents.
Coronary artery bypass grafts are more likely to remain patent if antiplatelet
therapy is started preoperatively and continued long-term.
Aspirin irreversibly inhibits cyclo-oxygenase, but ticlopidine alters the
platelet membrane.
Deep venous thrombosis is not treated with aspirin.
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Research Concepts:
Antiplatelet Medications:
Choices:
1. Plaque rupture
2. Vasospasm
3. Mismatch of supply and demand
4. Occlusive thrombus
Answer: 4 - Occlusive thrombus
Explanations:
The cause of unstable angina is a mismatch of oxygen supply and demand
This can be secondary to plaque rupture, partial occlusion by thrombus, or
vasospasm
Complete occlusion by a thrombus results in infarction, not unstable angina
Stable angina is caused by coronary atherosclerosis
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Research Concepts:
Angina, Unstable:
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Research Concepts:
Effective Dose:
ED50:
Choices:
1. Vagal maneuvers
2. Transvenous pacing
3. Oral beta blocker therapy
4. Holter monitor
Answer: 2 - Transvenous pacing
Explanations:
The wide complex rhythm suggests block below the AV node which is a life
threatening condition.
Immediate pacing is indicated.
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Research Concepts:
Heart Block, Third Degree:
Choices:
1. Factor II
2. Factor VI
3. Factor IX
4. Protein C
Answer: 2 - Factor VI
Explanations:
Clotting factors II, VII, IX, and X are vitamin K dependent
Protein C and S are anticoagulants also dependent on Vitamin K
Protein C has the shortest half-life than other clotting factors
Protein C deficiency is implicated in warfarin induced skin necrosis
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Research Concepts:
Vitamin K:
Clotting Factors:
Choices:
1. Organ donation status
2. Power of attorney
3. Lawyer
4. Driver's license
Answer: 2 - Power of attorney
Explanations:
A power of attorney is important to obtain.
It dictates the further management of this patient.
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Research Concepts:
Power of Attorney:
Choices:
1. Hydromorphone and morphine are equipotent
2. Hydromorphone is approximately 2 times more potent than morphine
3. Hydromorphone is 5 to 8 times more potent than morphine
4. Hydromorphone is 15 to 20 times more potent that morphine
Answer: 3 - Hydromorphone is 5 to 8 times more potent than morphine
Explanations:
Hydromorphone (Dilaudid) is a semi-synthetic derivative of morphine.
It approximately 5 to 8 times more potent than morphine, therefore it must
be given in smaller doses.
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Research Concepts:
Hydromorphone:
Choices:
1. Continue with catheterization to determine coronary artery disease
2. Set the patient for a left thoracotomy
3. Obtain a CT scan to determine the exact dimension of the tear
4. Observe the patient
Answer: 4 - Observe the patient
Explanations:
The catheterization should be cancelled and the patient shoule be observed.
The dissection is small and the patient is asymptomatic. Since the flow of
blood is antegrade this dissected flap will just fold over and close.
However, the patient will need follow-up in the future. For the present, no
interventions are required and catheterization should be repeated at a later
date.
Most iatrogenic dissections in the catheterization lab will close.
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Research Concepts:
Dissection, Aortic:
Choices:
1. Normotension
2. Younger age
3. Normal ejection fraction
4. No CHF
Answer: 1 - Normotension
Explanations:
Blood pressure does not correlate with post PTCA survival
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Research Concepts:
Percutaneous Transluminal Coronary Angioplasty:
Choices:
1. Slow heart rate
2. Bronchoconstriction
3. Impotence
4. Hyperglycemia
Answer: 4 - Hyperglycemia
Explanations:
Beta blockers, such as metoprolol, can worsen pulmonary status in patients
with emphysema, asthma, or chronic bronchitis.
They can also cause symptomatic bradycardia or atrioventricular blocks.
Beta blockers improve quality of life and survival in CHF but acutely can
precipitate the condition.
Sudden discontinuation of beta blockers in patients with CAD can result in
ischemia.
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Research Concepts:
Beta-Blockers:
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Research Concepts:
Xanthelasma:
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Bag Mask Ventilation:
Choices:
1. 1
2. 2
3. 3
4. 4
Answer: 3 - 3
Explanations:
MAT is characterized by atrial rate greater than 100 per minute and the
presence of three morphologies of P waves
and the presence of three morphologies of P waves
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Research Concepts:
Multifocal Atrial Tachycardia:
Choices:
1. Coronary angiogram
2. Stress test
3. ECG plus lipid profile
4. Blood work to rule out thrombotic disorders like protein C and S deficiency
Answer: 3 - ECG plus lipid profile
Explanations:
As in all medical disorders, the basic blood work needs to be ordered.
An ECG will be obtained as a baseline. A lipid profile is essential.
Other blood work may include chemistry and thyroid function tests.
A chest x-ray is performed to look at the heart.
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Research Concepts:
Atherosclerosis:
Choices:
1. Alpha
2. Beta
3. Dopamine
4. Delta
Answer: 4 - Delta
Explanations:
Dopamine at low doses affects the dopamine receptors. This can increase
renal blood flow and improve urine output.
At high doses, dopamine stimulates the beta-receptor.
At very high doses, the alpha-receptors are stimulated.
The renal dopamine dose is 2-5mcq/min/kg.
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Research Concepts:
Inotropes And Vasopressors:
Choices:
1. Prior to a foley catheter placement
2. In mechanically ventilated patients
3. Prior to insertion of a central line
4. To decrease the incidence of surgical site infections prior to elective surgery
Answer: 4 - To decrease the incidence of surgical site infections prior to
elective surgery
Explanations:
Prophylactic antibiotics do not prevent many types of infections such as
urinary tract infections, ventilator-associated pneumonia, or intravenous
line sepsis.
Prophylactic antibiotics are able to decrease the risk of infection in certain
elective surgery procedures.
Prophylactic antibiotics are not recommended for all surgeries and misuse
can lead to the development of resistance.
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Research Concepts:
Preoperative Antibiotics:
Choices:
1. Recurrent ventricular septal defect
2. Pulmonary valve stenosis
3. Pulmonary valve regurgitation
4. Aortic regurgitation
Answer: 3 - Pulmonary valve regurgitation
Explanations:
After TOF repair, any recurrent ventricular septal defects have to be
repaired early, since these patients do not tolerate any residual shunting.
The pulmonary valve stenosis is also repaired early with a patch and/or
valvoplasty. These patients will do poorly if there is any type of right
ventricular outflow tract obstruction.
The most common reason for patients to return as adults after TOF repair is
for pulmonary valve regurgitation. They usually tolerate pulmonary
insufficiency for years, but after a decade or two, patients will return with
symptoms.
These patients now require a homograft to replace the pulmonary valve.
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Research Concepts:
Tetralogy Of Fallot:
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Research Concepts:
Digoxin:
Choices:
1. Alcohol
2. Unprotected anal intercourse
3. Smoking
4. Obesity
Answer: 3 - Smoking
Explanations:
Smoking is closely linked not only with cancer, but also with
cardiovascular, pulmonary, and other systemic diseases.
Numerous cutaneous manifestations result from smoking.
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Research Concepts:
Smoking:
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Research Concepts:
Mitral Valve Prolapse:
Choices:
1. Affinity
2. Bioavailability
3. Efficacy
4. Potency
Answer: 3 - Efficacy
Explanations:
Efficacy refers to the potential maximum therapeutic response that a drug
can produce
Potency refers to the amount of drug needed to produce an effect
Affinity refers to the ability of a drug to bind to receptors and form drug
receptor complex
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Research Concepts:
Efficacy:
Choices:
1. Dyspnea
2. Chest pain
3. Cough
4. Hemoptysis
Answer: 1 - Dyspnea
Explanations:
The PIOPED trial showed that 3 consistent features of PE are dyspnea,
chest pain, and cough.
Less common features of PE include fever, wheezing, abdominal pain, and
syncope.
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Research Concepts:
Pulmonary Embolism:
Choices:
1. Atracurium
2. Succinylcholine
3. Pancuronium
4. Rocuronium
Answer: 2 - Succinylcholine
Explanations:
Succinylcholine, a depolarizing neuromuscular blocker
It initially causes fasciculations because it stimulates the nicotinic
acetylcholine receptors on skeletal muscle
Muscle fasciculations can be observed before the muscle goes into
depolarization block
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Research Concepts:
Succinylcholine:
Choices:
1. Index
2. Inhibition
3. Inflex
4. Intelligent
Answer: 2 - Inhibition
Explanations:
VVI is a ventricular demand inhibited pacemaker.
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Research Concepts:
Pacemaker:
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Calcium Channel blockers:
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Viral Hepatitis:
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Quinidine:
Choices:
1. Revascularization of occluded vessels
2. Improved vasodilatory tone
3. Stabilization of preexisting coronary lesions
4. Reduction of LDL
Answer: 1 - Revascularization of occluded vessels
Explanations:
HMG-Co A reductase inhibitors lower LDL and stabilize preexisting
coronary lesions
They improve vasodilatory tone by modulation of vasodilators from the
endothelium
They probably cause regression of fixed lesions
They are unlikely to open a completely occluded vessel
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Research Concepts:
Statin Medication:
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Femoral Nerve:
Choices:
1. Aortic stenosis
2. Mitral valve prolapse
3. Coarctation of the aorta
4. Left ventricular outflow tract obstruction
Answer: 2 - Mitral valve prolapse
Explanations:
The most common heart lesions with Marfan syndrome include mitral valve
prolapse and dilatation of the aortic root
They are caused by abnormalities in connective tissue as a result of genetic
mutation
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Marfan Syndrome:
Choices:
1. Complete the intended antibiotic course
2. NPO and intravenous fluids
3. Prescribe oral metronidazole
4. Prescribe oral vancomycin
Answer: 3 - Prescribe oral metronidazole
Explanations:
C. difficile infection causes pseudomembranous colitis
This usually follows patients who are taking broad-spectrum antibiotics that
should be discontinued if possible
Diagnosis is made by C. difficile toxin assay or rarely endoscopy
Metronidazole is the treatment of choice for C. difficile infection
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Research Concepts:
Clostridium Difficile Colitis:
Choices:
1. Pneumonia
2. Myocardial infarction (MI)
3. Pulmonary embolus (PE)
4. Pleural effusions
Answer: 3 - Pulmonary embolus (PE)
Explanations:
Virchow triad explains the factors predisposing individuals to PE
Venous stasis can occur with bed rest and immobilization
Hypercoagulability can be inherited or acquired and can occur post-surgery
or post-pregnancy
Trauma to vascular walls is the last of the triad
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Research Concepts:
Pulmonary Embolism:
Choices:
1. Interstitial
2. Intravascular
3. Intracellular
4. Extracellular
Answer: 2 - Intravascular
Explanations:
The intracellular space describes the compartment inside of a cell
Interstitial space describes the compartment between cells
Extracellular describes the compartment outside of a cell
Extracellular is the sum of interstitial plus intravascular
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Research Concepts:
Body Fluids:
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Research Concepts:
Phenoxybenzamine:
Choices:
1. Mechanical ST Jude valve
2. Pulmonary valve
3. Mitral valve
4. Porcine valve
Answer: 2 - Pulmonary valve
Explanations:
In the Ross procedure, the pulmonary valve is transplanted into the aortic
position
The Ross procedure is done in young people but is technically demanding
The pulmonary valve is replaced by a homograft
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Research Concepts:
Aortic Valve:
Choices:
1. Apoptosis
2. Pyknosis
3. Karyorrhexis
4. Vacuolar degeneration
Answer: 4 - Vacuolar degeneration
Explanations:
Apoptosis, pyknosis, and karyorrhexis are signs of irreversible cell injury.
Vacuolar degeneration is the formation of cytoplasmic nonlipid vacuoles
and is not a sign of irreversible cell injury.
Apoptosis is programmed cell death and shows blebbing, nuclear
fragmentation, cell shrinkage, chromosomal DNA fragmentation, and
chromatin condensation.
Pyknosis is condensation of nuclear chromatin.
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Research Concepts:
Cell Death:
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Research Concepts:
Dissection, Aortic:
Choices:
1. Digoxin
2. Amiodarone
3. Pacemaker
4. Lidocaine
Answer: 3 - Pacemaker
Explanations:
Sick sinus syndrome is commonly seen in the elderly due to degenerative
and inflammatory changes in the conduction system of the heart.
The condition manifests with bradycardia-tachycardia syndrome.
Thus, beta blockers help prevent the tachycardia while the pacemaker
prevents bradycardia.
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Research Concepts:
Sick Sinus Syndrome:
Choices:
1. Extensive infection occurs in diabetics
2. Usually the organism invades blood vessels, causing thrombosis and
infarction
3. Cultures are usually negative
4. Immediate treatment with amphotericin prevents the high morbidity
Answer: 4 - Immediate treatment with amphotericin prevents the high
morbidity
Explanations:
Mucormycosis affects rhinocerebral sinuses and pulmonary tissues.
Mucormycosis is seen in diabetics, the immunosuppressed, leukemics, and
neutropenic patients. The fungi appear as right angle-shaped hyphae and
cause thrombosis of blood, leading to infarction and gangrene.
The best treatment for mucormycosis is radical surgical debridement of
infected tissue.
Amphotericin coverage must be used at all times. It carries a high mortality
despite surgery.
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Research Concepts:
Mucormycosis:
Choices:
1. Indomethacin
2. Prostaglandin E infusion
3. Nitric oxide
4. Viagra
Answer: 2 - Prostaglandin E infusion
Explanations:
Some congenital heart diseases are dependent on the patency of the ductus.
Without a patent ductus, some of the cyanotic congenital heart diseases are
not compatible with life.
A prostaglandin E infusion is used to keep the ductus open after birth.
Otherwise, the ductus closes spontaneously within 24 hours after birth.
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Research Concepts:
Congenital Heart Disease:
Choices:
1. Pneumothorax
2. Pneumomediastinum
3. Pleural effusion
4. Perforated organ
Answer: 3 - Pleural effusion
Explanations:
A pleural effusion is often represented by costophrenic angle blunting on a
x-ray
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Research Concepts:
Effusion, Pleural:
Choices:
1. By starting heparin at the time of cannulation
2. By placing a small gauge cannula
3. By doppler assessment of the wrist arteries
4. By placing the line in the brachial artery
Answer: 3 - By doppler assessment of the wrist arteries
Explanations:
In some patients cannulation of the radial artery can lead to ischemia of the
hand.
Therefore, it is essential to perform a Doppler assessment in all individuals
who are going to need a radial artery line.
The palmar arch is not patent, and placement of a radial line can lead to
complications.
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Research Concepts:
Arterial Cannulization:
Choices:
1. Interstitial fibrosis of the lung
2. Myocardial fibrosis
3. Esophagus dysfunction secondary to fibrosis
4. Meningitis
Answer: 4 - Meningitis
Explanations:
Systemic sclerosis is a systemic connective tissue disorder which can affect
almost every organ in the body.
The disorder results in excess collagen deposition in the organs and skin.
Organs affected in systemic sclerosis include the skin, lungs, heart, gut,
kidneys, muscles, joints. and those of the central nervous system.
Renal and lung changes are causes of death in most patients.
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Research Concepts:
Scleroderma:
Choices:
1. Thiazide
2. Clonidine
3. Propranolol
4. Captopril
Answer: 3 - Propranolol
Explanations:
Beta blockers can cause numerous side effects including CNS effects.
Side effects of beta blockers include fatigue, insomnia, and lethargy. Beta
blockers may also decrease libido and cause impotence.
Use of beta blockers has also been known to disturb lipid metabolism by
decreasing HDL levels and increasing triacylglycerols levels.
Abrupt withdrawal may cause rebound hypertension. Patients should be
tapered off beta blockers slowly in order to avoid precipitation of
arrhythmias.
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Research Concepts:
Beta-Blockers:
Choices:
1. Decrease paroxysmal atrial tachycardia
2. Increase diastolic filling time
3. Improve sympathetic response
4. Increase heart rate
Answer: 2 - Increase diastolic filling time
Explanations:
Digitalis enhances contractility by controlling ventricular rate and
increasing diastolic filling time
Paroxysmal atrial tachycardia is a common arrhythmia in digitalis toxicity
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Research Concepts:
Heart Failure, Congestive:
Digoxin:
Choices:
1. 0%
2. 0.5%
3. 1 to 2%
4. 5%
Answer: 3 - 1 to 2%
Explanations:
The incidence of heparin induced thrombocytopenia with low molecular
weight heparin is 1 to 2%
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Research Concepts:
Thrombocytopenia, Heparin Induced:
Choices:
1. Post phlebitis pain
2. Pulmonary embolism
3. Mesenteric insufficiency
4. Myocardial infarction
Answer: 2 - Pulmonary embolism
Explanations:
Pulmonary embolism is the most common serious complication that can
occur with DVT.
Another possibly more serious but uncommon consequence is a paradoxical
embolism, where the embolus crosses through a cardiac defect to the
arterial system. This can result in stroke.
Mesenteric insufficiency may be due to mesenteric arterial or venous
thrombi, but not deep vein (extremity) venous thrombi.
Patients with PE and elevated plasma lactate levels have increased risk of
other complications including mortality independent of other factors.
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Research Concepts:
Pulmonary Embolism:
Choices:
1. It decreases end diastolic volume
2. It decreases cardiac output
3. It decreases mixed venous oxygen
4. It decreases compliance of the left ventricle
Answer: 4 - It decreases compliance of the left ventricle
Explanations:
PEEP increases alveolar surface area for gas exchange, increases functional
residual capacity, and therefore increases arteriolar oxygen tension.
PEEP can decrease cardiac output and ventricular filling pressure.
PEEP does not affect compliance of the left ventricle.
Hemodynamic effects of PEEP can be reversed with fluids.
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Research Concepts:
Positive End-Expiratory Pressure (PEEP):
Choices:
1. Start vasodilators
2. Adjust blood pressure medications
3. Treat all modifiable risk factors
4. Obtain a stress test or an angiogram
Answer: 3 - Treat all modifiable risk factors
Explanations:
Coronary artery disease has many risk factors some of which can be
modified.
Once a diagnosis of CAD is made, it is vital to treat all modifiable risk
factors.
Modifiable risk factors include discontinuing smoking, losing weight,
changing diet, and controlling blood sugar.
Unmodifiable risk factors include age, genes, and gender.
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Research Concepts:
Angina, Stable:
Choices:
1. In a different anatomical site
2. In its anatomical position
3. On top of the previous organ
4. Anywhere where it can function
Answer: 2 - In its anatomical position
Explanations:
Orthotopic transplantation relates to grafting tissue back in the natural
anatomical position.Heterotopic transplantation moves tissue into a
different anatomic location (e.g., transplanting beta pancreatic islet cells
into the forearm.)
Autografts refer to the transplantion of tissue to the same person
Isografts refer to a subset of autografts representing transplants from a
donor to a genetically identical recipient
Xenografts refer to transplants from one species to another.
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Research Concepts:
Transplantation:
Choices:
1. 12 hours
2. 2 days
3. 5 days
4. 7 days
Answer: 4 - 7 days
Explanations:
The effects of aspirin last about 5-7 days in the body.
Most surgeons wait about a week before undertaking any elective surgery.
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Research Concepts:
Aspirin:
Choices:
1. Calcium channels
2. Sodium channels
3. Potassium channels
4. Magnesium channels
Answer: 2 - Sodium channels
Explanations:
Lidocaine is a class I antiarrhythmic drug.
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Research Concepts:
Lidocaine:
Choices:
1. Compensated metabolic alkalosis
2. Uncompensated metabolic acidosis
3. Compensated respiratory acidosis
4. Uncompensated respiratory alkalosis
Answer: 3 - Compensated respiratory acidosis
Explanations:
The ABG is consistent with compensated respiratory acidosis
PCO2 is elevated, which is seen in primary respiratory acidosis and as a
compensatory response to metabolic alkalosis
Elevation of bicarbonate is seen in primary metabolic alkalosis and in a
compensatory response to respiratory acidosis
pH is normal, but leaning toward acidosis and tells us primary disturbance
is acidosis which has been compensated
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Research Concepts:
Respiratory Acidosis:
Choices:
1. Alpha blockers
2. Calcium channel blockers
3. Diuretics
4. Angiotensin converting enzyme (ACE) inhibitors
Answer: 4 - Angiotensin converting enzyme (ACE) inhibitors
Explanations:
ACE Inhibitors have been shown to reduce mortality and morbidity in
congestive heart failure.
ACE inhibitors reduce aldosterone secretion, salt and water retention, and
afterload.
ACE inhibitors are now considered first line drugs for congestive heart
failure.
Beta blockers reduce mortality but are not for use during acute
exacerbations.
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Research Concepts:
Heart Failure, Congestive:
Choices:
1. Second-degree burns
2. Norepinephrine extravasations
3. Fungal infections of the oral mucosa
4. Subcutaneous emphysema
Answer: 2 - Norepinephrine extravasations
Explanations:
Phentolamine mesylate (Regitine) may be prescribed to treat
norepinephrine extravasations (escape of norepinephrine into the tissues).
Administration of phentolamine is the recommended treatment for damage
of surrounding tissue associated with norepinephrine extravasation.
Because norepinephrine (Levophed) has potent vasoconstrictive effects,
tissue ischemia and necrosis may occur if infiltration occurs. The
vasodilatory effect of phentolamine helps prevent such tissue damage.
Second-degree burns are usually treated with anti-infectives. Fungal
infections of the oral mucosa are treated with anti-fungals.
Subcutaneous emphysema is often treated without pharmaceuticals.
Pregnancy Category: C Patient Need: Physiological Integrity
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Research Concepts:
Toxic, Sympathomimetics:
Choices:
1. Captopril
2. Furosemide
3. Metoprolol
4. Minoxidil
Answer: 4 - Minoxidil
Explanations:
Minoxidil is an alpha antagonist and has no role in the treatment of
congestive heart failure.
Minoxidil is used in the treatment of hypertension and has an odd side-
effect of excess hair growth.
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Research Concepts:
Heart Failure, Congestive:
Choices:
1. Nitroglycerin for preload reduction
2. Morphine sulfate
3. Captopril for afterload reduction
4. Loop diuretics (furosemide) for preload reduction (diuresis)
Answer: 2 - Morphine sulfate
Explanations:
Although previously used for cardiogenic pulmonary edema, there is no
good evidence to support the use of morphine sulfate as a preload reducing
agent.
It may, in fact, result in decreased respiratory effort and sedation .
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Research Concepts:
Pulmonary Edema, Cardiogenic:
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Research Concepts:
Torsade de Pointes:
Choices:
1. Dialysis
2. Fluid restriction
3. Diuresis
4. Dose adjustment
Answer: 4 - Dose adjustment
Explanations:
Many drugs are excreted through the kidneys, either as a metabolite or
unchanged
Dose adjustment is important when creatinine clearance reaches at or below
50 ml/min
End stage renal disease is reached when creatinine clearance is below
25ml/min
Fluid restriction, dialysis and diuresis are indicated in patients with renal
failure
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Research Concepts:
Renal Insufficiency:
Choices:
1. 20 minutes
2. 30 minutes
3. 45 minutes
4. 1 hour
Answer: 2 - 30 minutes
Explanations:
AMI is a leading cause of morbidity and mortality in the United States
For AMI, door-to-drug time should be no longer than 30 minutes
Thrombolytic therapy improves survival in ST-segment elevation MI
It is not indicated in the treatment of non-ST-segment elevation MI
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Research Concepts:
Acute Myocardial Infarction:
Thrombolysis:
Choices:
1. Stop preoperatively
2. Stop intraoperatively
3. Stop postoperatively
4. Continue medication
Answer: 4 - Continue medication
Explanations:
Beta-blockers should be continued throughout the procedure
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Research Concepts:
Preoperative Evaluation And Management:
Beta-Blockers:
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Research Concepts:
Internal Mammary Artery Bypass:
Choices:
1. Amlodipine (Norvasc)
2. Lisinopril (Prinivil)
3. Metoprolol (Lopressor)
4. Losartan (Cozaar)
Answer: 1 - Amlodipine (Norvasc)
Explanations:
In African American patients, calcium channel blockers are more effective
at treating refractory hypertension in combination with hydrochlorothiazide.
Beta-blockers, ACE inhibitors and ARBs also treat hypertension and can be
combined with hydrochlorothiazide.
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Research Concepts:
Essential Hypertension:
Choices:
1. Venography
2. Computed tomography angiography (CTA)
3. CXR
4. Ventilation-perfusion (V/Q) scanning
Answer: 2 - Computed tomography angiography (CTA)
Explanations:
The American College of Radiology considers chest CTA the current
standard of care for suspected PE
Venography is utilized in the diagnosis of DVT
A V/Q scan becomes more important when CT scanning is not available or
when there is a contraindication to IV contrast
CXR findings are nonspecific in the diagnosis of PE
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Research Concepts:
Pulmonary Embolism:
Choices:
1. Second intercostal space
2. Third intercostal space
3. Fifth intercostal space
4. Seventh intercostal space
Answer: 3 - Fifth intercostal space
Explanations:
Pericardial effusion is accumulation of fluid in the pericardial cavity.
Percutaneous drainage is most commonly done with ultrasound guidance.
The interspace between the fifth and sixth ribs is used as point for insertion.
More common sites are the subxiphoid or the left sternocostal margin
approach.
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Research Concepts:
Pericardiocentesis:
Choices:
1. Pericarditis
2. Acute myocardial infarction
3. Atrial fibrillation
4. Myxoma
Answer: 2 - Acute myocardial infarction
Explanations:
A mural thrombus is the formation of a thrombus that occurs in contact with
the endocardial lining of the cardiac chamber.
Mural thrombi commonly occur with an acute myocardial infarction.
Mural thrombi may resolve spontaneously, but they can embolize.
A mural thrombus can be confirmed with an echocardiogram.
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Research Concepts:
Mural Thrombi:
Choices:
1. Smoking
2. Hypertension
3. Hyperlipidemia
4. Obesity
Answer: 2 - Hypertension
Explanations:
Over 45, hypertension is the most important risk factor while under 45;
hyperlipidemia is the most important risk factor
Other risk factors include smoking, diabetes mellitus, obesity, and sedentary
lifestyle
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Research Concepts:
Atherosclerosis:
Hypertension:
Choices:
1. Alpha methyldopa
2. Clonidine
3. Propranolol
4. Hydralazine
Answer: 1 - Alpha methyldopa
Explanations:
Alpha methyldopa is known to cause hemolytic anemia.
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Research Concepts:
Hemolytic Anemia:
Antihypertensive Medications:
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Research Concepts:
Warfarin:
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Research Concepts:
Atrioventricular Node:
Choices:
1. Diabetic retinopathy
2. Melanoma of the eye
3. Aortic insufficiency
4. Von economo disease
Answer: 3 - Aortic insufficiency
Explanations:
Becker sign is observation of visible pulsations of retinal arteries.
This sign may be seen in patients with aortic regurgitation and Graves
disease.
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Research Concepts:
Aortic Insufficiency:
Choices:
1. Hyperosmolarity
2. Hypernatremia
3. Cerebral vasoconstriction
4. All of the above
Answer: 4 - All of the above
Explanations:
Currently, the use of sodium bicarbonate during CPR is not routine.
Evidence suggests that sodium bicarbonate can cause hyperosmolarity
hypernatremia, alkalosis, and hyperkalemia.
The alkalosis can result in central vasoconstriction, arrhythmias and left
shift of the oxygen/hemoglobin dissociation curve.
It is used to treat preexisting hyperkalemia or acidosis.
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Research Concepts:
Sodium Bicarbonate:
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Research Concepts:
Warfarin, Drug Interactions:
Choices:
1. Diltiazem
2. Hydralazine
3. Clonidine
4. Nitroprusside
Answer: 3 - Clonidine
Explanations:
Clonidine and alpha methyldopa are two centrally acting agonists.
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Research Concepts:
Clonidine:
Choices:
1. Hypernatremia
2. Hyponatremia
3. Hyperkalemia
4. Hypokalemia
Answer: 3 - Hyperkalemia
Explanations:
Hyperkalemia is potential side effect ACE inhibitors
Inhibition of ACE and reduction in aldosterone production leads to
hyperkalemia
Most diuretics are associated with hypokalemia
Aldosterone antagonist medications also cause hyperkalemia
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Research Concepts:
ACE Inhibitors:
Hyperkalemia:
Choices:
1. Immediate electrical cardioversion
2. IV digoxin
3. IV labetalol
4. IV adenosine
Answer: 4 - IV adenosine
Explanations:
Treatment of choice is adenosine, 6 mg IV, supraventricular tachycardia
followed by a 12 mg dose after a few minutes if needed
IV verapamil is an alternative at 2.5 to 5 mg followed by up to two
additional doses 10 minutes apart if needed
Cardioversion would be indicated if the patient was hemodynamically
unstable
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Research Concepts:
Paroxysmal Atrial Tachycardia:
Choices:
1. Pravastatin
2. Carvedilol
3. Nitroglycerin
4. Hydralazine
Answer: 4 - Hydralazine
Explanations:
Hydralazine can cause drug-induced lupus
Drug induced lupus is uniquely characterized by production of anti-histone
antibodies
Procainamide and isoniazid can also cause similar problem
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Research Concepts:
Hydralazine:
Choices:
1. Pneumothorax
2. Hypercarbia
3. Increased work of breathing
4. Hypoxia
Answer: 3 - Increased work of breathing
Explanations:
Patients on SIMV often attempt spontaneous breathing despite a high
resistance circuit that increases the work of breathing
This can be prevented by setting a respiratory rate to decrease hypercarbia
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Research Concepts:
Synchronized Intermittent Mandatory Ventilation:
Choices:
1. Development of de novo Parkinson disease
2. Malignant hyperthermia syndrome
3. Sepsis
4. Seizure
Answer: 2 - Malignant hyperthermia syndrome
Explanations:
Malignant hyperthermia is an inherited predisposition triggered by
depolarizing muscle relaxants and some anesthetic agents including
halothane.
The condition can occur during anesthesia or a few hours after recovery.
Some patients develop malignant hypertension even though they have
received triggering agents in the past.
The pathophysiology involves reduction in the reuptake of calcium by the
sarcoplasmic reticulum. Termination of muscle contraction is thus impaired.
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Research Concepts:
Malignant Hyperthermia:
Choices:
1. proximal convoluted tubule
2. distal convoluted tubule
3. collecting duct
4. ascending straight tubule
Answer: 2 - distal convoluted tubule
Explanations:
Aldosterone binds to the cells of the collecting tubules inducing proteins
that increase the conductance of the luminal membrane at the sodium
channels
Aldosterone increased the number of Na+/K+ pump sites on the basolateral
membrane and increased formation of ATP by mitochondrial enzymes
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Research Concepts:
Aldosterone:
Renal Physiology:
Choices:
1. Chest x-ray
2. Echocardiogram
3. Quantitative serum prostaglandin assay
4. ECG
Answer: 2 - Echocardiogram
Explanations:
The most appropriate confirmatory test is the echocardiogram
It will also assess for associated cardiac pathology, which is essential in
planning operative care
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Research Concepts:
Patent Ductus Arteriosus:
Choices:
1. Pulmonary embolus (PE)
2. Hyperglycemia
3. Hypovolemia
4. Acidosis
Answer: 2 - Hyperglycemia
Explanations:
Hypoglycemia, not hyperglycemia, can cause PEA.
PE, hypovolemia, and acidosis can cause PEA.
Other causes of PEA include hypoxia, tension pneumothorax, cardiac
tamponade, hypothermia, hyperkalemia, acute myocardial infarction, and
drug overdose.
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Research Concepts:
Pulseless Electrical Activity:
Choices:
1. Paroxysmal atrial tachycardia
2. Wolff-Parkinson-White
3. Torsade de pointes
4. Ventricular tachycardia
Answer: 3 - Torsade de pointes
Explanations:
Torsade is a polymorphic ventricular tachycardia characterized by gradual
changes in amplitude and twisting of the QRS complex.
Torsade is associated with a prolonged QT interval that may be acquired or
congenital.
Torsade can terminate spontaneously, or it can deteriorate into ventricular
fibrillation.
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Research Concepts:
Torsade de Pointes:
Choices:
1. I
2. V2
3. aVL
4. III
Answer: 4 - III
Explanations:
Right coronary artery supplies flow to the inferior portion of the heart.
Inferior leads II, III, and aVF are most likely to be affected.
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Research Concepts:
Inferior Wall Myocardial Infarction:
Choices:
1. Holosystolic murmur
2. A sound heard after systole
3. Presence of air in the mediastinum
4. Crepitus at the lower lung bases
Answer: 3 - Presence of air in the mediastinum
Explanations:
Hamman's sign is heard over the mediastinum due to mediastinal
emphysema or pneumomediastinum.
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Research Concepts:
Pneumomediastinum:
Lung Exam:
Choices:
1. Ampicillin
2. Levofloxacin
3. Trimethoprim sulfamethoxazole
4. Erythromycin
Answer: 2 - Levofloxacin
Explanations:
Quinolones can damage cartilage in children and are not recommended for
use in children less than 17
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Research Concepts:
Quinolones:
Choices:
1. Phenylephrine
2. Ephedrine
3. Glucagon
4. Isoproterenol
Answer: 3 - Glucagon
Explanations:
Glucagon is first line in beta-blocker overdose along with IV fluids
Glucagon increases cAMP and this improves cardiac contractility, AV
conduction, and heart rate
IV calcium salts and vasopressors are alternate options
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Research Concepts:
Toxic, Beta-Blocker:
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Research Concepts:
Great Vessel Embryology:
Choices:
1. Dyspnea
2. Cyanosis
3. Flushed skin
4. Delayed radial-femoral pulse
Answer: 2 - Cyanosis
Explanations:
Tetralogy of Fallot is the most common cyanotic congenital heart disorder.
The majority of infants present with cyanosis in the first few months after
birth.
TOF consists of four anatomical defects including overriding aorta, VSD,
septal deviation anteriorl,y and right outflow tract obstruction. Today the
condition is readily diagnosed with ECHO at birth or during pregnancy.
The diagnosis is made by ECHO and surgery is performed on an elective
basis. Most surgeons prefer to do the surgery within the first year of life.
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Research Concepts:
Tetralogy Of Fallot:
Choices:
1. Prazosin
2. Methyldopa
3. Lisinopril
4. Nitroglycerin
Answer: 4 - Nitroglycerin
Explanations:
Nitroglycerin works by relaxing vascular smooth muscles
This occurs due to utilization of nitric oxide
Nitric oxide can be easily depleted from vascular smooth muscles, if
nitroglycerin is used continuously
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Research Concepts:
Nitroglycerin:
Choices:
1. Metoprolol
2. Clonidine
3. Captopril
4. Thiazide
Answer: 4 - Thiazide
Explanations:
Thiazide diuretics can decrease blood pressure and are often used in
combination therapy with beta-blockers or ACE inhibitors.
Thiazide diuretics are particularly useful in African American and elderly
patients.
Thiazide drugs can induce hypokalemia, hyperuricemia, and
hyperglycemia. Serum potassium levels should be closely monitored in
patients who are predisposed to cardiac arrhythmias (individuals with left
ventricular hypertrophy, coronary artery disease, and CHF) and who are
concurrently being treated with thiazide diuretics and digitalis.
Thiazide diuretics should be used with caution in the treatment of
hypertensive diabetics or patients with hyperglycemia.
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Research Concepts:
Diuretics:
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Research Concepts:
Hypercalcemia:
Choices:
1. Alpha blockers
2. Calcium channel blockers
3. Diuretics
4. ACE inhibitors
Answer: 4 - ACE inhibitors
Explanations:
ACE Inhibitors have been shown to reduce mortality and morbidity in
congestive heart failure.
ACE inhibitors reduce aldosterone secretion, salt and water retention, and
afterload.
ACE inhibitors are now considered first line drugs for congestive heart
failure.
ACE inhibitors lower arterial resistance and increase venous capacitance,
increase cardiac output, and lower renovascular resistance.
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Research Concepts:
Heart Failure, Congestive:
Choices:
1. Positive end expiratory pressure
2. Synchronized intermittent mandatory ventilation
3. Assist-control ventilation
4. Pressure-control ventilation
Answer: 1 - Positive end expiratory pressure
Explanations:
Alveolar recruitment causes decreased intrapulmonary shunting, increased
lung compliance and improved gas exchange
This can be accomplished by positive end expiratory pressure (PEEP)
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Research Concepts:
Positive End-Expiratory Pressure (PEEP):
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Research Concepts:
Labetalol:
Choices:
1. Castor oil
2. Bethanechol
3. Ferrous sulfate
4. Amikacin
Answer: 3 - Ferrous sulfate
Explanations:
Oral ferrous sulfate can cause constipation
Castor oil is an irritant laxative
Bethanechol also increases bowel motion
Amikacin cannot be absorbed from the gastrointestinal system
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Research Concepts:
Iron Supplementation:
Constipation:
Choices:
1. Prerenal
2. Intra-renal
3. Post renal
4. ESRD
Answer: 1 - Prerenal
Explanations:
Prerenal failure is associated with decrease blood supply to the kidneys
Intra renal failure is associated with nephrotoxicity
Post renal failure is common in obstructive disorder
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Research Concepts:
Acute Renal Failure:
Choices:
1. Age
2. Albumin levels less than 2.5 g/l
3. Renal failure
4. Weight greater than 120 kg
Answer: 2 - Albumin levels less than 2.5 g/l
Explanations:
Albumin has a half-life of 20 days and is often used as an inflammatory
marker.
Levels of albumin < 2.5 g/l are associated with high morbidity.
Low levels of albumin are usually seen in liver disease, nephritic syndrome,
burns, and starvation.
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Research Concepts:
Preoperative Evaluation And Management:
Choices:
1. ABO antibody
2. ABO antigen
3. Leukocyte antigens
4. Blood contaminants
Answer: 3 - Leukocyte antigens
Explanations:
Febrile non-hemolytic reaction is caused by preformed leukocyte antigen
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Research Concepts:
Blood Transfusion:
Choices:
1. Abdominal pain
2. Arrhythmia
3. Myalgia
4. Seizures
Answer: 2 - Arrhythmia
Explanations:
Digoxin toxicity has been associated with visual changes, bradycardia,
nausea, and arrhythmia.
Cardiac glycoside toxicity can be problematic due to its narrow therapeutic
window.
Digoxin is among the 50 most prescribed drugs in the United States.
Despite visual changes, pupils are spared.
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Research Concepts:
Digoxin Toxicity:
Choices:
1. Hyperkalemic cardiac arrest
2. Hypothermic arrest
3. Fibrillating heart
4. Empty beating heart
Answer: 1 - Hyperkalemic cardiac arrest
Explanations:
The hyperkalemic arrested heart has the least oxygen requirement. The
highest requirements for oxygen are in the empty beating heart, followed by
the fibrillating heart.
Even though hypothermia decreases oxygen requirements, it is still not as
efficient as the potassium arrested heart in decreasing oxygen requirements.
Doing open heart surgery, inadequate oxygen to the heart results in
subendocardial damage with subsequent depression in function. The left
ventricular subendocardium is the most susceptible region of the left
ventricle because it can receive its blood supply only during diastole.
Conversely, the outer shell of the left ventricle and normal right ventricle
have lower compressive forces and can be perfused throughout the cardiac
cycle.
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Research Concepts:
Cardiopulmonary Bypass:
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Research Concepts:
Mitral Valve Surgery, Complications:
Embolic Stroke:
Choices:
1. Hypercalcemia
2. Hypocalcemia
3. Hyperkalemia
4. Hypokalemia
Answer: 4 - Hypokalemia
Explanations:
Hypokalemia enhances digoxin toxicity.
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Research Concepts:
Hypokalemia:
Choices:
1. Within 1 hour
2. Within 3 hours
3. Within 5 hours
4. Within 6 hours
Answer: 4 - Within 6 hours
Explanations:
It is recommended that t-PA be administered within 6 hours of an acute MI.
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Research Concepts:
Myocardial Infarction, Acute:
Choices:
1. Pulsus parvus
2. Malar flush
3. Pulsus tardus
4. Increased murmur with squatting
Answer: 2 - Malar flush
Explanations:
Other findings to in aortic stenosis include a decreased carotid pulse.
Malar flush occurs with mitral stenosis.
Syncope, angina, and dyspnea on exertion are also prevalent symptoms.
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Research Concepts:
Aortic Stenosis:
Choices:
1. It is a hypnotic agent
2. It is commonly used for induction of anesthesia
3. Recovery from propofol is fast
4. It has analgesic properties
Answer: 4 - It has analgesic properties
Explanations:
Propofol is a common hypnotic agent used for induction of general
anesthesia
Opioids such as fentanyl may be combined with propofol to alleviate pain
Propofol is not considered an analgesic
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Research Concepts:
Propofol:
Choices:
1. Myoglobin
2. Creatine kinase
3. Troponin I
4. Creatine kinase, MB
Answer: 3 - Troponin I
Explanations:
Troponin I will remain positive for up to a week after myocardial damage
CK(MB) remains positive for 2 to 3 days
Myoglobin is only elevated for 1 to 2 days and is very nonspecific
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Research Concepts:
Chest Pain:
Choices:
1. Right ventricular end diastolic volume
2. Alveolar pressure
3. Right atrium volume
4. Left ventricular pressure
Answer: 4 - Left ventricular pressure
Explanations:
Left ventricular pressure decrease with inspiration
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Research Concepts:
Cardiac Physiology:
Choices:
1. 25%
2. 45%
3. 65%
4. 85%
Answer: 3 - 65%
Explanations:
Sixty-five percent of people who stop smoking will relapse within 3 months
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Research Concepts:
Smoking Cessation:
Choices:
1. Naloxone
2. Naltrexone
3. Flumazenil
4. Fentanyl
Answer: 3 - Flumazenil
Explanations:
Overdose of benzodiazepines is treated with flumazenil.
Naloxone is an antidote for opiate overdose.
It is important to continue with resuscitation until there is full recovery.
Fentanyl can worsen respiratory depression if administered with
benzodiazepines.
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Research Concepts:
Flumazenil:
Toxic, Benzodiazepine:
Choices:
1. Lepirudin
2. Argatroban
3. Low molecular weight heparin (LMWH)
4. Fondaparinux
Answer: 3 - Low molecular weight heparin (LMWH)
Explanations:
LMWH has heparin, can contribute to immune mediated HIT by forming
immune complexes
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Research Concepts:
Thrombocytopenia, Heparin Induced:
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Research Concepts:
Tetralogy Of Fallot:
Choices:
1. Longitudinal right ventriculotomy
2. Transventricular repair via infarct
3. Repair ventricular septal repair via right atrium
4. Longitudinal left ventriculotomy
Answer: 2 - Transventricular repair via infarct
Explanations:
The VSR is always approached via a transventricular approach through the
infarct zone
The defect in the septum is usually found immediately beneath this
The infarct zone is excised and a patch is used to close the defect
When the VSR is located in the apex, it consists of amputation of the apex
of the ventricle, including the involved portion of the ventricular septum
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Research Concepts:
Post Infarct Ventricular Septal Rupture:
Choices:
1. Septal rupture
2. Ventricular arrhythmia
3. Cardiogenic shock
4. Atrial fibrillation
Answer: 2 - Ventricular arrhythmia
Explanations:
Ventricular arrhythmias occur in up to 75% of patients within the first 72
hours after myocardial infarction, mostly in the first day
Septal rupture is possible but much less common
Atrial fibrillation is also a possibility but is not the major concern
An extension of the infarction or a second MI could cause cardiogenic
shock but this is only seen in 10% of patients
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Research Concepts:
Acute Myocardial Infarction:
Choices:
1. Pulmonary edema
2. Stroke
3. Arrhythmias
4. Hemolysis
Answer: 3 - Arrhythmias
Explanations:
Hyperkalemia is defined as a serum potassium > 5.5 mEq/L and may cause
cardiac dysrhythmias and sudden death.
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Research Concepts:
Hyperkalemia:
Choices:
1. Tazobactam
2. Sulbactam
3. Clavulanic acid
4. Ticarcillin
Answer: 4 - Ticarcillin
Explanations:
A beta-lactamase inhibitors are given with a beta-lactam antibiotics.
The three in common use are clavulanic acid, tazobactam, and sulbactam.
The inhibitors do not usually have significant antibiotic activity. They
inhibit beta-lactamase activity prevent inactivation of beta lactam
antibiotics.
Ticarcillin is a beta-lactam antibiotics.
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Research Concepts:
Beta Lactamase Inhibitors:
Choices:
1. Mitral stenosis
2. Mitral regurgitation
3. Endotracheal intubation
4. Tricuspid stenosis
Answer: 4 - Tricuspid stenosis
Explanations:
Pulmonary pressure measures left sided diseases.
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Research Concepts:
Mitral Stenosis:
Swan-Ganz Catheterization:
Tricuspid Stenosis:
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Research Concepts:
Cardiac Tamponade:
Choices:
1. Fatigue
2. Orthopnea
3. Dyspnea
4. Ataxia
Answer: 4 - Ataxia
Explanations:
The common symptoms of aortic regurgitation are caused by left-sided
failure.
Many patients may initially have no symptoms.
Deterioration may occur before symptoms develop, so serial
echocardiograms on these patients may be indicated.
The prevention of permanent cardiac damage may include surgery before
left ventricular dysfunction deteriorates.
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Research Concepts:
Aortic Regurgitation:
Choices:
1. Gram positive cocci
2. Gram negative cocci
3. Gram positive rods
4. Gram negative rods
Answer: 4 - Gram negative rods
Explanations:
Gram negative rods are the most common cause of nosocomial pneumonia
in patient on mechanical ventilation
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Research Concepts:
Nosocomial Pneumonia:
Mechanical Ventilation:
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Research Concepts:
Beta-Blockers:
Angina, Stable:
Angina, Unstable:
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Question 774: The first heart sound usually correlates with what wave on
the jugular pressure curve?
Choices:
1. V wave
2. C wave
3. Y descent
4. X descent
Answer: 2 - C wave
Explanations:
The first heart sound correlates with the C wave.
The C wave usually signifies closure of the tricuspid valve.
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Research Concepts:
Heart Sounds:
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Research Concepts:
Acid-base Balance:
Choices:
1. Ulnar nerve
2. Trigeminal nerve
3. Facial nerve
4. Phrenic nerve
Answer: 4 - Phrenic nerve
Explanations:
Bilateral phrenic nerve transection would cause paralysis of the diaphragm
and lead to death
Unilateral phrenic nerve transection is usually tolerated
Prognosis is dependent on underlying pulmonary status
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Research Concepts:
Phrenic Nerve Transection:
Choices:
1. Aminocaproic acid
2. Fresh frozen plasma
3. Vitamin K
4. Platelet transfusion
Answer: 1 - Aminocaproic acid
Explanations:
Anti-plasmin agents are useful in open-heart surgery where excessive
plasmin is generated.
Drugs such as aminocaproic acid or tranexamic acid are useful and inhibit
the fibrinolysis by inhibiting plasminogen activation.
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Research Concepts:
Fibrinolysis:
Anti-Plasmin Agents:
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Research Concepts:
Adrenal Crisis:
Choices:
1. They are always positive
2. They should be obtained 3-4 times in the first 24 hrs
3. They should be obtained after antibiotic therapy
4. They are usually negative
Answer: 2 - They should be obtained 3-4 times in the first 24 hrs
Explanations:
Dukes' criteria for establishing infectious endocarditis include two major
criteria and three minor criteria. Positive blood cultures from 2 separate
occasions should be drawn at least 12 hours apart.
An echocardiogram should reveal an oscillating mass on the valve in the
path of a regurgitant jet. In the absence of an alternate anatomic
explanation, the echo should reveal implanted material.
Minor Dukes' criteria include fever, evidence of embolism, pulmonary
infarcts, Janeway lesions, and conjunctival hemorrhage.
Other features of endocarditis include glomerulonephritis, Osler nodes, and
a positive echocardiogram.
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Research Concepts:
Endocarditis, Infectious:
Choices:
1. 100 U/hr
2. 55 U/kg
3. 75 U/kg
4. 13 U/kg
Answer: 3 - 75 U/kg
Explanations:
The correct heparin loading dose is 75 U/kg follow by maintenance of 13
U/kg/hr
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Research Concepts:
Heparin:
Choices:
1. Bosentan
2. Prostaglandin E
3. Alprostadil
4. Latanoprost
Answer: 4 - Latanoprost
Explanations:
Latanoprost is a prostaglandin analog used for glaucoma
Nifedipine, diltiazem, iloprost, and treprostinil are also used
Prostaglandin E suppositories are used to induce abortion
Bosentan is used in pulmonary hypertension
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Research Concepts:
Bosentan:
Choices:
1. Infection
2. Atelectasis
3. DVT
4. UTI
Answer: 2 - Atelectasis
Explanations:
Fever in post operative day one is most likely to be pulmonary related
Poor lung expansion mainly due to pain and bed rest
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Research Concepts:
Postoperative Management:
Atelectasis:
Choices:
1. Pain
2. Vomiting
3. Nausea
4. Bowel sounds
Answer: 4 - Bowel sounds
Explanations:
Hyperactive bowel sounds are consistent with obstruction, whereas with
ileus bowel sounds are generally absent.
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Research Concepts:
Ileus:
Choices:
1. Antihistamines
2. Topical steroids
3. Epinephrine
4. Topical antipruritics
Answer: 3 - Epinephrine
Explanations:
The primary therapy is to discontinue the offending agent
The remaining therapies all can be helpful depending on the extent and
severity of the reaction
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Research Concepts:
Anaphylaxis:
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Research Concepts:
Aldosterone:
Choices:
1. Congestive heart failure
2. Cyanosis
3. Decreased peripheral perfusion
4. Absent lower extremity pulses
Answer: 2 - Cyanosis
Explanations:
Cyanosis is the most common presentation of tricuspid atresia.
The degree of cyanosis depends on the amount of blood flow to the
pulmonary circulation.
Digital clubbing is also a common feature of the disorder.
Other findings include JVP pulsations, decreased peripheral pulses, and
hyperdynamic apical impulse.
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Research Concepts:
Tricuspid Atresia:
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Research Concepts:
Aortic Dissection:
Choices:
1. Furosemide
2. Balloon dilatation
3. Emergent surgery
4. Stress test
Answer: 3 - Emergent surgery
Explanations:
In all symptomatic patients with AS, surgery is indicated.
If the symptoms persist, there is a 50% chance of death within 2-3 years.
Aortic stenosis is best treated with a valve replacement.
Valve repair techniques do not work for the aortic valve.
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Research Concepts:
Aortic Stenosis:
Choices:
1. Cefoperazone
2. Cefotetan
3. Cefazolin
4. Cefoxitin
Answer: 4 - Cefoxitin
Explanations:
Cefoperazone, cefazolin, and cefotetan may cause hypoprothrombinemia
and disulfiram like reactions.
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Research Concepts:
Cephalosporins:
Hypoprothrombinemia:
Choices:
1. Severe vasoconstriction
2. Methemoglobinemia
3. Pulmonary edema
4. Bleeding
Answer: 2 - Methemoglobinemia
Explanations:
Excess nitroglycerin can cause methemoglobinemia, which can be fatal if
left undiagnosed.
Treatment involves administration of methylene blue or N acetyl cysteine.
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Research Concepts:
Methemoglobinemia:
Choices:
1. Morbid obesity
2. Valvular cardiac disease
3. Hypertension
4. Bronchospasm
Answer: 4 - Bronchospasm
Explanations:
The administration of adenosine or dipyridamole may precipitate acute
bronchospasm and is contraindicated with asthma or other bronchospastic
diseases.
They cause dilation and increased blood flow in normal coronary arteries,
but not in diseased, stenotic coronary arteries.
They are used for pharmacologic stress testing in patients who cannot
tolerate physical stress, such as individuals with severe emphysema or
morbid obesity.
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Research Concepts:
Pharmacologic Stress Testing:
Bronchospasm:
Choices:
1. Face mask
2. Gloves
3. Eye protection
4. All of the above
Answer: 4 - All of the above
Explanations:
A facemask should be worn for protection when performing tracheal
suctioning
Gloves should also be worn for protection
Eye protection should also be worn
Sterile technique should be observed when performing tracheal suctioning
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Research Concepts:
Mechanical Ventilation:
Nasotracheal Suctioning:
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Research Concepts:
Nitroglycerin:
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Research Concepts:
Pericardial Effusion:
Choices:
1. Right coronary artery
2. Left coronary artery
3. Circumflex
4. Left main
Answer: 1 - Right coronary artery
Explanations:
The majority of coronary artery fistulas arise from the RCA.
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Research Concepts:
Coronary Artery Fistula:
Choices:
1. Nuclear medicine stress test
2. Right heart catheterization
3. Left hear catheterization with coronary angiogram
4. Holter monitor
Answer: 2 - Right heart catheterization
Explanations:
Indications for surgical repair for mitral stenosis include pulmonary
hypertension and systemic embolization
A young patient would not need stress testing or coronary artery
angiography
Holter monitoring might detect atrial fibrillation
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Research Concepts:
Mitral Stenosis:
Choices:
1. Diet
2. Dental care
3. Medications
4. Keeping appointments
Answer: 3 - Medications
Explanations:
Postoperatively, all patients with mechanical valves and some patients with
bioprostheses are maintained indefinitely on anticoagulant therapy
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Research Concepts:
Aortic Valve:
Choices:
1. Antibiotic should be administered only before a procedure
2. Penicillin is the choice for dental procedures
3. Dermatologic procedure requires clindamycin
4. Erythromycin is an option for TURP
Answer: 1 - Antibiotic should be administered only before a procedure
Explanations:
Antibiotic prophylaxis is administered before a procedure to prevent
endocarditis
Procedures on infected skin should be treated with an antistaphylococcal
antibiotic or cephalosporin
TURP does not require prophylaxis
Clindamycin can be used for patients with allergy to penicillin
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Research Concepts:
Prosthetic Heart Valve:
Choices:
1. Tacrolimus causes less neurotoxicity
2. Tacrolimus does not induce seizures
3. Tacrolimus does not cause hirsutism
4. Dose levels of tacrolimus do not require monitoring
Answer: 3 - Tacrolimus does not cause hirsutism
Explanations:
Tacrolimus is more toxic than cyclosporine in certain cases.
Tacrolimus is more nephrotoxic and neurotoxic than cyclosporine.
Tacrolimus should not be used in individuals who have a history of
seizures.
The one benefit of tacrolimus is that it does not cause gingival hyperplasia
or hirsutism.
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Research Concepts:
Liver Transplantation:
Kidney Transplantation:
Heart Transplantation:
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Question 800: How much does blood pressure drop with postprandial
hypotension?
Choices:
1. 5 mmHg
2. 10 mmHg
3. 15 mmHg
4. 20 mmHg
Answer: 4 - 20 mmHg
Explanations:
Blood pressure can drop 20 mm Hg
Avoid large meal
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Research Concepts:
Postprandial Hypotension:
Choices:
1. Hyperkalemia
2. Transfusion-related acute lung injury
3. Hemolytic reactions
4. Metabolic acidosis
Answer: 1 - Hyperkalemia
Explanations:
Transfusion-associated metabolic reactions can occur but are most common
during massive transfusion.
The most common cause of death in the US from transfusions is secondary
to transfusion-related acute lung injury and occurs in 0.04-0.16% of patients
transfused.
Fatal hemolytic reactions occur in 1 case per 250,000-600,000 .
Hyperkalemia is due to potassium leakage in stored blood. Massive blood
transfusion can result in death if the patient is acidotic.
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Research Concepts:
Transfusion-related Acute Lung Injury:
Blood Transfusion:
Choices:
1. Tinnitus
2. Dizziness
3. Numbness of the extremities
4. Palpitations
Answer: 4 - Palpitations
Explanations:
Common side effects of lidocaine include tinnitus, dizziness, tremors, and
blurred vision
The initial symptoms of toxicity may include circumoral numbness, tingling
of extremities, diaphoresis and hypotension
At high doses, seizures and coma can occur
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Research Concepts:
Lidocaine:
Side Effects:
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Research Concepts:
Wound Healing:
Epithelialization:
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Research Concepts:
Pulmonary Artery Catheterization:
Choices:
1. Clamp and sew
2. Femoral-femoral bypass
3. Partial left heart bypass
4. Cardiopulmonary bypass, hypothermia, and circulatory arrest
Answer: 1 - Clamp and sew
Explanations:
The clamp and sew technique is acceptable if the patient is unstable.
However, if used in a stable patient, and the patient develops post-operative
paraplegia, the physician may face serious litigation.
Today it is recommended that some form of bypass/shunt be used to reduce
the incidence of paraplegia.
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Research Concepts:
Chest Trauma:
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Research Concepts:
Pulmonary Physiology:
Choices:
1. Admit to rule out pulmonary embolism
2. Chest x-ray to rule out pneumothorax
3. Nitroglycerin drip to treat angina
4. Start non-steroidal anti-inflammatory drugs (NSAIDs)
Answer: 4 - Start non-steroidal anti-inflammatory drugs (NSAIDs)
Explanations:
The above patient has a classic presentation of Dressler syndrome. Dressler
is a post-myocardial infarction pericarditis, which presents about 2-4 weeks
after the acute myocardial infarction.
Patients will generally present with a low-grade fever, neck and pleuritic
chest pain, general malaise, and fatigue. Blood work is normal and an ECG
will show non-specific ST elevations.
A few patients will develop a pericardial effusion. All studies to investigate
this disorder will yield normal results and the diagnosis is one of exclusion.
The treatment involves non-steroidal anti-inflammatory drugs (NSAIDs).
When NSAIDs fail, one may elect to give a short course of steroids.
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Research Concepts:
Dressler Syndrome:
Choices:
1. Beta blockers
2. Adenosine
3. Calcium channel blocker
4. Synchronized cardioversion
Answer: 2 - Adenosine
Explanations:
Supraventricular tachycardia can be treated with maneuvers that increase
vagal tone such as valsalva, carotid massage, or immersing the face in cold
water
Adenosine is the drug of choice as it slows AV node conduction and dilates
coronary arteries
Diltiazem and verapamil can both be effective
Unstable patients should be treated with synchronized cardioversion
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Research Concepts:
Paroxysmal Supraventricular Tachycardia:
Adenosine:
Choices:
1. Aortic stenosis
2. Patent ductus arteriosus
3. Atrial septal defect
4. Congestive heart failure
Answer: 4 - Congestive heart failure
Explanations:
Pulsus alternans is a waveform with alternating strong and weak beats.
Pulsus alternans is always an indication of a failing heart.
Patients with congestive heart failure and weak left ventricle usually
develop pulsus alternans.
Pulsus alternans is associated with a poor prognosis.
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Research Concepts:
Heart Failure, Congestive:
Choices:
1. Early ambulation after surgery
2. Use of LMWH
3. Use of aspirin
4. Compression stockings
Answer: 3 - Use of aspirin
Explanations:
Deep vein thrombosis is the formation of a thrombus in a deep vein.
Anticoagulation with heparin/LMWH, compression stockings, and early
ambulation after surgery are the effective methods for prevention of a DVT.
Aspirin is not effective
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Research Concepts:
Deep Venous Thrombosis Prophylaxis:
Choices:
1. Decreased fibrinogen and elevated FDP
2. Diffuse bleeding
3. Consumption of coagulation factors
4. Multiple clots in large vessels
Answer: 4 - Multiple clots in large vessels
Explanations:
Large vessel thrombosis is not a characteristic of disseminated intravascular
coagulation (DIC)
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Research Concepts:
Disseminated Intravascular Coagulation:
Choices:
1. Within 48 hours after surgery
2. Five to six days after the surgery
3. After a high fever
4. When the surgery site is shaved in the operating room
Answer: 2 - Five to six days after the surgery
Explanations:
Most surgical site infections become obvious five or more days after the
operation. More than 50 percent are seen just prior to discharge from the
hospital.
Fevers after surgery are usually not due to an infection, but rather to
atelectasis.
Surgical site infections that occur within 48 hours after surgery may be
caused by Group B Streptococci or Clostridia. However, these infections
are very rare.
Infections can present late after surgery, but this is rare and often due to
poor skincare at home.
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Research Concepts:
Wound Infection:
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Research Concepts:
Diabetes Mellitus, Type 2:
Surgical Complications:
Choices:
1. Cardiorespiratory monitoring
2. Administration of oral potassium
3. Administration of insulin and glucose
4. IV fluids with potassium
Answer: 3 - Administration of insulin and glucose
Explanations:
Hypokalemia can be worsened with administration of insulin and glucose
Administration of insulin and glucose pushes potassium into cells
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Research Concepts:
Hypokalemia:
Choices:
1. Epinephrine
2. Transvenous pacemaker
3. Fluid challenge
4. Needle thoracostomy
Answer: 2 - Transvenous pacemaker
Explanations:
Possible causes of pulseless electrical activity (PEA) include hypoxia,
hypovolemia, cardiac tamponade, acidosis, tension pneumothorax, and
pulmonary embolus.
Pacing and calcium are not effective treatments.
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Research Concepts:
Pulseless Electrical Activity:
Choices:
1. Nitroprusside
2. Metoprolol
3. Hydralazine
4. Nitroglycerin
Answer: 1 - Nitroprusside
Explanations:
To lower blood pressure, a short acting agent such as nitroprusside is the
choice.
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Research Concepts:
Hypertension:
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Research Concepts:
Vancomycin:
Choices:
1. C
2. A
3. B
4. X
Answer: 3 - B
Explanations:
Category A indicates well controlled studies in pregnant women have
shown no fetal abnormalities. Category C indicates that animal studies have
shown an adverse effect and there are no well controlled studies in pregnant
women
Category D indicates adequate well controlled and observational studies in
pregnant women have demonstrated fetal abnormalities. The benefits may
outweigh the risks
X category indicates adequate well controlled and observational studies
with animals and pregnant women have shown fetal defects. The drug is
contraindicated.
Acetaminophen is the drug of choice for OTC pain relievers in pregnant
patients.
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Research Concepts:
Medication, Pregnancy:
Choices:
1. A normal pressure in the right ventricle is 25/0 mmHg
2. A normal pressure in the pulmonary artery is 24/8 mmHg
3. A normal pressure in the left ventricle is 120/0 mmHg
4. A red blood cell needs one second to equilibrate the exchange between O2
and CO2 in the lungs
Answer: 4 - A red blood cell needs one second to equilibrate the exchange
between O2 and CO2 in the lungs
Explanations:
The pressures described are all in the normal range for the location
Only 0.25 seconds is required for equilibration of O2 and CO2 in the lungs
by RBCs
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Research Concepts:
Cardiac Physiology:
Pulmonary Physiology:
Choices:
1. Hypotension
2. Hypercholesterolemia
3. Coagulation
4. Platelet function
Answer: 1 - Hypotension
Explanations:
Risk factor for diabetes is hypertension
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Research Concepts:
Macrovascular Complications:
Diabetes Mellitus:
Choices:
1. Smoking
2. Hypertension
3. Family history
4. Sedentary lifestyle
Answer: 3 - Family history
Explanations:
Modifiable risk factors include high lipids, smoking, hypertension, diabetes,
and sedentary lifestyle.
Non-modifiable risk factors include age, gender, and family history.
Other risk factors include heavy alcohol intake and elevated plasma
homocysteine levels.
Of the modifiable risk factors, decreases in lipid levels have the most
profound effect on coronary artery disease.
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Research Concepts:
Coronary Artery Disease:
Choices:
1. Accumulated keratin
2. An overproduction of sebaceous glands
3. Meibomian gland occlusion
4. An abundance of lipid cells
Answer: 4 - An abundance of lipid cells
Explanations:
Xanthelasmas are formed on the eyelid and represent cholesterol deposits
They are most common in those of Asian and Mediterranean backgrounds.
They may be seen more commonly but not exclusively in those with
hyperlipidemia.
They are often hereditary.
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Research Concepts:
Xanthelasma:
Choices:
1. Persistent pulmonary stenosis
2. Atrial septal defect
3. Persistent ventricular septal defect
4. Residual pulmonary atresia
Answer: 2 - Atrial septal defect
Explanations:
An elevated RV/LV pressure level is a risk factor for premature death both
early and late after repair.
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Research Concepts:
Tetralogy Of Fallot:
Choices:
1. Clopidogrel
2. Ticlopidine
3. Heparin
4. Abciximab
Answer: 4 - Abciximab
Explanations:
Abciximab is a monoclonal antibody that reversibly inhibits the binding of
fibrin and other ligands to the platelet glycoprotein receptor.
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Research Concepts:
Antiplatelet Medications:
Choices:
1. Captopril
2. Furosemide
3. Digoxin
4. Minoxidil
Answer: 4 - Minoxidil
Explanations:
Minoxidil is an alpha antagonist and has no role in the treatment of
congestive heart failure.
Minoxidil is used in the treatment of hypertension and has an odd side
effect of excess hair growth.
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Research Concepts:
Heart Failure, Congestive:
Choices:
1. Every one hour
2. Every two hours
3. Every four hours
4. Every six hours
Answer: 2 - Every two hours
Explanations:
A bedridden patient should be turned every two hours
This is the best way to prevent bedsores
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Research Concepts:
Decubitus Ulcers:
Choices:
1. Aortic stenosis
2. Endocarditis
3. Aortic root dissection
4. Right ventricular hypertrophy
Answer: 1 - Aortic stenosis
Explanations:
Calcification of the bicuspid aortic valve begins in the second decade of
life.
Almost 50% of patients with severe aortic stenosis have a congenital
bicuspid valve.
Bicuspid aortic valve is also a common cause of aortic regurgitation.
The risk of developing endocarditis with a bicuspid aortic valve is about
20% over a lifetime.
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Research Concepts:
Aortic Stenosis:
Aortic Valve:
Choices:
1. Two-vessel disease with severe proximal LAD involvement
2. Complex three-vessel disease
3. Left main disease
4. All of the above
Answer: 4 - All of the above
Explanations:
ACC/AHA guidelines recommend considering CABG for people in all of
the above groups
Another group for consideration of CABG are high-risk patients with LV
systolic dysfunction
Low-risk patients receive negligible or modestly increased survival with
CABG
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Research Concepts:
Coronary Artery Bypass Graft:
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Research Concepts:
Nitroglycerin:
Choices:
1. Patients present with sharp chest pain
2. Pain improve with position
3. Most patients will have normal ECG
4. Hospital admission is not advised for viral etiology
Answer: 3 - Most patients will have normal ECG
Explanations:
Acute pericarditis is associated with ST elevation in the precordial leads
and PR segment depression in lead II and V4 to V6
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Research Concepts:
Pericarditis:
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Research Concepts:
Epidemiology, Morbidity And Mortality Measurement:
Cardiovascular Disease:
Choices:
1. Mechanical ventilation
2. BiPAP
3. 100% non-rebreather oxygen
4. Theophylline to stimulate the respiratory center
Answer: 1 - Mechanical ventilation
Explanations:
There are many indications for mechanical ventilation. In general, with
ineffective gas exchange and labored breathing, the individual should be
intubated.
Other criteria for ventilation include tachypnea, low vital capacity, retention
of CO2, clinical deterioration, and respiratory muscle fatigue.
Obtundation, coma, and hypotension are other indications to ventilate the
patient.
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Research Concepts:
Intubation, Indications:
Choices:
1. 1 week
2. 2 weeks
3. 1 month
4. 6 months
Answer: 2 - 2 weeks
Explanations:
Based on consensus opinion of the Aerospace Medical Association
(ASMA), the American College of Cardiology (ACC), and the American
Heart Association (AHA), patients can fly at 2 weeks after an
uncomplicated myocardial infarction or simple percutaneous intervention.
The patient should be able to tolerate his usual activities. Following a
myocardial infarction, a stress test is done in almost all low-risk patients.
This test can assist in determining the safety of flying.
Myocardial infarction, with associated severe depression of cardiac
function, should delay flying until 2 weeks after the patient is medically
stable. Patients with unstable angina should not fly. Stable angina is not a
contraindication.
Patients with advanced congestive heart failure may benefit from
supplemental oxygen.
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Research Concepts:
Myocardial Infarction, Acute:
Choices:
1. Cor pulmonale
2. Polycythemia
3. Pneumothorax
4. Hepatitis
Answer: 4 - Hepatitis
Explanations:
IPF causes scarring of the lungs with no apparent cause
Complications of IPF may include cor pulmonale, pneumothorax,
polycythemia, chronic hypoxemia, pulmonary hypertension, and respiratory
failure
Therapy for IPF may include corticosteroids, immunosuppressive agents,
supplemental oxygen, and lung rehabilitation
Hepatitis is not a complication of the disease
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Research Concepts:
Pulmonary Fibrosis, Idiopathic:
Choices:
1. Elimination rate constant
2. Clearance (Cl)
3. Volume of distribution (Vd)
4. Loading dose
Answer: 4 - Loading dose
Explanations:
Half-life is a function of both Cl and Vd
Elimination rate constant= Cl/Vd
Half-life= 0.693/Elimination rate constant
As Cl and Vd changes, so does the half-life of a drug
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Research Concepts:
Half Life:
Choices:
1. Digoxin
2. Hydralazine
3. Propranolol
4. Quinidine
Answer: 4 - Quinidine
Explanations:
Quinidine can cause hemolytic anemia
The mechanism of such a side effect is most likely oxidative stress to red
blood cells
Hydralazine is implicated in drug induced SLE
Propranolol can cause severe bradycardia
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Research Concepts:
Quinidine:
Hemolytic Anemia:
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Research Concepts:
Antiarrhythmic Medication:
Lidocaine:
Choices:
1. Aortic stenosis
2. Aortic regurgitation
3. Coarctation
4. Congestive heart failure
Answer: 2 - Aortic regurgitation
Explanations:
Watson water hammer pulse describe a pulse that is very forceful or
bounding.
The pulse is often rapidly increasing and suddenly collapsing.
Water hammer pulse is due to increased stroke volume of the left ventricle
and a decrease in systemic vascular resistance.
Water hammer pulse is often seen in patients with aortic regurgitation.
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Research Concepts:
Aortic Regurgitation:
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Research Concepts:
Ventricular Septal Defect:
Choices:
1. Hypocalcemia
2. Hypercalcemia
3. Hyperkalemia
4. Hypomagnesemia
Answer: 3 - Hyperkalemia
Explanations:
The presence of peaked T waves on an ECG should suggest hyperkalemia.
Severe hyperkalemia may also be associated with wide QRS complexes and
reduction in the size of P waves.
Hyperkalemia causes an overall membrane depolarization that inactivates
many sodium channels.
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Research Concepts:
Electrocardiogram:
Hyperkalemia:
Choices:
1. Muffled heart sounds
2. Bradycardia
3. Hypotension
4. Jugular venous distension
Answer: 2 - Bradycardia
Explanations:
Cardiac tamponade is characterized by muffled heart sounds, hypotension,
and jugular venous distention.
There is often tachycardia, not bradycardia.
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Research Concepts:
Cardiac Tamponade:
Choices:
1. Ignore temperature of bladder and come off bypass
2. Place a rectal temperature probe
3. TEE
4. Check warmer in circuit and replace oxygenator
Answer: 3 - TEE
Explanations:
When the temperature is different in 2 probes and the patient fails to warm
up, please think dissection.
TEE will be required to search for dissection.
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Research Concepts:
Dissection, Aortic:
Choices:
1. It is structurally similar to vitamin K
2. It works immediately after administration
3. It cannot be administered simultaneously with heparin
4. It affects factors II, VII, IX, and X
Answer: 4 - It affects factors II, VII, IX, and X
Explanations:
Warfarin inhibits epoxide reductase, reducing the amount of available
vitamin K.
It is is not structurally similar to vitamin K. It reduces production of factors
II, VII, IX, and X, as well as proteins C, S, and Z.
Warfarin can initially increase coagulability as it reduces levels of protein S
and C. Therefore, it is often given after heparin (or low molecular weight
heparin) is started.
The coagulation factors must be depleted before warfarin is effective.
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Research Concepts:
Anticoagulation:
Warfarin:
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Research Concepts:
Amyloid Protein:
Choices:
1. Patients with frequent episodic angina
2. Patients with syncope
3. Valvular gradient of 40 mmHg
4. Aortic valve area of < 0.5 cm2
Answer: 3 - Valvular gradient of 40 mmHg
Explanations:
Asymptomatic patients with AS may do well for many years, but the onset
of symptoms is generally followed by rapid deterioration
Surgery is indicated in symptomatic patients. Indications for surgery in
asymptomatic patients include progressive cardiac enlargement and
findings of elevated LVEDP at rest
The gradient across the valve has to be about 50 mmHg to satisfy the
criteria for surgery
An aortic valve area of 0.5 cm2 is the smallest area and almost all patients
will be symptomatic
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Research Concepts:
Aortic Stenosis:
Choices:
1. Diabetes
2. Corticosteroid therapy
3. Obesity
4. Hypertension
Answer: 4 - Hypertension
Explanations:
Risk factors for wound infections include obesity, diabetes, corticosteroid
therapy, anemia, immunosuppression, and poor hemostasis during surgery.
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Research Concepts:
Wound Infection:
Choices:
1. Hypoxia is major pathology
2. Pulmonary wedge pressure is high
3. Infection often present
4. PEEP is beneficial
Answer: 2 - Pulmonary wedge pressure is high
Explanations:
ARDS has a mortality of at least 30 to 40%.
There is inflammation of alveoli with collapse resulting in hypoxia and
mechanical ventilatory support.
ARDS can be caused by blood borne infection, major trauma, aspiration, or
be idiopathic.
The condition is of sudden onset commonly 24 to 48 hours after the insult.
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Research Concepts:
Acute Respiratory Distress Syndrome:
Choices:
1. Hypertension
2. Increased cardiac output
3. Compromised organ profusion
4. Bradypnea
Answer: 3 - Compromised organ profusion
Explanations:
A decrease in urine output can result from altered organ profusion that can
occur with the development of shock
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Research Concepts:
Oliguria:
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Research Concepts:
Electrolytes:
Choices:
1. Systemic arterial blood pressure
2. Central venous pressure
3. Intracranial pressure
4. Heart rate
Answer: 4 - Heart rate
Explanations:
The Trendelenburg position increases venous return.
This often increases the cardiac output, central venous pressure, and
systemic arterial blood pressure.
The heart rate generally does not increase.
If the heart rate does change, it tends to decrease.
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Research Concepts:
Trendelenburg Position:
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Half Life:
Lidocaine:
Choices:
1. Medicare part A
2. Medicare part C
3. Medicare part D
4. Medicare part B
Answer: 1 - Medicare part A
Explanations:
Medicare part A covers for inpatient hospital care.
It is funded by social security tax.
Medicare part A is automatically provided to all elderly patients.
Medicare part B covers for physician services and durable medical
equipment.
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Research Concepts:
Medicare Coverage:
Choices:
1. Hypertension
2. Murmur
3. Petechiae
4. Desaturation
Answer: 1 - Hypertension
Explanations:
Air embolism is associated with hypotension.
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Research Concepts:
Venous Air Embolism:
Choices:
1. Type I allergic reaction
2. Type II allergic reaction
3. Type III allergic reaction
4. Type IV reaction
Answer: 1 - Type I allergic reaction
Explanations:
Type 1 hypersensitivity reaction is divided into immediate and delayed
types
The immediate type is mediated by IgE and is responsible for anaphylactoid
reactions
The delayed type occurs days after drug exposure and not mediated by IgE
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Research Concepts:
Anaphylaxis:
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Research Concepts:
Atrioventricular Dissociation:
Choices:
1. Right descending artery
2. Posterior descending artery
3. Circumflex artery
4. Great cardiac artery
Answer: 3 - Circumflex artery
Explanations:
The circumflex artery is a branch of the left main coronary artery.
It travels in the left atrioventricular groove.
It supplies posterolateral left ventricle and anterolateral papillary muscle.
It ends at the point where it joins to form posterior interventricular artery in
the 10% of cases where the posterior interventricular artery does not arise
from the right coronary artery.
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Research Concepts:
Heart Anatomy:
Choices:
1. PCO2= 50, PO2= 80
2. PCO2 =40, PO2=60
3. PCO2=60, PO2= 50
4. PCO2= 30, PO2=70
Answer: 3 - PCO2=60, PO2= 50
Explanations:
In a patient with normal lung function, acute respiratory failure is a PO2
<60 mm Hg and PCO2 >50 mm Hg.
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Research Concepts:
Respiratory Failure:
Choices:
1. Hypoxia
2. Atelectasis
3. Pulmonary embolus (PE)
4. Hypotension
Answer: 3 - Pulmonary embolus (PE)
Explanations:
PE is not a potential complication of nasotracheal suctioning
Potential complications include hypoxia, atelectasis, hypotension, cardiac
arrhythmias, infection, and pulmonary hemorrhage
Correct position for the procedure is sitting up at 45-degree angle with the
head turned away from the nostril entered
The position straightens the trachea and airway easing entry into bronchus
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Research Concepts:
Nasotracheal Suctioning:
Choices:
1. Metoprolol
2. Amlodipine
3. Nitroprusside
4. Terazosin
Answer: 1 - Metoprolol
Explanations:
Beta blockers can cause dyslipidemia
Amlodipine is a calcium channel blocker
Nitroprusside can cause cyanide toxicity
Terazosin can cause orthostatic hypotension
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Research Concepts:
Beta-Blockers:
Dyslipidemia:
Choices:
1. HIV
2. Mycobacterium avium
3. Treponema pallidum
4. Borrelia burgdorferi (Lyme disease)
Answer: 4 - Borrelia burgdorferi (Lyme disease)
Explanations:
Erythema migrans is the characteristic rash associated with Lyme disease.
The initial infections is secondary to a deer tick (Ixodes) bite. Borrelia
spreads hematogenously and can result in fever, headache, migratory
arthralgias, and adenopathy.
Late manifestations of the disease can involve the heart, joints, or nervous
system.
The most common neurologic manifestation is facial nerve paralysis that
does not respond to corticosteroids. This is bilateral in up to 25% of
patients.
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Research Concepts:
Lyme Disease:
Choices:
1. Increased protection against death, stroke, and myocardial infarction
2. Same degree of protection against death, stroke, and MI
3. Decreased protection against death, stroke, and MI
4. Stenting is more expensive than CABG
Answer: 2 - Same degree of protection against death, stroke, and MI
Explanations:
The Arterial Revascularization Study (ARTS) concluded stenting offered
the same degree of protection against death, stroke and MI as a CABG
Stenting for multivessel CAD is less expensive than CABG
Stenting was associated with an increased need for repeat revascularization
The Arterial Revascularization Study Semin Intern Cardiol. 1999
Dec;4(4):209-19.
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Research Concepts:
Intracoronary Stents:
Multivessel Disease:
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Question 862: Transfusion of red blood cells in a trauma patient results in
immediate hypotension, hematuria, and fever. Which of the following is not part
of the management of this patient?
Choices:
1. Intravenous fluids
2. Stopping the blood transfusion
3. Sodium bicarbonate
4. Dobutamine
Answer: 4 - Dobutamine
Explanations:
The first step in any transfusion reaction is to stop the blood transfusion.
One should anticipate hypotension, renal failure, and disseminated
intravascular coagulation.
Aggressive hydration, with crystalloid and osmotic diuresis with mannitol,
should follow.
If disseminated intravascular coagulation is documented, one may require
fresh frozen plasma, pooled cryoprecipitate, and platelets.
If there is any evidence of an allergic or anaphylactic reaction, epinephrine
and diphenhydramine should be administered. The role of corticosteroids is
controversial.
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Research Concepts:
Transfusion Reactions:
Choices:
1. Hyperkalemia
2. Hyperventilation
3. Hypoxia
4. Anxiety
Answer: 3 - Hypoxia
Explanations:
Hypoxia increases the threshold of pacemakers for intervention.
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Research Concepts:
Pacemaker:
Choices:
1. Ciprofloxacin
2. Imipenem
3. Aztreonam
4. Clindamycin
Answer: 4 - Clindamycin
Explanations:
Gram-negative infections are often treated with combination of drugs
Aminoglycosides, are often first choice, in patients with normal renal
function
Ciprofloxacin, imipenem and aztreonam are other choices to treat Gram-
negative infections
Clindamycin has good coverage of Gram positives and anaerobes, but not
Gram-negative organisms
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Research Concepts:
Gram-Negative Bacteria:
Antibiotics:
Choices:
1. Atrial rate is over 100 bpm
2. P-waves are all inverted
3. P-waves are separated by iso-electric intervals
4. MAT is seen in patients with significant lung disease
Answer: 2 - P-waves are all inverted
Explanations:
About 60 percent of patients with MAT have significant lung disease.
P-waves in MAT must have at least 3 morphologies including one normal
form.
This is best observed in leads II, III, and, V1.
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Research Concepts:
Multifocal Atrial Tachycardia:
Choices:
1. The incidence in general population 15 percent
2. Commonly associated with sudden death in infants
3. Most presentations are asymptomatic
4. S4 sound is a classic on auscultation
Answer: 3 - Most presentations are asymptomatic
Explanations:
Sudden death is rare in population with MVP
Mid systolic click is classic heart sound
The incidence of MVP in the general population is under 10 percent
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Research Concepts:
Mitral Valve Prolapse:
Choices:
1. Rheumatic fever
2. Aortic Dissection
3. Mitral valve prolapse
4. Carcinoid syndrome
Answer: 3 - Mitral valve prolapse
Explanations:
MVP is the most common cause of non-ischemic mitral regurgitation.
Patients with MVP may present with palpitations, atrial fibrillation, or
syncope.
Both anxiety and panic attacks tend to be more frequent in patients with
MVP.
MVP is more frequent in patients with Marfan syndrome polycystic kidney
disease and in Ehlers danlos syndrome.
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Research Concepts:
Mitral Valve Prolapse:
Choices:
1. Decreases
2. Increases
3. Remains the same
4. Increases then decreases
Answer: 2 - Increases
Explanations:
All gases dissolve in plasma as the temperature falls.
During hypothermia, the oxygen-Hb curve is shifted to the left and thus
oxygen bound to the Hg is not released.
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Research Concepts:
Oxyhemoglobin Dissociation Curve:
Choices:
1. IV fluids
2. Renal ultrasound
3. Furosemide
4. Bladder pressure
Answer: 1 - IV fluids
Explanations:
Fluid challenge is the initial treatment for patients with oliguria.
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Research Concepts:
Oliguria:
Choices:
1. Systole
2. Mid systolic
3. Diastole
4. End diastolic
Answer: 3 - Diastole
Explanations:
Coronary perfusion occurs at diastole
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Research Concepts:
Coronary Perfusion Pressure:
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Research Concepts:
Posttransplantation Lymphoproliferative Disorders:
Choices:
1. This patient is likely to have mitral valve stenosis
2. Administration of diuretic is beneficial
3. Angina and dizziness are likely associated symptoms
4. Beta blockers are appropriate treatment option
Answer: 2 - Administration of diuretic is beneficial
Explanations:
Rate control is critical in patients with left ventricular hypertrophy
Because ventricular filling pressure must be maintained, depletion of
vascular volume is generally not recommended
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Research Concepts:
Left Ventricular Hypertrophy:
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Research Concepts:
Collagen Synthesis:
Thiamine:
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Research Concepts:
Heparin Reversal:
Choices:
1. Bleeding
2. Thrombosis
3. Acute renal failure
4. Hemolysis
Answer: 2 - Thrombosis
Explanations:
Heparin induced thrombocytopenia is an immune mediated destruction of
platelets that is commonly seen after a few days of heparin therapy
The most common presentation is paradoxical thrombosis
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Research Concepts:
Thrombocytopenia, Heparin Induced:
Choices:
1. Daunorubicin
2. Cisplatin
3. Cyclophosphamide
4. Vinblastine
Answer: 1 - Daunorubicin
Explanations:
For daunorubicin, myocardial toxicity, is potentially fatal congestive heart
failure
This may occur when a total cumulative dosage exceeds 400 to 550 mg/m
in adults
The risk of developing congestive heart failure increases with increasing
total cumulative doses of doxorubicin in excess of 450 mg/m
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Research Concepts:
Daunorubicin:
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Research Concepts:
Lidocaine:
Choices:
1. Atracurium
2. Benztropine
3. Succinylcholine
4. Dantrolene
Answer: 3 - Succinylcholine
Explanations:
Succinylcholine is a depolarizing agent used for rapid sequence intubation
The disorder is estimated to occur in 0.0004 to 0.00625 percent of patients
who receive this medication
Succinylcholine is contraindicated in patients with a personal or family
history of malignant hyperthermia
Sevoflurane, desflurane and isoflurane can also cause similar problem
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Research Concepts:
Malignant Hyperthermia:
Succinylcholine:
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Research Concepts:
Sutures:
Choices:
1. Ticlopidine
2. Dipyridamole
3. Enteric coated Aspirin
4. Warfarin
Answer: 1 - Ticlopidine
Explanations:
Ticlopidine is a platelet inhibitor, which is different from aspirin.
Ticlopidine inhibits ADP-induced platelet aggregation and has been shown
to decrease the incidence of thrombotic strokes.
Ticlopidine can cause prolonged bleeding and its most serious side effect is
neutropenia.
Ticlopidine is generally reserved for patients who cannot tolerate aspirin.
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Research Concepts:
Antiplatelet Medications:
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Research Concepts:
Norepinephrine:
Choices:
1. A third degree block generally requires pacing
2. The risk of atrioventricular block depends on location of the infarction
3. First degree block is an indication for defibrillation
4. Mobitz II second degree is an indication for pacing
Answer: 3 - First degree block is an indication for defibrillation
Explanations:
Patients with first-degree or Mobitz I second degree atrioventricular block
usually requires no cardioversion
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Research Concepts:
Heart Block, First Degree:
Choices:
1. Increased JVP
2. Increased pulmonary artery pressure
3. Increased right ventricular pressure
4. Increased left atrial pressure
Answer: 4 - Increased left atrial pressure
Explanations:
PE causes a variety of hemodynamic alterations that result in elevated
pulmonary vascular resistance. The increased pulmonary vascular
resistance leads to right ventricular overload
Over time the right ventricular overload, lead to right ventricular failure
Other signs of PE may include a loud P2, S3 gallop, elevated JVP, tricuspid
regurgitation and pleural friction rub
The most common physical signs include tachypnea, rales, tachycardia, 4th
heart sound and loud P2
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Research Concepts:
Swan-Ganz Catheterization:
Pulmonary Embolism:
Choices:
1. Amiodarone
2. Lidocaine
3. Procainamide
4. Cocaine
Answer: 2 - Lidocaine
Explanations:
Lidocaine is a class I antiarrhythmic that can be used as a local anesthetic
Amiodarone is a class III antiarrhythmic and it is never used as a local
anesthetic
Cocaine can serve as a local anesthetic
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Research Concepts:
Lidocaine:
Local Anesthetics:
Antiarrhythmic Medication:
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Question 885: Palliative surgery in a patient with tetralogy of Fallot
requires which of the following?
Choices:
1. Placement of a shunt
2. Enlargement of the ASD
3. Closure of the VSD
4. Dilation of the pulmonary valve
Answer: 1 - Placement of a shunt
Explanations:
The definitive procedure is best done at age 12 months.
The palliative procedure involves the placement of a shunt to increase
pulmonary blood flow.
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Research Concepts:
Tetralogy Of Fallot:
Choices:
1. Digoxin
2. Captopril
3. Quinidine
4. Dobutamine
Answer: 4 - Dobutamine
Explanations:
Dobutamine is an inotropic agent with beta 1 receptor agonist activity.
Besides increasing the force of contraction of the heart, it can also be a
vasodilator to the pulmonary arteries.
Dobutamine does not stimulate dopamine receptors or stimulate the release
of norepinephrine.
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Research Concepts:
Heart Failure, Congestive:
Choices:
1. 1 week
2. 1 month
3. 3 months
4. 6 months
Answer: 3 - 3 months
Explanations:
Elective surgery should be postponed at least one month.
However, ideally it should be delayed three months.
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Research Concepts:
Elective Surgery:
Thromboembolic Event:
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Research Concepts:
Platelets:
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Research Concepts:
Calcium Channel blockers:
Choices:
1. Lidocaine has minimal inotropic effects
2. CNS toxicity is usually the first manifested sign
3. Lidocaine has arrhythmic effect
4. Lidocaine is metabolized by the liver
Answer: 3 - Lidocaine has arrhythmic effect
Explanations:
Lidocaine has minimal inotropic and no arrhythmic effects
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Research Concepts:
Lidocaine:
Choices:
1. Heart rate
2. Hematocrit
3. Resistance in epicardial coronary arteries
4. Lung disease
Answer: 3 - Resistance in epicardial coronary arteries
Explanations:
Coronary blood flow can be limited in 3 regions: arteriolar and
intramyocardial capillaries, prearteriolar vessels, and epicardial vessels
The cardiac catheterization indicated that there is not significant flow
resistance in the epicardial arteries, thus the resistance is secondary to the
arteriolar and intramyocardial capillaries and the prearteriolar vessels
Heart rate, lung function, and hematocrit are factors that affect myocardial
demand and supply
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Research Concepts:
Angina, Stable:
Choices:
1. Decrease FIO2, then PEEP, then rate, then ABG
2. Decrease PEEP, then FIO2, then rate, then ABG
3. Decrease FIO2, then PEEP, then ABG, then rate
4. Decrease rate, then FIO2, then PEEP, then ABG
Answer: 1 - Decrease FIO2, then PEEP, then rate, then ABG
Explanations:
Always decrease FI02 first, then decrease PEEP and ventilator rate,
followed by a repeat ABG.
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Research Concepts:
Ventilator Management:
Choices:
1. Diabetes
2. Varicose veins
3. Thoracic surgery
4. Hypertension
Answer: 3 - Thoracic surgery
Explanations:
Hypercoagulability, oral contraceptive use, and deep venous stasis are
predisposing factors for PE.
Any surgery is a risk factor for PE.
Varicose veins on the legs are superficial, not deep, veins.
Neither diabetes nor hypertension are viewed as significant risk factors for
pulmonary embolism (good thing, as that would make PE even more
common than it is!).
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Research Concepts:
Pulmonary Embolism:
Choices:
1. Elevated mean arterial blood pressure
2. Elevated systolic blood pressure
3. Elevated diastolic blood pressure
4. Elevated peripheral vascular resistance
Answer: 3 - Elevated diastolic blood pressure
Explanations:
Mean arterial blood pressure is normally elevated with aging.
This is primarily caused by an elevated systolic blood pressure.
Diastolic blood pressure is usually not increased in the elderly.
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Research Concepts:
Blood Pressure, Age-related Changes:
Choices:
1. Small bowel
2. Stomach
3. Lung
4. Liver
Answer: 4 - Liver
Explanations:
Because of its location just underneath the xiphoid process, the liver is
likely to be damaged from physical pressure exerted over the xiphoid
process during CPR
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Research Concepts:
Cardiopulmonary Resuscitation:
Complications:
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Research Concepts:
Loop Diuretics:
Hypokalemia:
Choices:
1. It is systolic
2. It is grade I or II/VI
3. It does not radiate
4. It is holosystolic
Answer: 4 - It is holosystolic
Explanations:
Further evaluation should be prompted by a grade IV through VI murmur,
radiation, a diastolic murmur, a holosystolic murmur, or the presence of
other cardiac symptoms.
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Research Concepts:
Murmur:
Choices:
1. Troponin
2. Creatine kinase
3. Alkaline phosphatase
4. Aspartate aminotransferase
Answer: 3 - Alkaline phosphatase
Explanations:
Alkaline phosphatase is found in the biliary tree and in bone, not the
myocardium
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Research Concepts:
Myocardial Infarction, Serum Markers:
Choices:
1. Coarctation of the aorta
2. ASD
3. Mitral valve prolapse
4. Pulmonic stenosis
Answer: 3 - Mitral valve prolapse
Explanations:
Ehler-Danlos syndrome is a hereditary connective tissue disorder
Mitral valve prolapse is a common manifestation of this disease
The skin is unusually very elastic due to defect in collagen synthesis
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Research Concepts:
Ehlers-Danlos Syndrome:
Choices:
1. Increase oxygen demand
2. Increase heart rate
3. Decrease contractility
4. Decrease peripheral resistance
Answer: 3 - Decrease contractility
Explanations:
Cardioplegia solution decreases cardiac oxygen consumption, thereby
allowing for a greater length of time for surgical intervention.
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Research Concepts:
Cardioplegia:
Choices:
1. Indomethacin infusion
2. Prostaglandin E infusion
3. Adenosine infusion
4. Digoxin infusion
Answer: 2 - Prostaglandin E infusion
Explanations:
Some congenital heart diseases are dependent on patency of the ductus
Without a patent ductus some of cyanotic congenital heart diseases are not
compatible with life
Prostaglandin E infusion is used to keep the ductus open after birth
Otherwise the ductus closes spontaneously within 24 hours after birth
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Research Concepts:
Cyanotic Heart Disease:
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Research Concepts:
Heart Block, Third Degree:
Cannon A Waves:
Choices:
1. Lymphedema
2. Deep vein thrombosis
3. Superficial venous insufficiency
4. Cirrhosis
Answer: 3 - Superficial venous insufficiency
Explanations:
Venous insufficiency is the most common cause of unilateral leg edema,
whereas lymphedema is rare.
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Research Concepts:
Edema:
Venous Insufficiency:
Choices:
1. Intestinal contents coming out of the abdomen
2. Diaphragmatic hernia
3. Heart protruding out of the sternum
4. Large head
Answer: 3 - Heart protruding out of the sternum
Explanations:
Ectopic is a rare birth defect which is characterized by the heart protruding
outside the sternum.
The disorder is also associated with other anomalies and is usually fatal.
Ectopic cordis is a rare lesion often seen in patients with Turner syndrome
and trisomy 18.
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Research Concepts:
Ectopic Cordis:
Choices:
1. Trachea
2. Esophagus
3. Right bronchi
4. Left bronchi
Answer: 2 - Esophagus
Explanations:
A normal CO2 detector level is five percent at the end of an ET tube
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Research Concepts:
Carbon Dioxide Detector:
Tracheal Intubation:
Choices:
1. Decreased D-dimer
2. Hypocarbia
3. Increased platelets
4. Depressed prothrombin time
Answer: 2 - Hypocarbia
Explanations:
Patients with a pulmonary embolus will usually have tachypnea that will
manifest as hypocarbia. Initially, hypoxia may not be that pronounced.
The chest x-ray is often normal.
The D-dimer is increased.
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Research Concepts:
Pulmonary Embolism:
Choices:
1. Diabetics have more extensive coronary artery disease
2. Diabetics have more unstable lesions
3. Diabetics have less favorable long-term outcomes with coronary
revascularization (e.g. CABG, PTCA)
4. Diabetics are less likely to have peripheral vascular disease
Answer: 4 - Diabetics are less likely to have peripheral vascular disease
Explanations:
Medical treatment decisions for diabetics with UA/NSTEMI are very
similar to nondiabetics
Diabetes is a comorbidity in ~20% of patients with UA/NSTEMI
It is an independent predictor of adverse outcomes.
Coronary revascularization in diabetics has less favorable outcomes when
compared to nondiabetics
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Research Concepts:
Angina, Unstable:
Diabetes Mellitus:
Choices:
1. Patients with MI 30 minutes prior
2. Patients with CVA 5 months ago
3. Pregnant patients
4. Patients with a known AV malformation
Answer: 1 - Patients with MI 30 minutes prior
Explanations:
Thrombolic therapy of acute MI is most beneficial if initiated within the
first hour of onset
Common absolute contraindications include CVA less than 6 months, high
risk for internal bleeding, recent surgery, pregnancy, and known bleeding
disorder
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Research Concepts:
Thrombolytic Therapy:
Choices:
1. Thrombectomy
2. Heparin
3. Mechanical ventilation
4. Clopidogrel
Answer: 2 - Heparin
Explanations:
Treatment of pulmonary embolus include administration of thrombolytics
and heparin, and rarely insertion of an IVC filter.
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Research Concepts:
Heparin:
Pulmonary Embolism:
Choices:
1. Elevated PaCO2
2. Decreased A-a gradient
3. Right axis deviation
4. Decreased PO2
Answer: 4 - Decreased PO2
Explanations:
There is not a blood or serum test that can help make a diagnosis of PE.
Hypoxemia is a constant feature but is not very specific for PE.
The WBC count may be normal or elevated. Clotting parameters have no
prognostic value.
The D-dimer screen test is only useful if used in conjunction with clinical
assessment of patient. D-dimer may also be positive in infection, trauma,
and malignancies.
The initial chest x-ray in PE is almost always normal but sometimes may
show the Westermarck sign, dilated pulmonary vessels proximal to the clot
with collapse of distal vessels and a sharp cutoff.
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Research Concepts:
Pulmonary Embolism:
Choices:
1. Pes planus
2. Tetralogy of fallot
3. Sickle cell disease
4. Kartegener's syndrome
Answer: 2 - Tetralogy of fallot
Explanations:
Coeur en Sabot or a boot shaped heart is seen commonly in patients with
tetralogy of fallot.
Tetralogy of fallot is associated with a right to left shunt and cyanosis.
On x-ray, the pulmonary segment is usually small and concave suggesting
pulmonary stenosis or atresia.
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Research Concepts:
Tetralogy Of Fallot:
Choices:
1. V wave
2. X descent
3. C wave
4. A wave
Answer: 4 - A wave
Explanations:
The positive A wave is caused by the right atrial contraction transmitted to
the jugular veins during right atrial systole
Atrial relaxation is demonstrated by the descent of the A wave. This is
usually interrupted by the C wave
The X descent is a negative wave occurring in late systole secondary to the
delay in pulse transmission.
The v wave is the increase in right atrial and jugular venous pressure
secondary to continued inflow of blood to the venous system. It occurs in
late ventricular systole while the tricuspid valve is still closed.
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Research Concepts:
A Wave:
Choices:
1. Diabetes
2. Obesity
3. Prolonged ventilation
4. Rebleeding
Answer: 1 - Diabetes
Explanations:
All the above are risk factors for sternal wound infections, but the
association with diabetes is the strongest
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Research Concepts:
Post-op Wound Infection:
Choices:
1. Atenolol
2. Esmolol
3. Metoprolol
4. Nadolol
Answer: 4 - Nadolol
Explanations:
Non-selective beta-blockers are contraindicated in COPD due to their
bronchoconstriction effects
Only nadolol is a non selective beta blocker and therefore contraindicated
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Research Concepts:
Obstructive Pulmonary Disease, Chronic (COPD):
Beta-Blockers:
Choices:
1. Sedation
2. Respiratory depression
3. Nausea
4. Constipation
Answer: 4 - Constipation
Explanations:
Tolerance develops to most effects of morphine except to constipation and
miosis
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Research Concepts:
Morphine:
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Research Concepts:
Oxygen Toxicity:
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Research Concepts:
Thrombolytic Therapy:
Choices:
1. Coronary disease develops at a rate of 5% per year
2. Angina is the most common presenting symptom
3. CABG in post transplant has 50% mortality
4. Cytomegalovirus is the greatest infectious cause of developing coronary
disease
Answer: 3 - CABG in post transplant has 50% mortality
Explanations:
CAD develops at 10% per year and dyspnea on exertion is the most
common presentation
Epstein Barr virus is the most common cause of CAD in transplanted hearts
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Research Concepts:
Heart Transplantation:
Choices:
1. It occurs right after birth
2. It is the most common congenital cardiac anomaly
3. Membranous type VSDs can close spontaneously
4. It causes cyanosis
Answer: 2 - It is the most common congenital cardiac anomaly
Explanations:
VSD are the most common congenital cardiac anomalies in children
It usually becomes symptomatic in the first few months after birth
It rarely becomes symptomatic at birth because the pulmonary and system
pressure are almost equal so that left right shunting does not occur
Muscular type VSDs may close spontaneously, but not the membranous
types
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Research Concepts:
Ventricular Septal Defect:
Choices:
1. Renal parenchymal disease
2. Essential hypertension
3. Pheochromocytoma
4. Renal vascular disease
Answer: 2 - Essential hypertension
Explanations:
Essential hypertension is the most common cause of hypertension in
children
Family history of such disease is important since it often runs in families
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Research Concepts:
Essential Hypertension:
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Research Concepts:
Lidocaine:
Choices:
1. Niacin
2. Atorvastatin
3. Lisinopril
4. Colesevelam
Answer: 1 - Niacin
Explanations:
While atorvastatin, lisinopril and colesevelam have been shown to increase
HDL levels, the most effective is niacin.
Niacin can increase HDL by 30% but this has NOT been shown to reduce
cardiac mortality.
The major troublesome side effect is flushing.
This can be decreased by pretreating with aspirin.
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Research Concepts:
Niacin:
Choices:
1. Acute bleeding
2. Pregnancy
3. Aluminum toxicity
4. Thalassemia
Answer: 1 - Acute bleeding
Explanations:
Acute bleeding is associated with normochromic anemia
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Research Concepts:
Microcytic Hypochromic Anemia:
Choices:
1. Diuretics
2. Beta blockers
3. ACE inhibitors
4. All of the above
Answer: 4 - All of the above
Explanations:
Diuretics are one of the mainstays of treating CHF
Diuretics can cause hypokalemia and as a result patients require potassium
supplementation
Beta blockers are another mainstay of treatment and decrease mortality
rates
ACE inhibitors have been show to improve quality of life and mortality
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Research Concepts:
Heart Failure, Congestive:
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Research Concepts:
Postoperative Delirium:
Choices:
1. Pregnancy
2. Post myocardial infarction
3. Post prandial
4. After an overnight fast
Answer: 2 - Post myocardial infarction
Explanations:
Cholesterol levels will decrease following myocardial infarction
This decrease can persist up to weeks post infarction
Cholesterol levels are higher during pregnancy and during post-prandial
period
Cholesterol levels are low after an overnight fast
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Research Concepts:
Acute Myocardial Infarction:
Cholesterol Levels:
Choices:
1. Increased HDL
2. Decreased HDL
3. Increased LDL
4. Decreased LDL
Answer: 1 - Increased HDL
Explanations:
A 5 to 10 mg/dL increase in HDL should be expected in a patient who quits
smoking.
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Research Concepts:
Smoking Cessation:
High-density Lipoprotein:
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Research Concepts:
Cardiac Physiology:
Choices:
1. Procainamide
2. Lidocaine
3. Propranolol
4. Amiodarone
Answer: 4 - Amiodarone
Explanations:
Amiodarone shares the properties of all the major classes of antiarrhythmics
Antiarrhythmics are classified based on their main mechanism of action
Propranolol is a class two and procainamide is a class three
Lidocaine is a class one antiarrhythmic drug
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Research Concepts:
Amiodarone:
Choices:
1. Chylothorax
2. Pneumothorax
3. Air embolism
4. Hematoma
Answer: 1 - Chylothorax
Explanations:
The thoracic duct empties in the left side only
The right lymphatic duct is less likely to be traumatized from a central line
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Research Concepts:
Central Line Placement:
Choices:
1. Angina pectoris
2. Pulmonary embolism
3. Costochondritis
4. Gastroesophageal reflux disease
Answer: 2 - Pulmonary embolism
Explanations:
The symptoms of pulmonary embolism are least likely to resemble
esophageal spasms
Other conditions that might mimic esophageal spasms are diabetic
neuropathy, esophageal cancer, achalasia, esophageal diverticula, strictures,
webs, and rings
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Research Concepts:
Pulmonary Embolism:
Esophageal Spasm:
Choices:
1. Muscle mass
2. Age
3. Gender
4. Hydration status
Answer: 4 - Hydration status
Explanations:
The normal range for creatinine clearance values is 100 - 125 ml / minute /
1.73 m2
Creatinine level is higher in males and varies according to muscle mass
The creatinine clearance decreases with age
Hydration status affects levels of BUN but creatinine clearance remains
relatively constant
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Research Concepts:
Creatinine Clearance:
Choices:
1. Paroxysmal ventricular tachycardia
2. Paroxysmal supraventricular tachycardia
3. Wolff-Parkinson-White syndrome
4. Atrial fibrillation
Answer: 3 - Wolff-Parkinson-White syndrome
Explanations:
Cardiac depolarization from the atria to the ventricles normally occurs via
the atrioventricular node-bundle of His-Purkinje system.
Patients with WPW syndrome have accessory AV conduction via a bypass
tract.
This results in preexcitation of the ventricles and tachycardia.
Radiofrequency ablation of the accessory pathway is the definitive
treatment.
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Research Concepts:
Wolff-Parkinson-White Syndrome:
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Research Concepts:
Positive End-Expiratory Pressure (PEEP):
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Research Concepts:
Toxicity, Lidocaine:
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Research Concepts:
Cellulitis:
Choices:
1. Can increase levels of simvastatin
2. Can increase levels of lovastatin
3. Can increase levels of pravastatin
4. Can increase levels of atorvastatin
Answer: 3 - Can increase levels of pravastatin
Explanations:
Pravastatin is the only statin with minimal to no metabolism by the
cytochrome P450 system
Amiodarone inhibits the cytochrome P450 enzyme system
As a result, it can increase serum levels of simvastatin, lovastatin and
atorvastatin
It does not increase levels of pravastatin
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Research Concepts:
Amiodarone:
Statin Medication:
Drug Interactions:
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Question 938: How many hours after admission is nosocomial pneumonia
defined according to the Center for Disease Control?
Choices:
1. 24
2. 48
3. 72
4. None of the above
Answer: 3 - 72
Explanations:
A nosocomial pneumonia is one defined as occurring >72 hours post-
admission
Other names include hospital-acquired pneumonia or health care-associated
pneumonia
It is the second most common nosocomial infection
It is typically bacterial in origin
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Research Concepts:
Nosocomial Pneumonia:
Choices:
1. IV lidocaine
2. IV epinephrine
3. Pacemaker placement
4. Electrical cardioversion
Answer: 3 - Pacemaker placement
Explanations:
When complete heart block occurs following an acute MI, a pacemaker is
needed.
On ECG, complete heart block is diagnosed by P waves and QRS
complexes that are dissociated, indicating that the atria and ventricles are
operating independently.
Lidocaine is contraindicated in this situation because it may cause asystole
due to its ability to suppress the ventricular pacemaker.
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Research Concepts:
Heart Block, Third Degree:
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Research Concepts:
Cardiac Tamponade:
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Research Concepts:
Tetralogy Of Fallot:
Choices:
1. Hypertension
2. Atrial fibrillation
3. Mitral regurgitation
4. Enlarge left ventricle
Answer: 2 - Atrial fibrillation
Explanations:
Untreated mitral stenosis leads to enlargement of left atrium
Leads to risk of atrial fibrillation
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Research Concepts:
Mitral Stenosis:
Atrial Fibrillation:
Choices:
1. 10%, mild tachycardias, normal capillary refill, and clear sensorium
2. 15%, tachycardia, normotensive with widened pulse pressure, decreased
level of consciousness
3. 20%, tachycardia without palpable pulses, clear sensorium
4. 30%, tachycardia, normotensive, clear sensorium
Answer: 1 - 10%, mild tachycardias, normal capillary refill, and clear
sensorium
Explanations:
Class I shock has 15% loss of blood volume may be asymptomatic or have
mild tachycardia
Class II shock has a 15 to 30% blood loss, tachycardia, anxiety, and is
normotensive with increased pulse pressure
Class III shock has 30 to 40% blood loss, tachycardia, hypotension, and
confusion
Class IV shock has >40% blood loss, tachycardia, hypotension, and a
decreased level of consciousness
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Research Concepts:
Hemorrhage:
Choices:
1. Left anterior descending
2. Posterior descending
3. Circumflex artery
4. Marginal artery
Answer: 3 - Circumflex artery
Explanations:
The circumflex coronary artery is a branch of the left main coronary artery.
It travels in the groove that separates the left atrium from the left ventricle.
It supplies the left atrium and the left ventricle.
It can give rise to one or more diagonal or marginal arteries.
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Research Concepts:
Coronary Artery Anatomy:
Choices:
1. Diastolic pressure
2. Pulse
3. Ventricular contractility
4. Ventricular wall tension
Answer: 1 - Diastolic pressure
Explanations:
The three major determinants of myocardial oxygen demand are heart rate,
contractility, and wall tension
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Research Concepts:
Myocardial Oxygen Demand:
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Research Concepts:
Cardiac Tamponade:
Choices:
1. Midsternum
2. Right posterior
3. Right midclavicular
4. Right apex
Answer: 3 - Right midclavicular
Explanations:
The right middle lobe is located on the right side and is situated
anteroinferior.
Auscultation is best heard at the right anterior midclavicular line.
It can also be auscultated around the right midaxillary line.
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Research Concepts:
Lung Exam:
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Research Concepts:
Hyperkalemia:
Choices:
1. Fibroblasts
2. Macrophages
3. Neutrophils
4. Mast cells
Answer: 3 - Neutrophils
Explanations:
The first phase of wound healing is the inflammatory phase.
The inflammatory phase lasts 24-48 hours and is characterized by an influx
of neutrophils.
The neutrophils remove debris and bacteria from the wound so as to allow
collagen synthesis to begin.
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Research Concepts:
Wound Healing Phases:
Choices:
1. Furosemide
2. Hydrochlorothiazide
3. Amiloride
4. Acetazolamide
Answer: 1 - Furosemide
Explanations:
The loop of Henle is found between the proximal and distal tubules
The thick ascending limb of loop of Henle is impermeable to water and
permeable to electrolytes
Furosemide acts on this site to inhibit absorption of electrolytes and
subsequent diuresis
Loop diuretics are common causes of electrolyte imbalance
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Research Concepts:
Furosemide:
Choices:
1. Every minute
2. Every five minutes
3. Every fifteen minutes
4. Every twenty minutes
Answer: 3 - Every fifteen minutes
Explanations:
Vitals are normally taken every fifteen minutes in the PACU.
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Research Concepts:
Postoperative Recovery:
Choices:
1. 50 percent
2. 25 percent
3. 12 percent
4. 6 percent
Answer: 3 - 12 percent
Explanations:
For every half-life, 50 percent of the drug remains
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Research Concepts:
Drug Elimination:
Choices:
1. Hyaline cartilage
2. Smooth muscle
3. Ciliated epithelial cells
4. Clara cells
Answer: 1 - Hyaline cartilage
Explanations:
Hyaline cartilage is not present at terminal bronchioles
Clara cells are non-ciliated bronchiolar cells
Terminal bronchioles also have ciliated epithelial cells and smooth muscle
cells
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Research Concepts:
Lung Anatomy:
Choices:
1. Fever is a signal that there is mismatch of blood transfusion
2. Fever is caused by antibodies towards white cells
3. Fever is more common with platelet transfusions than red cell transfusions
4. Fever does not occur if cold blood is administered
Answer: 4 - Fever does not occur if cold blood is administered
Explanations:
Febrile reactions are caused by recipient antibodies towards white cell
antigens or fragments.
Fever is usually more common with platelets than with RBC transfusions.
Fever may be the initial sign that a hemolytic reaction is occurring. If chills
and hypotension occur, the transfusion should be immediately discontinued.
In some individuals, febrile reactions can be stopped by giving leukocytes
filtered blood.
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Research Concepts:
Transfusion Reactions:
Choices:
1. Verapamil
2. Digoxin
3. Isoproterenol
4. Theophylline
Answer: 4 - Theophylline
Explanations:
Bothe caffeine and adenosine bind to the same receptor. The
pharmacological effect of adenosine can be terminated by methylxanthine
or theophylline.
Adenosine is contraindicated in asthmatics, atrial fibrillation, or atrial
flutter
Side effects of adenosine include facial flushing, rash on chest, diaphoresis
or lightheadedness. Metallic taste is very common with adenosine.
Adenosine is broken down by adenosine deaminase in red blood cells.
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Research Concepts:
Adenosine:
Choices:
1. Succinylcholine
2. Halothane
3. Curare
4. Atracurium
Answer: 1 - Succinylcholine
Explanations:
Succinylcholine can cause malignant hyperthermia.
Malignant hyperthermia is associated with the inability of the body to
remove carbon dioxide. It is also associated with fever, circulatory collapse,
and muscle rigidity.
Malignant hyperthermia is an autosomal dominant disorder, but there is no
simple test to determine susceptibility.
Dantrolene is often used for the treatment of malignant hyperthermia.
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Research Concepts:
Malignant Hyperthermia:
Choices:
1. Decreased coronary perfusion
2. Decreased myocardial oxygen consumption
3. End diastolic pressure equalization between the left ventricle and the aorta
4. Left ventricular hypertrophy
Answer: 2 - Decreased myocardial oxygen consumption
Explanations:
With severe aortic regurgitation the ventricle initially hypertrophies
This leads to increased myocardial oxygen consumption
The thickened myocardium causes back pressure decreasing coronary
perfusion
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Research Concepts:
Aortic Regurgitation:
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Research Concepts:
Right Coronary Artery:
Choices:
1. Atrial septal defect
2. Ventricular septal defect
3. Coarctation of aorta
4. Tetralogy of fallot
Answer: 3 - Coarctation of aorta
Explanations:
Untreated coarctation usually leads to development of collaterals.
These collaterals involve the intercostal arteries, which run underneath the
rib and form notches over time. Tetralogy of Fallot can also cause rib
notching, but much less commonly.
Rib notching may also be seen in neurofibromatosis, a result of developing
intercostal nerve neurofibromas.
Venous causes of rib notching would include superior vena cava
obstruction.
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Research Concepts:
Aortic Coarctation:
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Research Concepts:
Carotid Massage:
Choices:
1. Dopamine
2. Norepinephrine
3. Epinephrine
4. Isoprenaline
Answer: 3 - Epinephrine
Explanations:
Many alpha-adrenergic drugs have been used for ACLS.
Today, epinephrine has been proven to be the most successful.
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Research Concepts:
Cardiopulmonary Resuscitation:
Choices:
1. Hypertrophic cardiomyopathy
2. Restrictive cardiomyopathy
3. Dilated cardiomyopathy
4. Infective endocarditis
Answer: 3 - Dilated cardiomyopathy
Explanations:
Congestive or dilated cardiomyopathy can be caused by alcohol abuse
Adriamycin can cause the same condition
Infective endocarditis is often associated with IV drug abuse
Mutations in genes encoding contractile proteins results in hypertrophic
cardiomyopathy
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Research Concepts:
Alcohol And Substance Abuse:
Cardiomyopathy, Dilated:
Choices:
1. Hypertension
2. Aortic stenosis
3. Ventricular fibrillation
4. Atrial flutter
Answer: 3 - Ventricular fibrillation
Explanations:
Cardiac fibromas commonly present with ventricular arrhythmias
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Research Concepts:
Cardiac Fibroma:
Choices:
1. Diltiazem
2. Lisinopril
3. Amlodipine
4. Amiodarone
Answer: 2 - Lisinopril
Explanations:
Ace Inhibitors are effective for CHF as they reduce preload and afterload
They affect the renin-angiotensin-renin system
Other medications used for long term are beta blockers, spironolactone, and
digoxin
In African-Americans the combination of hydralazine and isosorbide has
been proven to be of benefit
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Research Concepts:
Heart Failure, Congestive:
Choices:
1. Right bundle branch block
2. Prior myocardial infarction
3. Prior revascularization (PTCA or CABG)
4. Congestive heart failure
Answer: 3 - Prior revascularization (PTCA or CABG)
Explanations:
Exercise myocardial perfusion imaging or exercise echocardiography is
recommended in patients with prior revascularization
The same is recommended in patients with intermediate pretest probability
of CAD with WPW syndrome or >1 mm of rest ST segment depression
Adenosine or dipyridamole myocardial perfusion imaging in patients with
electronically paced ventricular rhythm or LBBB
CHF or RBBB are not indications for cardiac stress imaging
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Research Concepts:
Cardiac Stress Imaging:
Choices:
1. Tachycardia
2. Sweating
3. High oxygen consumption
4. Hypertension
Answer: 3 - High oxygen consumption
Explanations:
Post-operative hypothermia leads to muscle shivering, which increases
oxygen consumption.
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Research Concepts:
Hypothermia:
Choices:
1. Down
2. Williams
3. Turners
4. Ebstein
Answer: 2 - Williams
Explanations:
Supravalvular aortic stenosis is a rare medical disorder that is often seen in
patients with William syndrome
William syndrome consists of elfin faces, hypercalcemia and peripheral
pulmonary artery stenosis
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Research Concepts:
Williams Syndrome:
Choices:
1. Patient
2. Physician
3. Nurse
4. Pain Doctor
Answer: 1 - Patient
Explanations:
Self-reporting is the most valid assessment of pain level
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Research Concepts:
Pain Assessment:
Choices:
1. Headache
2. Fatigue
3. Muscle weakness
4. Tinnitus
Answer: 4 - Tinnitus
Explanations:
Digitalis toxicity can be acute or chronic
Acute toxicities commonly appear as new forms of arrhythmia
Chronic digoxin toxicities commonly present with muscle weakness,
fatigue and headache
Tinnitus more commonly seen with quinidine toxicity
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Research Concepts:
Digoxin Toxicity:
Choices:
1. Hyperplasia
2. Hypertrophy
3. Apoptosis
4. Metaplasia
Answer: 2 - Hypertrophy
Explanations:
An increase in the size of an organ is due to increased cell size.
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Research Concepts:
Cardiomyopathy, Hypertrophic:
Choices:
1. Blood products
2. Crystalloid fluids
3. Inotropic medications
4. Surgery
Answer: 2 - Crystalloid fluids
Explanations:
The most appropriate initial management of hypovolemic shock is the
administration of crystalloid fluids.
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Research Concepts:
Shock, Hypovolemic:
Choices:
1. Health status of patient
2. Amount of air
3. Pulmonary function
4. Site of air entry
Answer: 4 - Site of air entry
Explanations:
The amount of air and the status of the patient are the most important
factors in determining the outcome.
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Research Concepts:
Venous Air Embolism:
Choices:
1. 2 L/min O2 per nasal cannula
2. Administration of theophylline
3. 50% O2 via Venturi mask
4. None of the above
Answer: 3 - 50% O2 via Venturi mask
Explanations:
Administering high concentration O2 therapy to a COPDer can lead to
hypoventilation and eventually apnea
Due to chronically high PCO2 levels, they have little or no respiratory
response to rising levels
Paradoxically, they have to rely on low PO2 levels to stimulate respiration
Increasing PO2 with O2 therapy, especially at high concentrations, will
decrease respiratory rates and may lead to respiratory arrest
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Research Concepts:
Emphysema, Chronic:
Choices:
1. Arrhythmia
2. Asystole
3. Perforation
4. Clot
Answer: 3 - Perforation
Explanations:
Catheter in the right atrium can lead to perforation
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Research Concepts:
Cardiac Catheterization:
Choices:
1. Atrial septal defect
2. Ventricular septal defect
3. Patent ductus
4. Pulmonary stenosis
Answer: 4 - Pulmonary stenosis
Explanations:
Patients with pulmonary stenosis can have aortic valve replacement.
Ddirect communication between arterial and venous side are
contraindications to surgery.
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Research Concepts:
Aortic Valve:
Choices:
1. The child should avoid isometric exercises
2. The child can be involved in any sport without concern
3. The child should avoid swimming due to the risk of syncope
4. The child should avoid competitive running but other sports are acceptable
Answer: 2 - The child can be involved in any sport without concern
Explanations:
A small VSD should not impact the child and there should be no restrictions
Some would recommend an ECG to screen for pulmonary hypertension
The murmur of VSD is harsh and holosystolic best hear at the left lower
sternal border
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Research Concepts:
Ventricular Septal Defect:
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Research Concepts:
Wound Dehiscence:
Choices:
1. Wash skin surrounding patch with rubbing alcohol
2. Patch should be removed after 30 days
3. Smoking while wearing a nitrate patch is harmful
4. Patch should be removed for a period of time each day to avoid tolerance to
nitrates
Answer: 4 - Patch should be removed for a period of time each day to avoid
tolerance to nitrates
Explanations:
Patients who consistently rely on nitrates to manage their angina symptoms
can develop tolerance to nitrates.
Tolerance is best avoided by having the patient remove the nitrate patch for
10 to 12 hours each day.
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Research Concepts:
Nitroglycerin Patch:
Choices:
1. Renal perfusion
2. Limb perfusion
3. Myocardial perfusion
4. Brain perfusion
Answer: 4 - Brain perfusion
Explanations:
Even though cardiopulmonary resuscitation is done to restart the heart, the
major purpose is to get blood flowing back to the brain, which is vital for
survival.
Prompt cardiopulmonary resuscitation can prevent hypoxic injury and
prevent tissue death.
On average, only 5-10% of people who receive cardiopulmonary
resuscitation survive. Studies have shown that defibrillation within 3-5
minutes of sudden ventricular fibrillation cardiac arrest can improve
survival.
Many protocols now downplay the importance of artificial respiration and
focus more on the chest compressing activity.
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Research Concepts:
Cardiac Arrest:
Choices:
1. Increase oxygen
2. Observe
3. Increase rate
4. Increase tidal volume
Answer: 2 - Observe
Explanations:
A tidal volume of 5-7 cc/kg is now recommended for patients on
mechanical ventilation. Some patients with neuromuscular disease may
benefit from high tidal volumes. The patient above has normal values and
should be observed.
The inhalation/exhalation ratio can be adjusted and is normally set at 1:3.
Patients with chronic obstructive pulmonary disease or with asthma should
have ratios of 1:4.
Fi02 is initially set at 1.0 but gradually decreased to the lowest level
necessary to maintain an oxygenation saturation of greater than 95%.
Positive end-expiratory pressure (PEEP) is set at 5 cm H2O, but in acute
respiratory distress syndrome it can be increased to 8 or more. PEEP also
increases intra-thoracic pressure and impedes venous return. This can be
countered by giving more volume to the patient.
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Research Concepts:
Ventilator Management:
Choices:
1. Quinidine
2. Disopyramide
3. Lidocaine
4. Procainamide
Answer: 3 - Lidocaine
Explanations:
Class one antiarrhythmics commonly cause QT prolongation and torsade de
pointes
Lidocaine is also a class one antiarrhythmic but does not cause QT
prolongation
Quinidine, disopyramide, and procainamide are class one antiarrhythmics
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Research Concepts:
Antiarrhythmic Medication:
Lidocaine:
Choices:
1. When they are at risk for an MI
2. Patients with right ventricular dysfunction
3. When their oxygen saturation is below 90%
4. If they are not on warfarin
Answer: 2 - Patients with right ventricular dysfunction
Explanations:
Fibrinolytic therapy is suggested for patients with PE if they are
hemodynamically unstable and/or have right ventricular dysfunction
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Research Concepts:
Pulmonary Embolism:
Thrombolytic Therapy:
Choices:
1. Theophylline
2. Antihistamine
3. Prednisone
4. Aspirin
Answer: 4 - Aspirin
Explanations:
Aspirin taken with niacin decreases the side effect of facial flushing.
Caffeine, carbohydrates and water do not impact flushing.
Some studies have shown that niacin does not decrease cardiovascular risk
when added to statin therapy.
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Research Concepts:
Niacin:
Choices:
1. Tetracycline
2. Fluoroquinolones
3. Macrolides
4. Cephalosporins
Answer: 2 - Fluoroquinolones
Explanations:
Fluoroquinolones are contraindicated in children and pregnant mothers
Damage to growing cartilage by Fluoroquinolones can cause growth
problems
Tetracycline is also contraindicated in children and pregnant mothers
because it can stain growing bones
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Research Concepts:
Quinolones:
Choices:
1. Unethical treatment
2. Protocol
3. Futile
4. Experimental
Answer: 3 - Futile
Explanations:
Treatment unlikely to assist the patient in their care is considered futile
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Research Concepts:
Futile Treatment:
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Research Concepts:
Ezetimibe:
Explanations:
Prolonged aortic coarctation causes rib notching via intercostal arterial
dilation.
The chronic cases result in development of collaterals usually from the
internal mammary and intercostal arteries,
These collateral from just beneath the 4-8th ribs and cause notching of the
ribs along the inferior rib margin (where the intercostal artery, vein, and
nerve are found).
Superior rib notching can be seen in patients with polio, osteogenesis
imperfecta and certain collagen vascular disorders.
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Research Concepts:
Aortic Coarctation:
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Research Concepts:
Pulmonary Venoocclusive Disease:
Choices:
1. Digoxin
2. Verapamil
3. Amiodarone
4. Quinidine
Answer: 2 - Verapamil
Explanations:
Rate control is the goal of long-term management in most patients in whom
restoration of normal sinus rhythm cannot be achieved.
Calcium channel blockers and beta-blockers are the preferred drugs.
Digoxin is a second-line therapy because of its side effects and lower
efficacy.
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Research Concepts:
Atrial Fibrillation:
Choices:
1. 12 hours prior
2. 12 hour after
3. Immediately before
4. After surgery
Answer: 3 - Immediately before
Explanations:
Antibiotic is best to be given right before surgery
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Research Concepts:
Preoperative Prophylactic Antibiotics:
Choices:
1. Metoprolol
2. Digoxin
3. Lidocaine
4. Adenosine
Answer: 3 - Lidocaine
Explanations:
Lidocaine blocks sodium channels.
It is a class IB antiarrhythmic agent that shortens the action potential.
It should not be used in 2nd or 3rd degree heart block unless there is a
pacemaker.
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Research Concepts:
Arrhythmias:
Lidocaine:
Choices:
1. It has no phase 1 or phase 2
2. The resting potential is a constant -70mV
3. The SA node is the pacemaker of the heart
4. The SA node has an inward sodium current in phase 4
Answer: 2 - The resting potential is a constant -70mV
Explanations:
The pacemaker of the heart is the SA node
Phase 0 is caused by an increase in calcium conductance and is an upstroke
There is no phase 1 or 2
Phase 3 is the repolarization cause by an increase in potassium current
outward
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Research Concepts:
SA Node:
Choices:
1. Patent ductus arteriosus
2. Ventricular septal defect
3. Aortopulmonary window
4. Atrial septal defect
Answer: 4 - Atrial septal defect
Explanations:
Atrial septal defects generally do not present with congestive heart failure
at this age
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Research Concepts:
Heart Failure, Congestive:
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Research Concepts:
Aortic Regurgitation:
Cardiomyopathy, Hypertrophic:
Choices:
1. Tetralogy of Fallot
2. Coarctation of aorta
3. Atrial septal defect
4. Transposition of the great vessels
Answer: 1 - Tetralogy of Fallot
Explanations:
Most patients with congenital cyanosis after the age of 2 years have
tetralogy of Fallot.
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Research Concepts:
Tetralogy Of Fallot:
Choices:
1. Metoprolol
2. Captopril
3. Diltiazem
4. Alpha methyldopa
Answer: 1 - Metoprolol
Explanations:
Beta-blockers should be used with caution in asthmatics.
Side effects of beta-blockers include bronchospasm, bradycardia, and
nightmares.
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Research Concepts:
Beta-Blockers:
Choices:
1. Hypotension
2. Back pain
3. Bleeding tendency
4. Muscle rigidity
Answer: 4 - Muscle rigidity
Explanations:
Hemolytic transfusion reactions have many symptoms and may include
fever, chills, flushing, burning at site of IV, chest tightness, apprehension,
back pain, and hypotension.
Hypocalcaemia can occur from multiple transfusions and can present with
circumoral tingling and tremors of skeletal muscles.
All donor blood is screened for hepatitis, Human immunodeficiency virus I
and II, Human T-Lymphotropic virus I and II, Syphilis, Chagas disease,
hepatitis B and C, and West Nile virus. Not all donors are screened for
cytomegalovirus.
Lab findings of hemolytic reactions include high bilirubin, free
hemoglobin, hemoglobinuria, eosinophilia, and elevated liver enzymes.
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Research Concepts:
Transfusion Reactions:
Choices:
1. Obesity
2. Atherosclerosis
3. Alcohol
4. Smoking
Answer: 1 - Obesity
Explanations:
Obesity is not an independent risk factor for CAD
It does affect the other independent risk factors for CAD
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Research Concepts:
Risk Factors For Coronary Artery Disease:
Choices:
1. Regular exercise
2. Alcohol
3. Cigarette smoking
4. Statins
Answer: 3 - Cigarette smoking
Explanations:
Smoking is the number one factor implicated in the pathogenesis of
atherosclerosis.
Smoking is a modifiable risk factor.
Evidence indicates that smoking increases the risk of atherosclerosis by
200% over 2-5 years.
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Research Concepts:
Smoking:
Atherosclerosis:
Choices:
1. Penicillin
2. Vancomycin
3. Doxycycline
4. Streptomycin
Answer: 2 - Vancomycin
Explanations:
Vancomycin is the drug of choice for methicillin-resistant staphylococcus
aureus.
Vancomycin is bactericidal.
Vancomycin is excreted in the kidney and thus levels of the antibiotic need
to be monitored.
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Research Concepts:
Methicillin Resistant Staphylococcus Aureus (MRSA):
Choices:
1. Survival is the same at 5 years.
2. Survival is identical in diabetic and non-diabetic patients.
3. The efficacy of stents has yet to determined.
4. The effect of stents or minimally invasive surgery is to be determined.
Answer: 2 - Survival is identical in diabetic and non-diabetic patients.
Explanations:
CABG has a survival advantage for diabetic patients.
The outcome of invasive revascularization is depend on patient
characteristics including cardiac function, the number of diseased vessels,
and coronary disease distribution.
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Research Concepts:
Coronary Artery Bypass Graft:
Choices:
1. Patent ductus arteriosus
2. Tetralogy of Fallot
3. Transposition of the great vessels
4. Ventricular septal defect
Answer: 3 - Transposition of the great vessels
Explanations:
Early cyanosis and a normal sized heart can be seen with transposition of
the great vessels
One third of patients have the classic egg on a string x-ray
Right axis deviation and RVH are seen
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Research Concepts:
Transposition Of The Great Arteries:
Choices:
1. Oral potassium
2. Cardiac monitoring
3. Intravenous fluids with potassium
4. Intravenous glucose and insulin
Answer: 4 - Intravenous glucose and insulin
Explanations:
Intravenous glucose and insulin are treatment for hyperkalemia
Potassium can be given orally or intravenously at a slow rate (0.1-0.2
mEq/kg/h)
Cardiac monitoring for arrhythmias is appropriate
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Research Concepts:
Hypokalemia:
Choices:
1. The patient needs cardiac transplantation
2. Curative therapy is nifurtimox
3. The patient will have spontaneous recovery
4. Beta blockade is necessary
Answer: 1 - The patient needs cardiac transplantation
Explanations:
Chronic Chagas disease can cause severe cardiac disease
It is caused by trypanosomiasis, which in Central or South America can
cause cardiomyopathy and conduction delays
The conduction delay is most commonly right bundle branch block
Medical therapy with nifurtimox is only beneficial in early disease
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Research Concepts:
Chagas Disease (American Trypanosomiasis):
Choices:
1. 1 joule/kg
2. 2 joules/kg
3. 4 joules/kg
4. 5 joules/kg
Answer: 2 - 2 joules/kg
Explanations:
The initial pediatric standard defibrillating dosage of energy is 2 joules/kg
Subsequent defibrillation attempts should be 4 joules/kg
Ventricular fibrillation is uncommon in infants <1 year of age
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Research Concepts:
Defibrillation And Cardioversion:
Choices:
1. Mental status
2. Chest pain
3. Temperature
4. Skin rashes
Answer: 2 - Chest pain
Explanations:
Observing the patient for chest pain is an assessment priority
Occlusion of an obstructed coronary artery is not unusual
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Research Concepts:
Thrombolytic Therapy:
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Research Concepts:
Sinus Bradycardia:
Choices:
1. 1-2
2. 2-3
3. 3-4
4. None of the above
Answer: 2 - 2-3
Explanations:
During AF, the atria contract chaotically and irregularly when compared to
the ventricles
The INR goal for anticoagulation in a patient with AF is 2-3
The goal of long-term anticoagulation in a patient with AF is to reduce
thromboembolism risk
Patients with AF have a 5X higher risk for stroke than those in sinus rhythm
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Research Concepts:
Atrial Fibrillation:
Choices:
1. Bradypnea
2. Somnolence
3. Hyperventilation
4. Hypoventilation
Answer: 3 - Hyperventilation
Explanations:
Hyperventilation causes respiratory alkalosis.
This can result from anxiety, pulmonary embolism, or mechanical
ventilation at too high a rate.
The other conditions listed are more likely to cause respiratory acidosis.
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Research Concepts:
Hyperventilation:
Respiratory Alkalosis:
Choices:
1. Stat portable chest x-ray
2. Fluid bolus
3. Needle decompression
4. Bedside ultrasound
Answer: 3 - Needle decompression
Explanations:
The patient most likely has iatrogenic tension pneumothorax
Decompression is urgent. Radiologic procedures are too time consuming
There is debate as to whether the decompression catheter should be placed
in the second rib interspace at the midclavicular line or in the fifth
intercostal space at the anterior axillary line
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Research Concepts:
Iatrogenic Pneumothorax:
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Research Concepts:
Cardiac Tamponade:
Choices:
1. Heart rate
2. Contractility
3. Parasympathetic input
4. Oxygen consumption
Answer: 3 - Parasympathetic input
Explanations:
The sympathetic nervous system opposes the parasympathetic nervous
system.
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Research Concepts:
Sympathetic Nervous System:
Choices:
1. Ionic agents for all patients
2. Low osmolar, nonionic agents in all patients
3. Low osmolar contrast in patients with CHF, renal failure, or documented
allergy
4. Ionic agents for all elective cases after pre-medication with
diphenhydramine and steroids
Answer: 2 - Low osmolar, nonionic agents in all patients
Explanations:
Soon after non-ionic, and then low-osmolar contrast agents came on the
market, many selective-use protocols were attempted at numerous
institutions.
They generally failed because too many exceptions were made for
individuals who did not meet strict criteria, putting the institution at legal
risk if others had a reaction.
Over time, prices fell as supply and competition increased, so it is now
routine for all patients to receive low osmolar non-ionic contrast agents.
While diphenhydramine (Benadryl) has a clear role in treatment of minor
contrast reactions, there is no clear evidence it is helpful prophylactically,
given as a preparation agent prior to contrast administration.
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Research Concepts:
Nonionic Contrast Dye:
Choices:
1. Varicose veins
2. Obesity
3. Infection
4. Male sex
Answer: 4 - Male sex
Explanations:
Other risk factors include malignancy, oral contraceptives, long surgical
duration, genetic hypercoagulability
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Research Concepts:
Deep Venous Thrombosis Risk Factors:
Choices:
1. It occurs in 1-2% of the population
2. All valves become calcific over time
3. Bacterial endocarditis can occur
4. It is associated with dissection of the descending thoracic aorta
Answer: 2 - All valves become calcific over time
Explanations:
Bicuspid aortic valves are the most common cardiac anomaly and occur in
1-2% of the population.
Fibrocalcific changes occur by the age of 30.
Stenotic valves in childhood rarely occur, but may necessitate a valvotomy
and a possible valve replacement later on. These valves are prone to
endocarditis.
Bicuspid valves are associated with dissection of the ascending aorta during
valve replacement. The incidence is unknown.
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Research Concepts:
Aortic Valve:
Choices:
1. Mean arterial pressure (MAP)
2. Central venous pressure (CVP)
3. Pulse pressure (PP)
4. Cardiac output (CO)
Answer: 3 - Pulse pressure (PP)
Explanations:
SVR is MAP minus CVP divided by CO.
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Research Concepts:
Systemic Vascular Resistance:
Choices:
1. Adverse effect of opioid drugs
2. Hypovolemia
3. Urinary tract obstruction
4. Bowel obstruction
Answer: 2 - Hypovolemia
Explanations:
Normal urine output is about 1-2 ml/kg/hr
Signs of hypovolemia should be checked in all patients
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Research Concepts:
Hypovolemia:
Postoperative Management:
Choices:
1. Large IV
2. Subclavian central line
3. Femoral
4. Arterial
Answer: 2 - Subclavian central line
Explanations:
Central line close to the heart is most favorable during emergency
Second choice is intravenous.
If no other route is available an endotracheal tube can be used for naloxone,
atropine, valium (diazepam), epinephrine, and lidocaine (NAVEL).
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Research Concepts:
Advanced Cardiac Life Support:
Choices:
1. 1 mSv
2. 33 mSv
3. 50 mSv
4. 170 mSv
Answer: 3 - 50 mSv
Explanations:
The total maximum permissible radiation dose exposure is 50 mSv per year.
Sievert is the new unit of measurement for radiation biological effect,
replacing the Rem.
100 rem = 1 Sievert.
In the older terminology, the maximum is therefore 5000 mRem, or 5 Rem
per year.
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Research Concepts:
Ionizing Radiation Exposure:
Choices:
1. Adenosine
2. Beta blockers
3. Calcium channel blockers
4. Digoxin
Answer: 1 - Adenosine
Explanations:
The positive inotropic effects of catecholamines is blocked by adenosine
slowing conduction at the AV node
Side effects include dizziness and chest pain
Adenosine is contraindicated in patients on theophylline
Calcium channel blockers are second line
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Research Concepts:
Paroxysmal Supraventricular Tachycardia:
Choices:
1. Angiography
2. Echocardiogram
3. MRI
4. Nuclear scan
Answer: 2 - Echocardiogram
Explanations:
The above is caused by mitral stenosis
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Research Concepts:
Mitral Stenosis:
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Research Concepts:
Hypertension:
Choices:
1. Autoimmunity
2. Myocardial infarction
3. Viral infection
4. Uremia
Answer: 1 - Autoimmunity
Explanations:
Autoimmunity is less likely to cause fibrinous pericarditis than serous
pericarditis
Viral infection, uremia, myocardial infarction, and rheumatic fever all cause
fibrinous pericarditis
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Research Concepts:
Fibrinous Pericarditis:
Choices:
1. Increased liver microsomal P450 enzyme activity
2. Decreased body fat
3. Depressed renal function
4. Gastroparesis
Answer: 3 - Depressed renal function
Explanations:
Renal function is expected to decrease with age.
Renal and liver blood flow decreases with age. There is a reduction in total
body water.
This all contributes to drug toxicities in the elderly.
Drug doses should be adjusted according to renal functions.
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Research Concepts:
Renal Insufficiency:
Normal Aging:
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Question 1025: To avoid damage to the sciatic nerve, intramuscular
injections should be given at which gluteal region?
Choices:
1. Lower medial quadrant
2. Lower lateral quadrant
3. Upper lateral quadrant
4. Upper medial quadrant
Answer: 3 - Upper lateral quadrant
Explanations:
The sciatic nerve begins in the lower back and runs through the buttock and
down the lower limb.
To avoid damage to this nerve, the intramuscular injections should be given
at upper lateral quadrant.
Sciatica is pain in the distribution of the sciatic nerve and is caused by
compression or irritation.
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Research Concepts:
Intramuscular Injection:
Choices:
1. Pericardiophrenic vessels
2. Internal mammary
3. Coronary arteries
4. Musculophrenic arteries
Answer: 1 - Pericardiophrenic vessels
Explanations:
The phrenic nerve is mainly derived from the fourth cervical nerve with
contributions from the third and fifth.
It has sympathetic, sensory, and motor nerve fibers.
The pericardiophrenic vessels run with the phrenic nerve to the diaphragm.
The pericardiophrenic artery arises from internal thoracic artery.
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Research Concepts:
Thoracic Anatomy:
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Research Concepts:
Vecuronium:
Choices:
1. Metoprolol
2. Clonidine
3. Prazosin
4. Labetalol
Answer: 2 - Clonidine
Explanations:
Clonidine is an alpha 2 agonist which diminishes central sympathetic
outflow.
Clonidine does not decrease renal blood low and is often useful in treating
hypertension complicated by renal disease.
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Research Concepts:
Dialysis Complications:
Renal Insufficiency:
Choices:
1. 40 per minute
2. 60 per minute
3. 100 per minute
4. 120 per minutes
Answer: 3 - 100 per minute
Explanations:
MAT is characterized by an atrial rate greater than 100 per minute and the
presence of three morphologies of P waves
It is most often seen with COPD
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Research Concepts:
Multifocal Atrial Tachycardia:
Choices:
1. Prerenal
2. Renal
3. Post Renal
4. Sepsis
Answer: 1 - Prerenal
Explanations:
Hypovolemia from insensible losses, blood loss and third spacing are the
most common cause of postoperative oliguria in a patient with normal
kidneys
Sepsis in a clean case would be extremely rare
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Research Concepts:
Prerenal Kidney Failure:
Hypovolemia:
Postoperative Care:
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Question 1031: Which of the following is not a classic clinical
presentation of coronary heart disease?
Choices:
1. Non-pleuritic chest pain
2. Pain that does not change with position
3. Crushing-type chest pain
4. Tenderness of the chest wall
Answer: 4 - Tenderness of the chest wall
Explanations:
Chest wall tenderness is not seen in coronary heart disease.
Chest wall tenderness suggests costochondritis.
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Research Concepts:
Coronary Artery Disease:
Choices:
1. ACE inhibitors
2. Nitrates
3. IV digoxin
4. Diuretics
Answer: 3 - IV digoxin
Explanations:
The acute management of clinically significant disease includes cardiac
monitoring, supplemental oxygen, and the management of fluid status
Immunosuppression has not been demonstrated to be beneficial
The use of IV digoxin during the acute phase of myocarditis may be
associated with the increased occurrence of dysrhythmias
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Research Concepts:
Acute Myocarditis:
Choices:
1. Slows the heart rate
2. Empirically treat blood clots
3. Pharmacologically convert patients to sinus rhythm
4. Prevents formation of intracardiac thrombus
Answer: 4 - Prevents formation of intracardiac thrombus
Explanations:
Warfarin is an anticoagulant, which is used in the treatment of atrial
fibrillation to prevent thrombus formation and release of emboli into the
circulation.
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Research Concepts:
Atrial Fibrillation:
Choices:
1. Administer protamine rapidly via the jugular vein
2. Administer protamine as a test dose
3. Administer protamine by the surgeon
4. Give protamine with steroids
Answer: 2 - Administer protamine as a test dose
Explanations:
Protamine has a numbers of side effects, especially in diabetics.
It can cause vasodilatation, has negative inotropic effects, anaphylaxis and
pulmonary vasoconstriction.
Caution should be used when administering protamine to a diabetic. A test
dose should be given first to look for signs of allergy or sensitivity.
The dose of protamine should always be given slowly.
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Research Concepts:
Diabetes Mellitus, Type 2:
Protamine:
Choices:
1. LDH
2. WBC
3. Troponin
4. CK-MB
Answer: 3 - Troponin
Explanations:
Troponin levels increase as fast as 4 hours after infarction
It usually takes a few more hours for CK-MB to raise after infarction
LDH also rises after infarctions but it is not commonly used for diagnostic
purposes
Leukocytosis also occurs after acute myocardial infarction but it is not used
for diagnostic purposes
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Research Concepts:
Acute Myocardial Infarction:
Troponin:
Choices:
1. Increased oxygenation
2. Decreased oxygenation
3. Increased ventilation
4. Decreased ventilation
Answer: 3 - Increased ventilation
Explanations:
The most important priority is to treat the underlying cause of acute
respiratory acidosis.
Acute respiratory acidosis is best treated by increasing respiratory rate or
tidal volume.
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Research Concepts:
Ventilator Management:
Respiratory Acidosis:
Choices:
1. Furosemide
2. Spironolactone
3. Triamterene
4. Hydrochlorothiazide
Answer: 1 - Furosemide
Explanations:
Furosemide is a potent diuretic that can cause orthostatic hypotension.
Its effect may worsen when used with other antihypertensive medication.
Thiazide diuretics and spironolactone are weaker diuretics when compared
with furosemide.
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Research Concepts:
Orthostatic Hypotension:
Choices:
1. Patent LIMA
2. Incompetent aortic valve
3. Patent vein grafts
4. Aortic stenosis
Answer: 2 - Incompetent aortic valve
Explanations:
For procedures under fibrillatory arrest, a competent aortic valve is a must
The heart will distend from the ventricular fibrillation and an incompetent
aortic valve
Many surgeons will also insert a left atrial vent as an adjunct
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Research Concepts:
Mitral Valve Replacement:
Choices:
1. Disopyramide
2. Timolol
3. Sotalol
4. Verapamil
Answer: 2 - Timolol
Explanations:
Timolol is a class II antiarrhythmic drug.
It is a non-selective beta-adrenergic receptor antagonist.
It is most commonly used for glaucoma but is used orally for hypertension
and acute myocardial infarction.
Care must be taken when withdrawing the medication as it can precipitate
acute angina and MI.
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Research Concepts:
Timolol:
Antiarrhythmic Medication:
Explanations:
Aggressive lipid management can cause regression of fixed plaques
This was not thought to be the case despite decreased cardiac events with
statins
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Research Concepts:
Atherosclerosis:
Choices:
1. Adenosine
2. Procainamide
3. Diltiazem
4. Electric cardioversion
Answer: 1 - Adenosine
Explanations:
Adenosine and vagal maneuvers are the first line treatment for PSVT
Procainamide is used in medical cardioversion of ventricular tachycardia
Diltiazem is reserved for persistent cases of PSVT
Electric cardioversion is a last resort in persistent PSVT but is used initially
for unstable patients
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Research Concepts:
Paroxysmal Supraventricular Tachycardia:
Adenosine:
Choices:
1. Sodium
2. Potassium
3. Magnesium
4. Phosphorus
Answer: 2 - Potassium
Explanations:
Potassium supplementation is vital when using furosemide
Hypokalemia is manifest with muscle weakness and arrhythmias
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Research Concepts:
Furosemide:
Hypokalemia:
Choices:
1. Sulfonamides
2. Cefazolin
3. Imipenem
4. Gentamicin
Answer: 4 - Gentamicin
Explanations:
Gentamicin is an aminoglycoside requiring dose reduction with renal
impairment
Gentamicin is as a bactericidal inhibitor of protein synthesis (30S) and
active against many aerobic gram negative bacteria
Because it can readily cause renal dysfunction and ototoxicity, gentamicin
is now given once a day maintaining potency because of the post antibiotic
effect which is persistent suppression of bacterial growth within 1-2 of
administration even with immunosuppression
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Research Concepts:
Gentamicin:
Choices:
1. Insertion of a defibrillator
2. Alcohol-induced septal ablation
3. Add nitroglycerin
4. Discontinue verapamil and add furosemide and an ACE inhibitor
Answer: 4 - Discontinue verapamil and add furosemide and an ACE
inhibitor
Explanations:
A small percentage of patients with hypertrophic cardiomyopathy (HCM)
develop systolic dysfunction as well as a clinical picture consistent with
dilated cardiomyopathy.
Verapamil should be discontinued as it can reduce output. More
conventional heart failure medical optimization should be implemented.
Cardioversion is appropriate for managing atrial fibrillation as a
complication of HCM.
Septal ablation is considered in cases of severe, symptomatic obstructive
HCM.
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Research Concepts:
Cardiomyopathy, Hypertrophic:
Choices:
1. Epithelial cells
2. Inflammatory cells
3. Fibroblasts
4. Transitional cells
Answer: 4 - Transitional cells
Explanations:
Wound healing depends on the recruitment of inflammatory cells and their
mediators into the wound bed.
The cells, in turn, through the actions of various cytokines, encourage the
activity of epithelial cells and fibroblasts.
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Research Concepts:
Wound Healing:
Choices:
1. Overdose
2. Expensive cost
3. Malfunction
4. Patients may be physically or mentally unable to use this method
Answer: 1 - Overdose
Explanations:
The regimen and amount of drug is preadjusted my ordering physician.
There is a lock out that is to prevent overdose.
The machine is expensive and can malfunction.
Patients must be aware and able to activate the device.
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Research Concepts:
Patient Controlled Anesthesia (PCA):
Choices:
1. Cardiac index greater than 3L/min/m2
2. Pulmonary capillary wedge pressure less than 15 mmHg
3. Central venous pressure of 10 mmHg
4. Pulmonary capillary wedge pressure greater than 18 mmHg
Answer: 4 - Pulmonary capillary wedge pressure greater than 18 mmHg
Explanations:
Left sided heart failure is shown by an increase in preload.
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Research Concepts:
Congestive Heart Failure And Pulmonary Edema:
Choices:
1. Large vessel vasculitis
2. Vasculitis of small and medium-sized vessels
3. Non-caseating granulomas
4. Endarteritis obliterans
Answer: 1 - Large vessel vasculitis
Explanations:
Takayasu arteritis is most common in Asian and Indian populations
It is characterized by large vessel vasculitis
Aortic lesions may lead to aneurysm and its sequelae
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Research Concepts:
Arteritis, Takayasu:
Choices:
1. Niacin
2. Fish oil
3. Increase intake of processed foods
4. Weight loss and exercise
Answer: 3 - Increase intake of processed foods
Explanations:
Processed foods typically contain high levels of saturated fats and salt.
Niacin, fish oil, weight loss, and exercise are all appropriate treatments for
patients with high cholesterol.
Niacin is effective at reducing LDL, while fish oil, weight loss, and exercise
are effective at increasing HDL.
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Research Concepts:
Hypercholesterolemia:
Choices:
1. Blood flow is maximum during diastole
2. It is maximum during systole
3. Blood flow distal to a thrombus increases
4. Blood flow proximal to a thrombus decreases
Answer: 1 - Blood flow is maximum during diastole
Explanations:
Coronary circulation is the circulation of blood in the blood vessels of the
heart muscle.
Blood flow in these arteries is maximal during diastole.
Blood flow distal to a thrombus decreases.
Blood flow proximal to the thrombus it increases.
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Research Concepts:
Cardiac Physiology:
Choices:
1. Digoxin
2. Quinidine
3. Amrinone
4. Dobutamine
Answer: 3 - Amrinone
Explanations:
Amrinone and milrinone are inotropic agents which act by inhibiting
phosphodiesterase.
Both amrinone and milrinone increase the levels of cyclic AMP.
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Research Concepts:
Inotropes And Vasopressors:
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Research Concepts:
Right Heart Failure:
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Research Concepts:
Fetal Circulation:
Explanations:
Pulmonary hypertension is seen more in females than males
Associated with connective tissue disease or autoimmune disease, cocaine
abuse, HIV, and thyroid disease
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Research Concepts:
Pulmonary Hypertension:
Choices:
1. Pneumothorax
2. Pulmonary edema
3. Wheezing
4. Flail chest
Answer: 2 - Pulmonary edema
Explanations:
A decrease in static compliance is generally associated with a
pneumothorax.
In the ICU, pulmonary edema is by far more common than pneumothorax.
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Research Concepts:
Pulmonary Edema:
Choices:
1. Sulfonamide
2. Cephalexin
3. Erythromycin
4. Gentamycin
Answer: 3 - Erythromycin
Explanations:
Macrolide antibiotics are good substitutes for patients allergic to penicillin
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Research Concepts:
Gram Positive Bacteria:
Erythromycin:
Choices:
1. Anterior portion of the left atrium
2. Posterior portion of the left ventricle
3. Anterior portion of the left ventricle
4. Posterior portion of the right atrium
Answer: 2 - Posterior portion of the left ventricle
Explanations:
The circumflex artery is a branch of the left main coronary artery.
It travels in the left atrioventricular groove.
It supplies posterolateral left ventricle and anterolateral papillary muscle.
It ends at the point where it joins to form the posterior interventricular
artery in the 10% of cases where the posterior interventricular artery does
not arise from the right coronary artery.
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Research Concepts:
Heart Anatomy:
Choices:
1. Dipyridamole echocardiography
2. CT helical
3. Stress test
4. Thallium scintigraphy
Answer: 1 - Dipyridamole echocardiography
Explanations:
Dipyridamole echocardiography has a high specificity, near to 93%
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Research Concepts:
Coronary Artery Disease:
Choices:
1. Minoxidil
2. Clonidine
3. Hydralazine
4. Alpha methyldopa
Answer: 1 - Minoxidil
Explanations:
Minoxidil is reserved for severe hypertension.
Minoxidil is a prodrug and a potassium channel opener that hyperpolarizes
and relaxes smooth muscle.
Minoxidil can cause hirsutism.
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Research Concepts:
Antihypertensive Medications:
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Research Concepts:
Embryology:
Choices:
1. Age greater than 65
2. Diabetes mellitus
3. Current aspirin therapy
4. Recent cerebral hemorrhage
Answer: 4 - Recent cerebral hemorrhage
Explanations:
A history of cerebral hemorrhage is a contraindication to administration of
thrombolytics because the risk of hemorrhage may be further increased.
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Research Concepts:
Tissue Plasminogen Activator:
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Research Concepts:
Cardiogenic Shock:
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Research Concepts:
Hypertension:
Complications:
Choices:
1. Clarithromycin
2. Azithromycin
3. Rifampin
4. Erythromycin
Answer: 2 - Azithromycin
Explanations:
Azithromycin is not metabolized by the P-450 system.
Therefore is usually does not have adverse drug-drug interactions caused by
an effect on the cytochrome P-450 system.
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Research Concepts:
Cytochrome P450:
Antibiotics:
Choices:
1. High TSH
2. Low TSH
3. Normal TSH
4. Low T4
Answer: 2 - Low TSH
Explanations:
Thyrotoxicosis is associated with high thyroid hormone
And low TSH level
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Research Concepts:
Thyrotoxicosis:
Choices:
1. An elder
2. A member of an ethics board
3. A health-care proxy
4. Power of Attorney
Answer: 3 - A health-care proxy
Explanations:
A designated health-care proxy is a person authorized to make health care
decisions for another person in the event they are unable to make their own
due to health or emergent circumstances
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Research Concepts:
Proxy:
Choices:
1. Additive
2. Agonist
3. Antagonist
4. Synergistic
Answer: 4 - Synergistic
Explanations:
NSAIDS and opioid have synergistic effect on each other
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Research Concepts:
Nonsteroidal Anti-inflammatory Drugs (NSAIDs):
Opioids:
Pain Management:
Choices:
1. Delivery of cardioplegia
2. Potassium induced cardiac arrest
3. Hypothermia
4. Use of transesophageal echocardiography
Answer: 3 - Hypothermia
Explanations:
Hypothermia is the core foundation of open heart surgery.
It decreases metabolism and oxygen requirements, allows cell viability at
lower temperatures and has a protective effect on cells.
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Research Concepts:
Hypothermia, Circulatory Arrest And Cardiopulmonary
Bypass:
Choices:
1. Mitral valve
2. Ascending aorta
3. Abdominal aorta
4. Patent ductus arteriosus
Answer: 2 - Ascending aorta
Explanations:
Tertiary syphilis occurs in 33% of people who are untreated and the
manifestation may take decades. Lesions are generally due to the cardiac or
nervous systems.
The cardiac manifestations include dilatation of the ascending aorta, aortic
valve insufficiency, and narrowing of the coronary ostia.
Symptoms of the aortic aneurysm may include pressure on the trachea,
vocal cord paralysis, and painful erosion into the sternum or spine.
The neural manifestations can vary from paresis to dementia. Tabes dorsalis
is a slow progressive degeneration of the posterior columns and nerve roots.
Patients often complain of sharp stabbing pains in the back of the legs.
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Research Concepts:
Syphilis:
Choices:
1. Epinephrine
2. Dobutamine
3. Nitroglycerin
4. Metoprolol
Answer: 2 - Dobutamine
Explanations:
An increase in heart rate without affecting afterload will reduce aortic
regurgitation.
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Research Concepts:
Aortic Regurgitation:
Choices:
1. Raising levels of bradykinin
2. Increasing levels of nitric oxide
3. Blocking aldosterone receptors
4. Increasing production of cyclic AMP
Answer: 1 - Raising levels of bradykinin
Explanations:
ACE inhibitors raise levels of bradykinin, a vasodilator that consequently
causes a drop in blood pressure.
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Research Concepts:
Angiotensin Converting Enzyme Inhibitors (ACEI):
Choices:
1. KRas
2. P52
3. Fibrillin
4. BCl
Answer: 3 - Fibrillin
Explanations:
Fibrillin is a glycoprotein that is required for synthesis of elastin fibers
Mutations in fibrillin 1 gene cause Marfan syndrome
Mutations of fibrillin 2 gene are linked to Beal's syndrome
Fibrillin appear to lay a vital role in the structure of blood vessels
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Research Concepts:
Marfan Syndrome:
Choices:
1. Aortic coarctation
2. Aortic stenosis
3. Aortic dissection
4. Aortic regurgitation
Answer: 1 - Aortic coarctation
Explanations:
Coarctation of the aorta can cause a difference in pressure readings of the
upper extremities.
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Research Concepts:
Aortic Coarctation:
Choices:
1. >14 days after onset of AF
2. >21 days after onset of AF
3. <7 days after onset of AF
4. >7 days after onset of AF
Answer: 3 - <7 days after onset of AF
Explanations:
During AF, the atria contract chaotically and irregularly when compared to
the ventricles
Cardioversion is most successful if attempted <7 days after onset of AF
It should be done emergently for those with symptomatic (hypotension,
heart failure or angina) AF
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Research Concepts:
Atrial Fibrillation:
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Research Concepts:
Venous Air Embolism:
Choices:
1. Old age
2. Infancy
3. Exercise
4. Pregnancy
Answer: 1 - Old age
Explanations:
Lack of exercise and sedentary life style will lead to cardiac atrophy.
Old age is a risk factor for muscle atrophy.
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Research Concepts:
Cardiac Atrophy:
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Research Concepts:
Tricuspid Stenosis:
Choices:
1. Make sure how much the patient wants to hear about the illness
2. Call friends and family to provide social support
3. Inquire the education level of the patient
4. Inquire if the patient wants hospice care to be arranged
Answer: 1 - Make sure how much the patient wants to hear about the illness
Explanations:
Readiness to hear a terminal diagnosis should be assessed before disclosure.
Some patients may choose not to hear about a terminal diagnosis.
Family and friends are not notified without the patient's permission.
Discussion about end of life care comes later.
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Research Concepts:
Terminal Illness:
Choices:
1. Urokinase
2. Aminocaproic acid
3. Fresh frozen plasma
4. Vitamin K
Answer: 2 - Aminocaproic acid
Explanations:
Antiplasmin agents are useful in open-heart surgery where excessive
plasmin is generated.
Drugs such as aminocaproic acid or tranexamic acid are useful in open
heart surgery.
These drugs inhibit the fibrinolysis by inhibiting plasminogen activation.
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Research Concepts:
Thrombolysis:
Choices:
1. Pooled platelets
2. Single donor
3. Radiated platelets
4. Washed platelets
Answer: 2 - Single donor
Explanations:
Single donor platelet transfusions can help minimize the risk of
desensitization when there are HLA incompatibility issues.
However, apheresed platelets are more expensive than pooled platelet
concentrate.
Prophylactic transfusions should be done when the platelet counts are less
than 10,000/ml.
For routine use 5-6 units of platelets is adequate for most patients and can
increase platelet count by 30,000.
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Research Concepts:
Platelet Transfusion:
Choices:
1. Ipsilateral mastectomy
2. Patients with pacemakers
3. Patients with pancoast tumor
4. Patients with carpal tunnel syndrome
Answer: 1 - Ipsilateral mastectomy
Explanations:
Cephalic vein cut down offers quick access to ensure chemotherapy
delivery.
Most physicians do not recommend cephalic vein cut down in patients with
ipsilateral mastectomy.
Other contraindications to cephalic vein cut down include chronic
venostasis, lymphedema, and excess scarring.
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Research Concepts:
Cephalic Vein Cut Down:
Choices:
1. Heparin
2. Protamine
3. Vitamin K
4. Aspirin
Answer: 3 - Vitamin K
Explanations:
Vitamin K administration can decrease bleeding problems due to oral anti-
coagulants such as warfarin.
The response to vitamin K is slow and requires about 24 hours.
If immediate homeostasis is required, fresh frozen plasma should be
infused.
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Research Concepts:
Anticoagulation:
Choices:
1. C5, 6
2. C8, T1
3. T11-12
4. C3,4,5
Answer: 2 - C8, T1
Explanations:
Sometimes during anesthesia, the ulnar nerve is compressed at the elbow
known as the cubital tunnel syndrome. The syndrome present with
numbness in the small and ring fingers
Over time, the numbness becomes long standing and there is weakness in
the hand. The little and ring fingers curl up and appear like a claw
The claw hand caused by compression of the ulnar nerve at the wrist is
worse (Guyon canal compression)
The cubital tunnel syndrome occurs because the ulnar nerve passing along
the edge of the outer elbow is not protected. Supportive measures can help
prevent the numbness or tingling
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Research Concepts:
Cubital Tunnel Syndrome:
Claw Hand:
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Research Concepts:
Congenital Heart Disease:
Choices:
1. Red cell casts in urine
2. Flea bitten kidney
3. Polyuria
4. Right ventricular hypertrophy
Answer: 2 - Flea bitten kidney
Explanations:
Individuals with high blood pressure often develop severe left ventricular
hypertrophy.
Uncontrolled high blood pressure can result in a heart attack, stroke, renal
failure, retinopathy, and early death.
The kidneys usually appear flea bitten with petechial hemorrhage and
arteriosclerosis.
Malignant hypertension is most common in young black males who are
non- compliant with their medications.
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Research Concepts:
Hypertension, Malignant:
Choices:
1. Prior trauma
2. Lupus
3. Histoplasmosis
4. Myxoma
Answer: 4 - Myxoma
Explanations:
Calcification of the pericardium can occur after an episode of pericarditis or
trauma
Infectious agents known to cause calcified pericardium include coxsackle,
TB, influenza and histoplasmosis.
With lupus, rheumatic heart disease, uremia, and post open-heart surgery
one can also develop pericardial calcification.
Rarely, teratomas, or pericardial cysts may become calcified.
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Research Concepts:
Pericardial Calcification:
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Research Concepts:
Vascular Anatomy:
Choices:
1. Hypertension
2. Hypoxemia
3. Tachycardia
4. Respiratory acidosis
Answer: 1 - Hypertension
Explanations:
Tension pneumothorax causes a decreased cardiac output, resulting in
hypotension and a compensatory tachycardia.
Respiratory impairment also occurs, causing hypoxemia, hypercarbia, and
respiratory acidosis.
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Research Concepts:
Tension Pneumothorax:
Choices:
1. Lidocaine
2. Magnesium sulfate
3. Bretylium
4. Adenosine
Answer: 2 - Magnesium sulfate
Explanations:
Magnesium sulfate is the drug of choice for treatment of torsade de pointes
Torsade de pointes is an unusual and distinctive form of polymorphic
ventricular tachycardia
It can degenerate into ventricular fibrillation
Lidocaine usually has no effect on torsade
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Research Concepts:
Torsade de Pointes:
Choices:
1. Warfarin
2. Repeat echo in 12 months
3. Surgery consult
4. Daily aspirin
Answer: 3 - Surgery consult
Explanations:
Patients with severe, gradual onset mitral valve regurgitation with ejection
fraction <50% should undergo a more definitive transesophageal
echocardiogram in preparation for possible valve replacement surgery.
Endocarditis prophylaxis is advisable, but surgical consult should not be
delayed.
As there is no indication of atrial fibrillation, there is no need for
anticoagulation.
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Research Concepts:
Mitral Regurgitation:
Choices:
1. Furosemide
2. Hydralazine
3. Procainamide
4. Quinidine
Answer: 1 - Furosemide
Explanations:
Drug-induced lupus is rare and reversible with withdrawal of the offending
drug.
Implicated medications include hydralazine, procainamide, quinidine, and
phenytoin.
The symptoms of lupus generally start 3 to 6 months after initiation of the
drug and resolve within a few weeks or months after discontinuation.
As these medications are more commonly used in males, drug induced
lupus is more common in males.
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Research Concepts:
Lupus Erythematosus, Drug-Induced:
Choices:
1. Flumazenil
2. Phenobarbital
3. Naltrexone
4. Naloxone
Answer: 4 - Naloxone
Explanations:
Naloxone can reverse the effects of morphine and other narcotics
Flumazenil reverses the effects of benzodiazepines
Phenobarbital can worsen respiratory depression
Naltrexone is used for alcohol addiction
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Research Concepts:
Opioid Toxicity:
Choices:
1. Hyperkalemia
2. Hyponatremia
3. Hypercalcemia
4. Hypermagnesemia
Answer: 3 - Hypercalcemia
Explanations:
Digoxin toxicity is worsened by hypokalemia, hypomagnesemia, and
hypercalcemia.
Digoxin toxicity is also worsened by quinidine.
Digoxin toxicity can be treated by anti-digoxin antibodies.
Digoxin is not removed by hemodialysis or peritoneal dialysis.
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Research Concepts:
Hypercalcemia:
Digoxin:
Choices:
1. Above10
2. Above 30
3. Above 40
4. Above 50
Answer: 4 - Above 50
Explanations:
The American Heart Association recommends above 50 for HDL and less
than 150 for triglycerides for high risk patients
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Research Concepts:
Hyperlipidemia:
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Research Concepts:
Cardiac Physiology:
Choices:
1. Pindolol
2. Propranolol
3. Labetalol
4. Acebutolol
Answer: 3 - Labetalol
Explanations:
Labetalol has both alpha and beta blocking ability. It has a short half-life.
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Research Concepts:
Labetalol:
Choices:
1. Deficiency of oxygen reaching the heart muscle
2. Poor peripheral circulation
3. Increased left ventricular filling pressures
4. Increased need of oxygen for salvage of necrotic myocardium
Answer: 1 - Deficiency of oxygen reaching the heart muscle
Explanations:
Diminished oxygenation or lack of oxygen to the cardiac muscle results in
ischemic pain or angina.
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Research Concepts:
Myocardial Infarction, Acute:
Choices:
1. Low alkaline phosphatase
2. High bilirubin
3. Fever
4. Rash
Answer: 1 - Low alkaline phosphatase
Explanations:
Graft versus host disease is mediated by T cells attacking the host cells.
Characterized by fever, rash, high alkaline phosphatase, and elevated
bilirubin.
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Research Concepts:
Graft Versus Host Disease:
Choices:
1. Suprapubic cystotomy
2. Foley catheter
3. Fluids
4. Urology consult
Answer: 2 - Foley catheter
Explanations:
Obstructive uropathy has many causes and may occur after surgery in an
elderly individual with benign prostatic hyperplasia.
Pain is common when the bladder is acutely distended. Most patients will
complain of suprapubic tenderness and will be in distress.
The history may suggest symptoms of benign prostatic hyperplasia.
Because the disorder is very distressing, treatment should be rapid.
Treatment consists of inserting a Foley catheter. If this is not possible, a
urology consult for a suprapubic catheter may be required.
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Research Concepts:
Post-op Urinary Retention:
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Research Concepts:
Contrast Medium Reactions:
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Research Concepts:
Xenograft:
Choices:
1. Subclavian
2. Lung apex
3. Thoracic duct
4. Heart
Answer: 3 - Thoracic duct
Explanations:
The thoracic duct is located on the left side
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Research Concepts:
Central Line Placement:
Choices:
1. Labetalol
2. Sotalol
3. Propranolol
4. Atenolol
Answer: 1 - Labetalol
Explanations:
Labetalol is a short acting reversible beta-blocker with alpha blocking
activities.
Labetalol is very useful in the ICU for immediate control of blood pressure.
Labetalol is often used in treatment of malignant hypertension.
Relative contraindications for labetalol include asthma, congestive heart
failure, heart block, bradycardia, hypotension, and cardiogenic shock.
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Research Concepts:
Labetalol:
Choices:
1. Right heart failure
2. Left ventricular systolic dysfunction
3. Pulmonary hypertension
4. Hemoptysis
Answer: 2 - Left ventricular systolic dysfunction
Explanations:
Cor triatriatum sinistrum is a condition where there are 3 atria, with the left
atria divided by an accessory membrane
This can lead to pulmonary hypertension, pulmonary edema, hemoptysis,
and right sided heart failure
Left ventricular function is usually not affected
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Research Concepts:
Cor Triatriatum:
Choices:
1. Exercise
2. Sympathetic
3. Parasympathetic
4. Epinephrine
Answer: 3 - Parasympathetic
Explanations:
Parasympathetic stimulation decreases heart rate
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Research Concepts:
Myocardial Oxygen Demand:
Choices:
1. Temperature 103.2 F
2. Respiratory rate 26
3. Heart rate 130 bpm
4. Blood pressure 122/80 mmHg
Answer: 4 - Blood pressure 122/80 mmHg
Explanations:
Patients developing septic shock will have increased temperature, chills,
tachypnea, tachycardia and hypotension
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Research Concepts:
Shock, Septic:
Choices:
1. It is a non-depolarizing skeletal muscle paralytic agent
2. It has more cardiovascular effects than pancuronium and atracurium
3. It causes less histamine release than pancuronium and atracurium
4. Excretion is 30% unchanged in urine and 45% unchanged in the bile
Answer: 2 - It has more cardiovascular effects than pancuronium and
atracurium
Explanations:
Vecuronium has less cardiovascular effects than pancuronium and
atracurium
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Research Concepts:
Vecuronium:
Paralytics, Non-depolarizing:
Choices:
1. No clinical benefit
2. Significant clinical benefit
3. Excess mortality
4. None of the above
Answer: 1 - No clinical benefit
Explanations:
The Occluded Artery Trial (OAT) concluded no clinical benefit with PCI 3
to 28 days after acute MI with respect to death, reinfarction or heart failure
The trial had high rates of PCI procedural success and sustained patency
The trial had an average follow-up of 3 years. A trend toward excess
nonfatal reinfarction was seen during follow-up
N Engl J Med 2006; 355:2395-2407 December 7, 2006
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Research Concepts:
Percutaneous Coronary Intervention:
Myocardial Infarction:
Choices:
1. Dialysis
2. Start IV enalapril
3. Tracheostomy
4. Mitral valve replacement
Answer: 2 - Start IV enalapril
Explanations:
The patient has persistent pulmonary edema so the goal should be to
decrease afterload in order to increase the cardiac output and reduce the
retrograde flow across the incompetent mitral valve.
This is accomplished using ACE inhibitors, nitrates, and hydralazine.
Mitral valve replacement surgery would correct the problem but the patient
needs to be stabilized first.
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Research Concepts:
Mitral Regurgitation:
Choices:
1. Difficult access
2. Poorly marked borders
3. Risk of contamination
4. Risk of thrombosis
Answer: 3 - Risk of contamination
Explanations:
The major disadvantage of the femoral site for venous cannulation is
contamination.
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Research Concepts:
Central Venous Access, Femoral Vein:
Choices:
1. Heparin GTT and Plavix 75 mg qd
2. Aspirin 325 mg PO qd with Coumadin titrated to INR of >3.0
3. Plavix 75 mg qd PO with Coumadin titrated to INR of >2.0
4. Enoxaparin at 1 mg/kg SC with warfarin titrated to INR of 2.0 to 2.5
Answer: 4 - Enoxaparin at 1 mg/kg SC with warfarin titrated to INR of 2.0
to 2.5
Explanations:
The patient needs to become therapeutic with a heparin drip or enoxaparin.
They are started on warfarin with an INR of 2.0 to 2.5 for 3-6 months.
The treatments must overlap for several days.
DVT prophylaxis is unfractionated heparin 5000 U SQ BID or TID, or
enoxaparin 30 to 40 mg Qday or BID
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Research Concepts:
Deep Vein Thrombosis:
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Research Concepts:
Secondary Hypertension:
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Research Concepts:
Pulmonary Embolism:
Choices:
1. Elderly black men
2. Elderly white women
3. Elderly black women
4. Elderly white men
Answer: 4 - Elderly white men
Explanations:
AAAs predominantly affect elderly white men
Smoking is the risk factor most strongly associated with AAAs
An aneurysm is a focal dilatation in an artery with at least a 50% increase in
normal diameter
Ultrasound is the standard imaging tool for AAAs
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Research Concepts:
Abdominal Aortic Aneurysm:
Choices:
1. Acebutolol
2. Hydralazine
3. Methyldopa
4. Diltiazem
Answer: 4 - Diltiazem
Explanations:
Diltiazem is a calcium channel blocker used to treat atrial arrhythmias,
angina and hypertension
It is a useful drug but can cause constipation and headaches
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Research Concepts:
Diltiazem:
Choices:
1. 1%
2. 25%
3. 50%
4. 70%
Answer: 2 - 25%
Explanations:
Patent foramen ovale is present in 10%-15% of the population when
demonstrated by contrast transthoracic echocardiography
There is a 25% prevalence of probe-patent foramen ovale seen in autopsy
studies
This difference in observed patency of the foramen ovale at autopsy and
during echocardiogram is most likely due to direct visualization of the
patent foramen ovale at autopsy. One may miss a small opening on contrast
echocardiography,
In most people, probe patent foramen ovale is of no consequence
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Research Concepts:
Patent Foramen Ovale:
Choices:
1. One half life
2. Two half lives
3. Three half lives
4. Four half lives
Answer: 4 - Four half lives
Explanations:
It takes an approximate of 4-5 half lives to reach steady states
Maintenance doses can be scheduled depending on the half life of a drug
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Research Concepts:
Steady State Concentration:
Choices:
1. Hyponatremia
2. Hypercalcemia
3. Hypomagnesemia
4. Hyperkalemia
Answer: 3 - Hypomagnesemia
Explanations:
Magnesium, like potassium, is an intracellular ion and plays a vital role in
many biochemical and metabolic reactions.
Magnesium depletion and potassium depletion usually have similar side-
effects and toxicity.
In some cases, the toxicity of digoxin due to hypokalemia cannot be
reversed until hypomagnesemia is corrected.
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Research Concepts:
Digoxin:
Choices:
1. High impulse CPR at 80 compressions per min
2. High impulse CPR at 60 compressions per min
3. High impulse CPR at 100-120 compressions per min
4. High impulse CPR at 150 compressions per min
Answer: 3 - High impulse CPR at 100-120 compressions per min
Explanations:
Ultimate method to improve blood flow is by manual compression of the
heart via thoracotomy.
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Research Concepts:
Cardiopulmonary Resuscitation:
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Research Concepts:
Sodium Nitroprusside:
Choices:
1. Glucose-6-phosphate dehydrogenase
2. Plasma cholinesterase
3. Dopamine b hydroxylase
4. Cytochrome P450 oxidase
Answer: 2 - Plasma cholinesterase
Explanations:
Plasma cholinesterase activity may be diminished in pregnancy, anemia,
myxedema, severe liver or kidney disease, infections, malignant tumors,
burns, decompensated heart disease, or peptic ulcers.
Some patients have genetic abnormalities of plasma cholinesterase.
Medications that reduce plasma cholinesterase activity include
corticosteroids, some MAO inhibitors, and oral contraceptives.
Organophosphate insecticides are irreversible inhibitors of plasma
cholinesterase.
The effects of succinylcholine are prolonged when there is abnormality in
plasma cholinesterase activity.
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Research Concepts:
Succinylcholine:
Choices:
1. Nifedipine
2. Aspirin
3. Digoxin
4. Metoprolol
Answer: 4 - Metoprolol
Explanations:
Beta blockers have been shown to reduce sudden cardiac death
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Research Concepts:
Coronary Artery Disease:
Beta-Blockers:
Choices:
1. Rheumatic heart disease
2. Age related calcification
3. Bicuspid aortic valve
4. Congenital heart disease
Answer: 3 - Bicuspid aortic valve
Explanations:
Age related calcific stenosis of the aortic valve usually presents in the 70s
or 80s
Congenital heart disease would have be noted earlier
AS secondary to rheumatic heart disease presents in the 60s or 70s
Bicuspid aortic valve is more common in males, occurs in 1 to 2% of
individuals, and most often presents in 40s or 50s
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Research Concepts:
Aortic Stenosis:
Choices:
1. Streptococcus pneumonia
2. Streptococcus viridans
3. Streptococcus pyogenes
4. Streptococcus agalactiae
Answer: 2 - Streptococcus viridans
Explanations:
Streptococcus pneumonia often causes otitis media, sinusitis, and
pneumonia
Streptococcus agalactiae, part of the normal vaginal flora, can cause
neonatal meningitis and sepsis
Streptococcus pyogenes often causes pharyngitis that may be complicated
by nephritis or rheumatic fever
Streptococcus viridans is the most common cause of infective endocarditis
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Research Concepts:
Endocarditis:
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Research Concepts:
Rheumatic Fever, Acute:
Choices:
1. Liver
2. Kidney
3. Gastrointestinal mucosa
4. Serum
Answer: 1 - Liver
Explanations:
All amide anesthetics are metabolized in the liver.
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Research Concepts:
Local Anesthetics:
Choices:
1. Spironolactone
2. Triamterene
3. Acetazolamide
4. Hydrochlorothiazide
Answer: 4 - Hydrochlorothiazide
Explanations:
Thiazide diuretics are used to treat patients with hypertension and heart
failure.
Thiazides act by blocking Na+/Cl- transporters in the distal convoluted
tubule.
Prolonged use of hydrochlorothiazide can cause elevations in serum
glucose, lipids, and uric acid.
Hydrochlorothiazide can cause profound hypokalemia.
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Research Concepts:
Diuretics:
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Research Concepts:
Atherosclerosis:
Choices:
1. IABP (intra-aortic balloon pump)
2. Vasodilators, inotropes, diuretics
3. AVR (aortic valve replacement)
4. Medical management as a bridge to surgery
Answer: 1 - IABP (intra-aortic balloon pump)
Explanations:
IABP is contraindicated, as the pressure would increase the aortic
regurgitation
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Research Concepts:
Aortic Regurgitation:
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Research Concepts:
Toxicity, Lidocaine:
Choices:
1. Inferior wall myocardial infarction only
2. GERD
3. Inferior wall myocardial infarction (IWMI) with additional right ventricular
infarction (RVI)
4. Congestive heart failure
Answer: 3 - Inferior wall myocardial infarction (IWMI) with additional right
ventricular infarction (RVI)
Explanations:
Elevated JVP with clear lungs in setting of IWMI is pathognomic of
additional RVI
Isolated RVI is a very rare occurrence
CHF usually presents with elevated JVP and rales
GERD is not a diagnostic consideration in this clinical scenario
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Research Concepts:
Inferior Wall Myocardial Infarction:
Choices:
1. Muscle weakness
2. Palpitations
3. Paresthesias
4. Diarrhea
Answer: 4 - Diarrhea
Explanations:
Hypokalemia (low serum potassium) tends to cause constipation, not
diarrhea
Conversely, diarrhea can cause hypokalemia although it is very common
with protracted emesis
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Research Concepts:
Hypokalemia:
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Research Concepts:
Metabolic Syndrome:
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Research Concepts:
Cyanosis:
Choices:
1. Thyroid hormone
2. Milrinone
3. Calcium
4. Insulin
Answer: 4 - Insulin
Explanations:
Insulin has no inotropic activity.
Common inotropes used in the ICU include bipyridine derivative-like
milrinone, calcium, digoxin, and catecholamines.
Sometimes glucagon and thyroid hormone are also be used to stimulate the
heart's pumping activity.
Negative inotropes include beta-blockers, calcium channel blockers, and
class 1 anti-arrhythmic agents.
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Research Concepts:
Heart Failure:
Choices:
1. Prothrombin time
2. Partial thromboplastin time
3. Peripheral smear
4. Functional closure time
Answer: 4 - Functional closure time
Explanations:
The platelet function time is a new method of assessing platelet function
This vital test measures time required for a platelet plug to occlude an
aperture in a membrane containing some collagen
The bleeding rime is no longer used today and is not satisfactory for use in
children
Platelet aggregation has been used to evaluate neonatal platelet function but
there is a lot of difficulty in obtaining adequate blood from neonates
without it first clotting
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Research Concepts:
Functional Closure Time:
Choices:
1. Nifedipine
2. Hydralazine
3. Alpha methyldopa
4. Minoxidil
Answer: 2 - Hydralazine
Explanations:
Procainamide, hydralazine, and isoniazid can all cause lupus like syndrome.
Incidence of lupus features are common in slow acetylators.
The lupus symptoms disappear once the drug is stopped.
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Research Concepts:
Lupus Erythematosus, Drug-Induced:
Antihypertensive Medications:
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Research Concepts:
Respiratory Therapy:
Respiratory Support:
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Research Concepts:
Carotid Artery:
Carotid, Baroreceptors:
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Research Concepts:
Hypokalemia:
Choices:
1. Maintain blood pressure above 80 mmHg
2. Use of inotropes
3. Use of calcium channel blockers
4. Use of aprotinin
Answer: 3 - Use of calcium channel blockers
Explanations:
When ever one uses the radial artery as a conduit, it is important to use a
vasodilator.
Almost all surgeons use some form of vasodilator, and the calcium channel
blockers are preferred.
The radial artery has a high incidence of spasm and thus it should be
vasodilator at all times.
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Research Concepts:
Radial Artery Coronary Bypass:
Choices:
1. Observation
2. ECG every 6 months
3. Echocardiogram every year
4. Surgery
Answer: 1 - Observation
Explanations:
Asymptomatic patient with mild mitral stenosis requires no intervention.
Requires echo yearly.
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Research Concepts:
Mitral Stenosis:
Choices:
1. Recent hemorrhagic brain injury
2. Recent head trauma
3. Recent acute pulmonary embolism
4. Presence of aortic dissection
Answer: 3 - Recent acute pulmonary embolism
Explanations:
Absolute contraindications for thrombolytics include any type of head
injury, intracranial bleeding, or a recent hemorrhagic stroke.
Uncontrolled high blood pressure is also a contraindication for the use of
thrombolytics.
Individuals who have been diagnosed with an aortic dissection should not
be treated with thrombolytics.
When pulmonary embolism is associated with low cardiac output,
hypotension, and shock, it can be treated with thrombolytic therapy.
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Research Concepts:
Thrombolysis:
Choices:
1. Apnea
2. Inspiration
3. Expiration
4. Stridor
Answer: 2 - Inspiration
Explanations:
Pulsus paradoxus describes a decrease of systolic pressure during
inspiration.
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Research Concepts:
Pulsus Paradoxus:
Choices:
1. Daily
2. Weekly
3. Biweekly
4. Monthly
Answer: 4 - Monthly
Explanations:
Close monitoring is needed during the first 4 weeks of warfarin initiation
Once patients are stabilized monthly INR check up would suffice
Patients can be taught to check their own INRs using portable digital
machines
As long as the INR is in therapeutic range, there is no need to adjust the
medication
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Research Concepts:
Warfarin:
Choices:
1. Tetralogy of Fallot
2. Transposition of great vessels
3. Total anomalous pulmonary venous return
4. Type IV truncus arteriosus
Answer: 4 - Type IV truncus arteriosus
Explanations:
In truncus, part or the entire pulmonary artery comes of the aorta.
The shunt in truncus is left to right and most infants develop congestive
heart failure.
The disorder, which presents with cyanosis at birth, is transposition of the
great vessels.
Congenital heart disorders that present with cyanosis typically have a right
to left shunt.
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Research Concepts:
Truncus Arteriosus:
Choices:
1. Although none had congestive heart failure, all had a history of coronary
artery disease
2. Compared to placebo group, there was a 20% relative risk reduction of
myocardial infarctions in the treatment group
3. There was a 32% relative risk reduction of strokes in the treatment group
4. Ramipril reduced the risk of CHF by 23%
Answer: 1 - Although none had congestive heart failure, all had a history of
coronary artery disease
Explanations:
The HOPE study was a large, double-blind, placebo-controlled trial that
determined the risk of cardiovascular events in over 9500 patients studied
in 267 centers in 19 countries.
Subjects could not have CHF, but were at high risk of vascular death or
morbidity by virtue of age (required to be older than 55 years), or because
they had either diabetes or a prior vascular event or existing vascular
disease.
The study was stopped about one year early, after 4.5 years, since the
available data supported a more favorable outcome for patients treated with
ramipril.
"Effects of an angiotensin-converting-enzyme inhibitor, ramipril, on
cardiovascular events in high-risk patients. The Heart Outcomes Prevention
Evaluation Study Investigators." The New England Journal of Medicine
[2000, 342(3):145-153]
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Research Concepts:
Angiotensin Converting Enzyme Inhibitors (ACEI):
Choices:
1. Poor weight gain
2. Congestive heart failure
3. Chronic upper respiratory tract infections
4. Constipation
Answer: 4 - Constipation
Explanations:
Atrioventricular canal defect symptoms can include poor weight gain,
chronic upper respiratory infections, feeding difficulties, excessive
sweating, difficulty with crying, and nasal flaring
Later patients may have congestive heart failure with easy fatigability,
edema, and dyspnea
Constipation is not seen
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Research Concepts:
Atrioventricular Canal Defects:
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Research Concepts:
Hypovolemic Shock:
Choices:
1. Bilateral basilar crackles
2. Pale palms
3. Low hematocrit
4. Wide pulse pressure
Answer: 4 - Wide pulse pressure
Explanations:
Pulse pressure-difference between systolic and diastolic blood pressure
The hyperdynamic circulation makes the pulse pressure wider in anemia
Hematocrit could be falsely elevated in dehydrated patients
Pale palms are seen in severe anemia
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Research Concepts:
Anemia:
Choices:
1. Mini-dose heparin
2. Graded stockings
3. Dextran
4. ASA
Answer: 4 - ASA
Explanations:
Mechanical compression using compression stockings is widely used but
the latest evidence indicates that they must be combined with a
pharmacological method to prevent DVT.
Aspirin is not recommended and it does not help prevent DVT. Compared
to LMWH, aspirin fared worse than placebo.
Both heparin and LMWH can be used as prophylaxis against DVT. LMWH
has a long half life and a decreased tendency to induce HIT. The LWMH do
not need monitoring and are cost effective.
Graded intermittent pneumatic stockings are also widely used and effective
in preventing DVT.
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Research Concepts:
Deep Venous Thrombosis Prophylaxis:
Choices:
1. Hyaline membrane disease
2. Congenital pulmonary lymphangiectasia
3. Total anomalous pulmonary venous connection
4. Group B Streptococcal pneumonia
Answer: 3 - Total anomalous pulmonary venous connection
Explanations:
In this patient the pulmonary veins do not go to the left atrium but rather
drain into systemic circulation or the right atrium.
It is dependent on the foramen ovale or atrial septal defect.
The increased pulmonary vasculature shows up as a granular pattern on
chest x-ray. The heart size in normal when the pulmonary veins are
unobstructed there in enlargement of the heart.
Medical treatment with intubation and pressors is initial treatment but
surgical repair is needed.
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Research Concepts:
Total Anomalous Pulmonary Venous Connection:
Choices:
1. Avoid high perfusion pressures
2. Avoid hypothermia
3. Avoid crystalloid cardioplegia
4. Avoid vein grafts
Answer: 2 - Avoid hypothermia
Explanations:
Sickle cell patients who undergo open heart surgery should be kept warm
and excessive cooling should be avoided
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Research Concepts:
Open-heart surgery, Sickle cell Hemoglobinopathy:
Choices:
1. Erythema around the incision on the second postoperative day
2. Excessive tenderness around the incision on the second postoperative day
3. Fever on the fifth postoperative day
4. Serous drainage from the incision on the first postoperative day
Answer: 3 - Fever on the fifth postoperative day
Explanations:
Wound infections are characterized by fever beginning on the fourth or fifth
postoperative day.
Erythema and excessive tenderness around the incision may also occur at
this time.
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Research Concepts:
Wound Infection:
Choices:
1. (End diastolic volume - end systolic volume) / (end diastolic volume)
2. End diastolic volume / end systolic volume
3. (End diastolic volume x end systolic volume) / 100
4. End diastolic volume - end systolic volume
Answer: 1 - (End diastolic volume - end systolic volume) / (end diastolic
volume)
Explanations:
Ejection fraction is the fraction of blood pumped out by the ventricles with
each heartbeat. The ejection fraction is the fraction of the end diastolic
volumes that is ejected with each beat.
A normal person has an ejection fraction of about 60-70%.
When the ejection fraction is less than 20% the prognosis is poor.
Ejection fraction is measured by echocardiography. Other methods to
measure ejection fraction include MRI, CT, and MUGA scan.
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Research Concepts:
Cardiac Physiology:
Choices:
1. Hydralazine
2. Prazosin
3. Lisinopril
4. Propranolol
Answer: 4 - Propranolol
Explanations:
Adverse effects of beta blockers include bronchospasm and alteration of
glucose and lipid metabolism.
There is a lot of evidence showing that beta blockers can worsen
hyperglycemia. They should not be used as first line drugs to treat diabetics.
In diabetics blood pressure should be reduced to less than 130/80 mmHg to
reduce morbidity and mortality.
ACE inhibitors are the drugs of choice in the management of hypertension
in diabetic patients. These drugs have been found to decrease vascular
smooth muscle proliferation and increase fibrinolysis, leading to improved
renal function in diabetics.
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Research Concepts:
Beta-Blockers:
Choices:
1. Aortic regurgitation
2. Mitral stenosis
3. Aortic stenosis
4. Hypertrophy
Answer: 1 - Aortic regurgitation
Explanations:
Marfan's syndrome is associated with aortic regurgitation
It is a connective tissue disorder
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Research Concepts:
Marfan Syndrome:
Aortic Regurgitation:
Choices:
1. The most likely agent is succinylcholine
2. The most common inherited cause is a mutation of E1 locus on the long
arm of chromosome 3
3. Succinylcholine has a half-life of over an hour.
4. The dibucaine number is high in these patients
Answer: 3 - Succinylcholine has a half-life of over an hour.
Explanations:
An ultra short-acting depolarizing skeletal muscle relaxant, succinylcholine
bonds with motor endplate cholinergic receptors to produce depolarization.
These cause fasciculations.
The neuromuscular block remains as long as sufficient quantities of
succinylcholine remain, and is characterized by a flaccid paralysis. The
elimination half-life of succinylcholine is estimated to be 47 seconds.
Inadvertent overdose, or patients deficient in pseudocholinesterase may
result in prolonged apnea.
Mechanical ventilation with oxygen should be used until recovery.
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Research Concepts:
Neuromuscular Blocking Agents:
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Research Concepts:
Lidocaine:
Choices:
1. Edema
2. Fatigue
3. Shortness of breath (SOB)
4. None of the above
Answer: 3 - Shortness of breath (SOB)
Explanations:
SOB is the cardinal symptom of LV failure
Other symptoms include tachycardia, fatigue and edema
New York Heart Association classifies heart failure and comprises 4
classes-I, II, III and IV
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Research Concepts:
Left Ventricular Failure:
Choices:
1. Use on the thorax in a patient with a cardiac arrhythmia
2. Use on a patient with a pacemaker
3. Use in an area with decreased blood flow
4. Use in the area of the carotid sinus (anterior neck)
Answer: 3 - Use in an area with decreased blood flow
Explanations:
Electrical stimulation increases blood flow, encourages wound contraction,
and decreases edema
It should not be used near metal staples, through malignant tissue, over the
carotid sinus, on the thorax of patients with cardiac problems, or in patients
with pacemakers
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Research Concepts:
Wound Healing:
Electrical Stimulation:
Choices:
1. Pregnancy
2. Infection
3. Stress
4. Starvation
Answer: 4 - Starvation
Explanations:
Any stress condition can precipitate diabetic ketoacidosis
Among common conditions, pregnancy, infection and non-compliance to
medication and diet usually trigger DKA
Starvation is also a stressful factor but it often leads to hypoglycemia
especially in patients who are on insulin therapy
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Research Concepts:
Diabetic Ketoacidosis:
Choices:
1. Patent ductus arteriosus
2. Tetralogy of Fallot
3. Ventricular septal defect
4. Atrial septal defect
Answer: 2 - Tetralogy of Fallot
Explanations:
Only TOF is characterized by right to left shunt
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Research Concepts:
Tetralogy Of Fallot:
Choices:
1. Chest radiograph
2. CT of the chest
3. Pericardiocentesis
4. Electrocardiogram
Answer: 3 - Pericardiocentesis
Explanations:
The patient has pericardial tamponade and requires emergent
pericardiocentesis
There is no time for investigative studies but transesophageal
echocardiogram is the procedure of choice
Beck's triad includes hypotension, muffled heart sounds, and JVD
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Research Concepts:
Cardiac Tamponade:
Choices:
1. Beta blocker
2. ACE inhibitor
3. Calcium channel blocker
4. Analgesic
Answer: 2 - ACE inhibitor
Explanations:
The Survival and Ventricular Enlargement trial demonstrated that ACE
inhibitors can lower the mortality of left ventricular dysfunction
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Research Concepts:
Angiotensin Converting Enzyme Inhibitors (ACEI):
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Research Concepts:
Preload:
Choices:
1. Lysine hydroxylase deficiency
2. Decreased translation of collagen III
3. Procollagen peptidase deficiency
4. A collagen I mutation
Answer: 2 - Decreased translation of collagen III
Explanations:
Hyperextensible skin and hypermobile joints is secondary to a collagen
defect in Ehlers-Danlos syndrome
There are many types of Ehlers-Danlos syndrome with varying severity
Type IV is characterized by either aortic or intestinal rupture secondary to a
deficiency in transcription or translation of collagen III
Type VI manifests in rupturing of the eyeball secondary to a deficiency in
lysine hydroxylase that results in a decrease in collagen glycosylation
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Research Concepts:
Ehlers-Danlos Syndrome:
Choices:
1. Lidocaine
2. Digoxin
3. Sodium lactate
4. Diuretics
Answer: 3 - Sodium lactate
Explanations:
All class 1 anti-arrhythmic agents have the potential to cause arrhythmias.
Torsades can occur with quinidine.
Hyperkalemia can worsen the toxicity of class 1 anti-arrhythmic agents.
Treatment of overdose is with sodium lactate, which can reverse the
hypotension and arrhythmias.
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Research Concepts:
Antiarrhythmic Medication:
Choices:
1. Bleeding time
2. PTT
3. PT and INR
4. Anti-Xa assay
Answer: 4 - Anti-Xa assay
Explanations:
Monitoring the levels of LMWH is usually not necessary but may be done
using the anti-Xa assay
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Research Concepts:
Low Molecular Weight Heparin (LMWH):
Choices:
1. Coarctation of aorta
2. Ebstein's Anomaly
3. Tetralogy of Fallot
4. Patent ductus arteriosus
Answer: 3 - Tetralogy of Fallot
Explanations:
A brain abscess is more common in congenital heart diseases with right to
left shunts.
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Research Concepts:
Brain Abscess:
Tetralogy Of Fallot:
Choices:
1. Delirium
2. Paranoid personality disorder
3. Depression
4. Generalized anxiety disorder
Answer: 1 - Delirium
Explanations:
Delirium is the single most common acute mental disorder affecting adults
in the hospital
It occurs in 10-20% of hospitalized adults, 30-40% of elderly patients, and
80% of ICU patients
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Research Concepts:
Delirium:
Choices:
1. Cephalexin
2. Cefazolin
3. Cefotetan
4. Cefoperazone
Answer: 1 - Cephalexin
Explanations:
When alcohol is consumed after ingestion of these drugs, severe nausea,
flushing, and vomiting may occur.
Cephalexin is a first-generation antibiotic, which does not cause a
disulfiram-like reaction.
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Research Concepts:
Cephalosporins, Antabuse effect:
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Research Concepts:
Sensory Monotony:
Choices:
1. Erythromycin
2. Gentamicin
3. Amikacin
4. Metronidazole
Answer: 4 - Metronidazole
Explanations:
C. difficile infection can occur after prolonged antibiotic therapy
This infection is commonly termed as pseudomembranous colitis
Metronidazole is a drug of choice for this anaerobic infection
Vancomycin is also effective.
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Research Concepts:
Pseudomembranous Colitis:
Choices:
1. They can be used as monotherapy for pheochromocytoma
2. They can be used to treat a migraine
3. They can be used to treat variceal bleeds
4. They can be used to treat an essential tremor
Answer: 1 - They can be used as monotherapy for pheochromocytoma
Explanations:
Beta-blockers should only be used in pheochromocytoma after alpha
blockade has taken place.
The treatment of pheochromocytoma is usually with 2 or more agents.
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Research Concepts:
Beta-Blockers:
Choices:
1. Penicillin
2. Non-dihydropyridine calcium channel blocker
3. Dihydropyridine calcium channel blocker
4. NSAIDs
Answer: 2 - Non-dihydropyridine calcium channel blocker
Explanations:
A non-dihydropyridine calcium channel blocker (e.g. verapamil or
diltiazem) is next best choice when beta-blockade is contraindicated
Penicillin is an antibiotic and has no place in treatment of UA
NSAIDs also have no place in the treatment of UA
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Research Concepts:
Angina, Unstable:
Choices:
1. Patent ductus arteriosus but no pulmonary hypertension
2. Atrial septal defect
3. Completely anomalous pulmonary venous return
4. Left coronary artery arising from the pulmonary trunk
Answer: 3 - Completely anomalous pulmonary venous return
Explanations:
Completely anomalous pulmonary venous return results in oxygenated
blood returning to the right atrium
There will be atrial septal defect with right to left shunt and probable
cyanosis
Atrial septal defect alone will result in a left to right shunt as will PDA
without hypertension
When the left coronary artery arises from the pulmonary trunk, drop in
pulmonary pressure causes reversal of flow. 20% of patients survive to
adulthood because of flow from the right coronary artery
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Research Concepts:
Totally Anomalous Pulmonary Venous Return:
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Research Concepts:
Vancomycin:
Choices:
1. Dipyridamole/Thallium
2. Treadmill
3. Exercise Echo
4. Holter monitor
Answer: 3 - Exercise Echo
Explanations:
Graded exercise stress testing can be performed alone or in combination
with echo or myocardial perfusion tests. Exercise test alone has lower
sensitivity and specificity but it is the cheapest
Stress echo can be used to assess segmental wall motion during exercise.
Ischemic segments become hypokinetic or akinetic during exercise
Thallium is widely used to assess myocardial perfusion. The presence of
increased lung uptake with thallium indicates poor prognosis and suggests
triple vessel or left main disease
In recent years, coronary artery calcium measurements by CT scan have
become popular. One should use caution with the data obtained as most
information is from elective outpatients who are asymptomatic
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Research Concepts:
Coronary Artery Disease:
Choices:
1. Fever
2. Weight loss
3. Cervical nodes
4. Anorexia
Answer: 3 - Cervical nodes
Explanations:
As in primary lymphomas, the most common presentation is that of
adenopathy.
Extra nodal tumors are more common than nodal tumors.
Occasionally lymphoma may develop in the transplanted graft.
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Research Concepts:
Posttransplant Lymphoproliferative Disease:
Explanations:
The triad of aortic stenosis symptoms includes angina, syncope, and
dyspnea.
Once symptoms develop, the prognosis is worse. Congestive heart failure
carries a grave prognosis and only 60% of individuals are alive at 2 years.
When patients with aortic stenosis develop syncope, the 3-year mortality is
50%.
Angina in the presence of aortic stenosis is associated with 5 year 50%
mortality rate.
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Research Concepts:
Aortic Stenosis:
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Research Concepts:
Nitroglycerin:
Choices:
1. Stent placed via the groin
2. Femoral cannulation and circulatory arrest
3. Median sternotomy and rapid cannulation
4. Antibiotics for 6 weeks followed by surgery
Answer: 2 - Femoral cannulation and circulatory arrest
Explanations:
This patient has a false aneurysm, which is 6 cms.
The infected graft must be replaced or it will rupture. When replacing the
graft, the status of the AVR must be known, since it may also be infected.
The best approach to such a patient is to proceed with femoral cannulation,
arrest the patient prior to opening the chest.
A median sternotomy without femoral access is too dangerous and risks
lacerating the aorta.
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Research Concepts:
False Aneurysm:
Aortic Valve:
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Research Concepts:
Pulmonary Embolism:
Pulmonary Embolism:
Choices:
1. Vancomycin
2. Sulfonamide
3. Rifampin
4. Tetracycline
Answer: 1 - Vancomycin
Explanations:
IV vancomycin can produce a histamine-mediated erythematous flushing of
the face, neck and trunk with possibility of associated hypotension.
Vancomycin causes two hypersensitivities reactions, Red Man syndrome
and anaphylaxis.
Red Man syndrome is associated with rapid infusion thus slow IV
administration will minimize adverse effects.
Stopping the IV and giving diphenhydramine will abort most reactions.
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Research Concepts:
Red Man Syndrome:
Vancomycin:
Choices:
1. Majority occur in the right cardiophrenic angle
2. They communicate with the pericardial cavity
3. They do not require excision
4. They can be aspirated
Answer: 2 - They communicate with the pericardial cavity
Explanations:
Pericardial cysts do not communicate with the pericardial space between
visceral and parietal pericardium. They are asymptomatic.
They present as a unilocular mass. An occasional patient may present with
chest heaviness.
Diagnosis is usually evident on a chest radiograph and chest CT. Majority
are located in the right cardiophrenic angle.
VATS is fast becoming an effective technique for removal of these cysts. If
the diagnosis is not certain, advanced imaging should be utilized.
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Research Concepts:
Pericardial Cyst:
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Research Concepts:
General Anesthesia:
Choices:
1. Prior intracranial hemorrhage (ICH)
2. Suspected aortic dissection
3. Ischemic stroke within 9 months
4. Active bleeding
Answer: 3 - Ischemic stroke within 9 months
Explanations:
AMI is a leading cause of morbidity and mortality in the United States
Ischemic stroke within 3 months is an absolute contraindication to
thrombolytic therapy for STEMI
For STEMI, door-to-drug time should be no longer than 30 minutes
Thrombolytic therapy is not indicated in the treatment of non-ST-segment
elevation MI (NSTEMI)
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Research Concepts:
Thrombolysis:
Choices:
1. Calcium is approximately 40% albumin bound
2. The calcium level will fall approximately 0.8 mg/dL for each gram/dL
decrease in serum albumin
3. The goal of calcium replacement is to maintain the level between 8 and 9
mg/dL
4. Calcium is approximately 80% albumin bound
Answer: 4 - Calcium is approximately 80% albumin bound
Explanations:
Calcium is approximately 40% albumin bound.
Calcium levels must be interpreted with albumin levels taken into account.
Total and ionized calcium need to evaluated.
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Research Concepts:
Calcium:
Choices:
1. Malignancy
2. Dilutional
3. Long surgery time
4. Adverse drug reaction
Answer: 2 - Dilutional
Explanations:
Dilutional thrombocytopenia is the most common cause of intraoperative
thrombocytopenia.
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Research Concepts:
Thrombocytopenia:
Choices:
1. Hypercoagulability state
2. Embolization of mural thrombi
3. Widespread atherosclerosis
4. Generalized vasoconstriction
Answer: 2 - Embolization of mural thrombi
Explanations:
Myocardial infarction may cause dyskinesis of an area of myocardium,
leading to mural thrombi, clots by the wall.
The most common cause of mural thrombi is anterior wall myocardial
infarction.
The thrombus can embolize causing infarcts anywhere in the body.
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Research Concepts:
Myocardial Infarction, Acute:
Choices:
1. Right atrium
2. Left atrium
3. Left ventricle
4. Right ventricle
Answer: 2 - Left atrium
Explanations:
Pulmonary capillary wedge pressure is approximately the same as left atrial
pressure.
Left-sided cardiac catheterization can measure pressure in the left ventricle
but not in the left atrium.
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Research Concepts:
Swan-Ganz Catheterization:
Choices:
1. How to take digoxin
2. How to monitor his pulse rate
3. The common side effects of digoxin
4. The etiology of his atrial fibrillation
Answer: 4 - The etiology of his atrial fibrillation
Explanations:
Although the etiology of the patient's atrial fibrillation may be explained, it
is more important that he understands the other issues
Digoxin needs to be taken as directed to avoid toxicity
Side effects such as bradycardia, hypotension, and arrhythmias are possible
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Research Concepts:
Atrial Fibrillation:
Digoxin:
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Research Concepts:
Staphylococcal Infections:
Choices:
1. Calculation of cardiac output
2. Angiotensin converting enzyme (ACE) inhibitors
3. Sublingual nitroglycerin
4. Beta-blockers
Answer: 4 - Beta-blockers
Explanations:
Perioperative beta-blockers have been shown to decrease rates of MI and
cardiac death in patients with cardiac ischemia undergoing vascular surgery
Beta-blockers can reduce 30-day mortality by as much as 50%
They can also reduce 1-year mortality by as much as 50%
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Research Concepts:
Coronary Artery Disease:
Vascular Surgery:
Choices:
1. Intranasal oxygen
2. Chewable aspirin
3. Cholesterol measurement
4. Atenolol
Answer: 3 - Cholesterol measurement
Explanations:
Lipid profiles drawn during the acute event do not alter treatment
Intranasal oxygen, beta-blockers, and chewable aspirin are measures that
are needed urgently
Immediate actions are aimed to reduce the degree of ischemia
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Research Concepts:
Acute Myocardial Infarction:
Choices:
1. Insulin
2. Albuterol
3. Calcium
4. Magnesium
Answer: 4 - Magnesium
Explanations:
Calcium gluconate is the drug of choice in hyperkalemia with ECG
changes.
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Research Concepts:
Heart Failure, Congestive:
Hyperkalemia:
Choices:
1. Hypokalemia
2. Uremia
3. Platelet dysfunction
4. Metabolic acidosis
Answer: 1 - Hypokalemia
Explanations:
Decreased renal function leads hyperkalemia, metabolic acidosis.
Uremia inhibits platelet aggregation.
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Research Concepts:
Renal Failure, Chronic:
Choices:
1. Psoriasis
2. Aortic regurgitation
3. Onychomycosis
4. Lead poisoning
Answer: 2 - Aortic regurgitation
Explanations:
Quincke sign is to detect aortic regurgitation (AR). There is alternating
blanching and blushing of the fingernail bed with light compression.
Corrigan sign is also seen in AR. It is pulsation of the carotid arteries.
Hill sign is systolic pressure greater than or equal to 60 mm Hg at the
popliteal artery.
Large volume pulse, another sign of AR, is called a water-hammer pulse.
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Research Concepts:
Aortic Regurgitation:
Quincke Sign:
Choices:
1. History of smoking and immobility
2. Ischemic cardiomyopathy
3. Asthenia
4. Orthopedic procedures
Answer: 1 - History of smoking and immobility
Explanations:
Risk of postoperative atelectasis is increased by immobility, history of
smoking, and procedures on the abdomen or thorax.
Other risk factors for post-operative atelectasis include obesity, muscular
weakness, and abdominal distension.
Further additional risk factors include a prior history of asthma or
respiratory infections.
Pregnancy is also a known risk factor for developing post-op atelectasis.
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Research Concepts:
Atelectasis:
Choices:
1. Cardiac tamponade
2. Pulmonary hypertension
3. Pneumothorax
4. Pulmonary fibrosis
Answer: 3 - Pneumothorax
Explanations:
Pneumothorax is associated with decreased breath sounds unilaterally and
asymmetrical chest movement.
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Research Concepts:
Pneumothorax:
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Research Concepts:
Pain Assessment:
Choices:
1. Morphine
2. Nalbuphine
3. Hydromorphone
4. Meperidine
Answer: 2 - Nalbuphine
Explanations:
Nalbuphine is a mixed opioid agonist-antagonist.
It is the only one available in the United States.
It may cause withdrawal symptoms in patients chronically receiving
opioids.
It may be effective for morphine-induced pruritus.
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Research Concepts:
Opioids:
Choices:
1. Methyldopa
2. Clonidine
3. Acebutolol
4. Labetalol
Answer: 4 - Labetalol
Explanations:
Labetalol has both alpha and beta blocking activity.
Labetalol is used to treat hypertension.
High doses can cause atrioventricular block and hypotension.
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Research Concepts:
Beta-Blockers:
Alpha-Blockers:
Choices:
1. ICU patients usually have lower insulin requirements than non-ICU patients
2. ICU patients have lower pain tolerance to subcutaneous injections than non-
ICU patients
3. ICU patients often have unpredictable absorption of drugs administered
subcutaneously
4. ICU nurses are more familiar with administering drugs by intravenous
infusion than by subcutaneous injection
Answer: 3 - ICU patients often have unpredictable absorption of drugs
administered subcutaneously
Explanations:
ICU patients often have impaired peripheral perfusion and/or peripheral
edema, both of which can cause unpredictable absorption of subcutaneous
drugs
Therefore, it is generally more reliable to administer medications (including
insulin) by the intravenous than subcutaneous route
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Research Concepts:
Subcutaneous Insulin:
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Research Concepts:
Frank–Starling Law:
Choices:
1. Potassium administration
2. Calcium administration
3. Lidocaine administration
4. Fab fragment antibodies
Answer: 2 - Calcium administration
Explanations:
Hypercalcemia can trigger digitalis toxicity
Calcium administration can worsen digitalis toxicity
Potassium and magnesium supplementation are essential measures in
digitalis toxicity
Lidocaine can improve the arrhythmia and Fab fragments neutralize excess
digoxin in the serum
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Research Concepts:
Digoxin Toxicity:
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Research Concepts:
Positive End-Expiratory Pressure (PEEP):
Choices:
1. Dobutamine
2. Nitroglycerin
3. IVIG
4. Norepinephrine
Answer: 4 - Norepinephrine
Explanations:
Vasopressor norepinephrine is used if dopamine has been ineffective
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Research Concepts:
Norepinephrine:
Choices:
1. Should not receive it; iodinated contrast is absolutely contraindicated in
patients on Metformin
2. Should have Metformin withheld for 7 days after contrast is administered
3. Are at risk for hepatic failure
4. Are at risk for lactic acidosis
Answer: 4 - Are at risk for lactic acidosis
Explanations:
Glucophage should be held for 48 hours after the iodinated contrast
administration.
It need not be withheld for any significant time prior to contrast
administration.
Toxicity risk is greatest in those diabetics who also have renal insufficiency.
Each radiology department or outpatient center administering IV iodinated
contrast should have a clear protocol as to who is responsible (radiologist,
ordering physician, primary care practitioner) for informing the patient
about the 2 day hiatus in metformin administration. If the dispensing
physician is concerned about the 2 day hiatus, a discussion of risks and
benefits (CIN vs non-contrast CT vs other imaging modalities) is in order.
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Research Concepts:
Iodinated Intravenous Contrast:
Metformin:
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Question 1211: In a patient with acute respiratory distress syndrome,
which treatment is unlikely to help?
Choices:
1. Steroids
2. Diuretics
3. Antibiotics
4. Oxygen
Answer: 1 - Steroids
Explanations:
ARDS is associated with pulmonary edema
Steroid is not indicated for ARDS
Supportive care is necessary
Steroids can reduce ventilator dependent days but has not been shown to
effect long term survival
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Research Concepts:
Acute Respiratory Distress Syndrome:
Choices:
1. Application of elastase
2. Wound irrigation
3. Wet-to-dry dressings
4. Sharp debridement
Answer: 4 - Sharp debridement
Explanations:
Sharp debridement involves using forceps, scalpel or scissors to selectively
remove necrotic or nonviable tissue
The other options all are nonselective debridement and can remove healthy
or healing tissue
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Research Concepts:
Debridement:
Choices:
1. Lower the patient to the floor
2. Place the patient in the lateral decubitus position
3. Place a rubber bite block in the mouth to prevent tooth breakage
4. Put a pillow under the head
Answer: 3 - Place a rubber bite block in the mouth to prevent tooth breakage
Explanations:
A patient having a generalized seizure should be placed so as not to injure
themselves.
Lowering the patient to the floor, turning them to one side to clear oral
secretions, and placing a pillow under the head are all appropriate.
Nothing should be put into the patient's mouth. Efforts to do that may lead
to bites of the healthcare worker and choking or aspiration of the seizing
patient.
Nearby objects should be moved to avoid the patient hitting them
accidentally.
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Research Concepts:
Seizure, Generalized Tonic-clonic:
Choices:
1. Narcotic overdose
2. Hyperkalemia
3. Acute crush injuries
4. Acute renal failure
Answer: 1 - Narcotic overdose
Explanations:
Succinylcholine is often used as a paralytic agent for endotracheal
intubation
It is contraindicated in patients that may have hyperkalemia as it may cause
further increase with fatal arrhythmias
Tumor lysis syndrome, rhabdomyolysis, muscular dystrophy are all
additional contraindications
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Research Concepts:
Succinylcholine:
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Research Concepts:
Heart Failure, Congestive:
Digoxin:
Choices:
1. Adrenal insufficiency
2. Hypovolemia
3. Steroid induced diabetes
4. Diabetic ketoacidosis
Answer: 4 - Diabetic ketoacidosis
Explanations:
Diabetic ketoacidosis is a state of insulin deficiency characterized by
hyperglycemia, dehydration, and metabolic acidosis. As the disorder
progresses it can quickly lead to hypoglycemia, hyponatremia, and
hypokalemia.
Causes of diabetic ketoacidosis include myocardial infarction, trauma,
stress, cocaine, surgery, dental abscesses, and missed insulin treatments.
The absence of insulin means that glucose is not taken up by the cells.
Other counter-regulatory hormones enhance fat breakdown into fatty acids,
causing diabetic ketoacidosis. Beta-oxidation of free fatty acids leads to the
formation of ketone bodies.
The hyperglycemic-induced osmotic diuresis depletes sodium, potassium,
phosphate, and water. The serum potassium can drop significantly and this
electrolyte must be monitored.
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Research Concepts:
Perforated Peptic Ulcer:
Diabetic Ketoacidosis:
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Question 1217: Who is most qualified to explain a surgical procedure?
Choices:
1. Ward nurse
2. Surgeon
3. Anesthesia care provider
4. Scrub nurse
Answer: 2 - Surgeon
Explanations:
The surgeon is the only person in this list qualified to explain the surgical
procedure.
At teaching institutions, attending physicians may delegate this
responsibility to a physician resident or fellow.
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Research Concepts:
Informed Consent:
Choices:
1. Lung hypoplasia
2. Ventricular septal defect
3. Atrial septal defect
4. Transposition of the great vessels
Answer: 4 - Transposition of the great vessels
Explanations:
Transposition of the great vessels causes a right-to-left shunt.
Patients are likely cyanotic.
The other options involve shunting of oxygenated blood to the pulmonary
circulation. They therefore do not result in early cyanosis.
Tetralogy of Fallot has a VSD combined with pulmonary artery atresia.
This results in decreased blood flow in the pulmonary system which leads
to cyanosis.
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Research Concepts:
Transposition Of The Great Arteries:
Choices:
1. Rhinovirus
2. Epstein-Barr virus
3. Coxsackie virus
4. Adenovirus
Answer: 3 - Coxsackie virus
Explanations:
Acute viral pericarditis is most often caused by coxsackievirus B.
Influenza A and B are seasonal causes.
Other viruses that can cause this condition include echovirus, adenoviruses,
enterovirus, mumps virus, Epstein-Barr virus, and human
immunodeficiency virus (HIV).
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Research Concepts:
Pericarditis:
Choices:
1. Isoproterenol
2. Nitric oxide
3. Prostaglandin
4. Nitrous oxide
Answer: 4 - Nitrous oxide
Explanations:
Nitrous oxide is an anesthetic gas and not a pulmonary artery vasodilator.
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Research Concepts:
Cardiac Physiology:
Pulmonary Physiology:
Choices:
1. End expiration
2. End inspiration
3. Mid inspiration
4. Onset of inspiration
Answer: 1 - End expiration
Explanations:
Wedge pressure should be measured at end expiration in a non-ventilated
patient.
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Research Concepts:
Swan-Ganz Catheterization:
Choices:
1. Sedation
2. Nasotracheal suctioning
3. Head elevation
4. Bronchodilator therapy
Answer: 1 - Sedation
Explanations:
Sedation is usually avoided to prevent hypoventilation
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Research Concepts:
Sedation:
Respiratory Distress/Failure:
Choices:
1. Aspartate transaminase
2. Alkaline phosphatase
3. Creatine kinase
4. Lactate dehydrogenase
Answer: 3 - Creatine kinase
Explanations:
Elevation in creatine kinase is one of the criteria used in diagnosing an
myocardial infarction.
The peak elevation of creatine kinase occurs within 24 hrs and subsides
over the next 24-48 hrs.
CK(MB) levels usually revert back to normal in 2-3 days.
If a re-infarct occurs, then elevation in CK(MB) levels will again appear.
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Research Concepts:
Myocardial Infarction, Acute:
Choices:
1. Pneumonia
2. Pulmonary hypertension
3. Atelectasis
4. Bronchiectasis
Answer: 2 - Pulmonary hypertension
Explanations:
Pulmonary hypertension does not benefit from chest percussion therapy
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Research Concepts:
Chest Physical Therapy:
Pulmonary Hypertension:
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Research Concepts:
Verapamil:
Choices:
1. Beta agonist
2. Recent aspirin
3. Hyperlipidemia
4. Abnormal stress test
Answer: 2 - Recent aspirin
Explanations:
The TIMI score identifies patient that would benefit from early intervention
Risk factors include age greater than 65, prior stenosis greater than 50%, 3
or more cardiac risk factors, angina 2 times in less than 24 hours, ST
segment deviation greater than 0.5 mm, 3 or more cardiac risk factors,
elevated cardiac enzymes, and aspirin usage within 7 days
The fact that the patient had unstable angina on aspirin make is possible
that he is aspirin resistant
This resistance can occur in 5 to 10% of the population
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Research Concepts:
Angina, Unstable:
Aspirin Resistance:
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Research Concepts:
Tacrolimus:
Choices:
1. Heparin
2. Morphine
3. Propranolol
4. Hydralazine
Answer: 1 - Heparin
Explanations:
Heparin or a similar anticoagulant is generally co-administered with t-PA.
This is done to prevent re-occlusion of the artery after successful clot lysis
by t-PA.
Adjunctive anticoagulation is continued for 2 to 8 days after t-PA therapy.
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Research Concepts:
Tissue Plasminogen Activator:
Choices:
1. CXR
2. CT
3. Ultra sound
4. Clinical
Answer: 1 - CXR
Explanations:
A simple chest radiograph can help to rule out pneumothorax.
CXR is the best test to follow the progression of pneumothorax.
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Pneumothorax:
Choices:
1. Five minutes
2. Ten minutes
3. Twenty minutes
4. Thirty minutes
Answer: 2 - Ten minutes
Explanations:
Fentanyl has a fast onset time
Roughly ten minutes after an IM injection, most people find pain relief
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Research Concepts:
Fentanyl:
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Research Concepts:
Furosemide:
Choices:
1. Induction of labor
2. Cough suppression
3. Treatment of diarrhea
4. Pain management
Answer: 1 - Induction of labor
Explanations:
Morphine is not used in the treatment of labor
Morphine causes a reduction in uterine tone and cause a prolongation of
labor
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Research Concepts:
Morphine:
Choices:
1. Epstein-Barr virus (EBV)
2. Cytomegalovirus (CMV)
3. Human papillomavirus (HPV)
4. Human immunodeficiency virus (HIV)
Answer: 1 - Epstein-Barr virus (EBV)
Explanations:
Post-transplant lymphoma is caused by latent Epstein-Barr virus infections.
In addition to Epstein-Barr virus, cytomegalovirus has also been implicated
in post-transplant lymphoproliferative malignancy.
The most common presentation is a lymphoid swelling, usually of the
cervical or groin lymph nodes.
Reduction in immunosuppression is the first intervention. Anti CD 20
monoclonal antibody has shown some promise.
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Research Concepts:
Posttransplant Lymphoproliferative Disease:
Choices:
1. Ventricular arrhythmias
2. Thromboembolism
3. Congestive heart failure
4. Mitral regurgitation
Answer: 4 - Mitral regurgitation
Explanations:
Mitral regurgitation is rare with left ventricular aneurysm
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Research Concepts:
Ventricular Aneurysms:
Choices:
1. B complex vitamins
2. Fat-soluble vitamins
3. Serum potassium
4. Albumin
Answer: 2 - Fat-soluble vitamins
Explanations:
The fat-soluble vitamins A, D, E, and K may also be excreted along with
bile acids during antilipemic therapy. B complex vitamins and the other
water-soluble vitamins are affected very little by colestipol (Colestid).
Serum potassium is affected little by colestipol (Colestid).
Albumin levels are affected very little by colestipol (Colestid).
Patient Need: Physiological Integrity
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Research Concepts:
Bile Acid Sequestrant:
Choices:
1. Right and left cusps
2. Right and non-coronary cusps
3. Left and non-coronary cusps
4. Left coronary and right coronary arteries
Answer: 1 - Right and left cusps
Explanations:
The fusion of the bicuspid valve is along the right and left coronary cusps.
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Research Concepts:
Aortic Valve:
Choices:
1. Captopril
2. Propranolol
3. Lidocaine
4. Labetalol
Answer: 3 - Lidocaine
Explanations:
Lidocaine is an amide local anesthetic.
Lidocaine is considered to be a highly selective, group 1B anti-arrhythmic
agent.
Lidocaine is used for nerve blocks and post-myocardial infarction ischemic
ventricular arrhythmias.
High doses of lidocaine can result in central nervous system excitation.
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Research Concepts:
Arrhythmias:
Choices:
1. Acidosis
2. Alkalosis
3. Hypermagnesemia
4. Hyponatremia
Answer: 2 - Alkalosis
Explanations:
Potassium ions are exchanged with hydrogen (H+) ions in the kidneys.
Therefore, hypokalemia leads to increased H+ excretion.
Hypokalemia often leads to metabolic alkalosis and vice versa.
Hypomagnesemia also commonly accompanies hypokalemia.
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Research Concepts:
Metabolic Alkalosis:
Hypokalemia:
Choices:
1. Have held their position for at least 5 years
2. Provide their testimony free of charge
3. Discuss their testimony with the claimant
4. Review all pertinent information and records
Answer: 4 - Review all pertinent information and records
Explanations:
Expert witnesses provide opinions on information they have reviewed about
the claimants case
They do not discuss the case with the claimant and in some instances are
paid for their time
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Research Concepts:
Expert Witness:
Explanations:
Esmolol is a very short acting beta blocker for intravenous administration
of atrial arrhythmias and hypertension.
The majority of beta blockers are commonly used as prophylactic agents in
patients who have had an MI.
These agents can also decrease atrial arrhythmias.
Use should be cautioned in patients with poor ejection fraction as these
agents are negatively inotropic.
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Research Concepts:
Beta-Blockers:
Choices:
1. Dantrolene
2. Vecuronium
3. Morphine
4. Baclofen
Answer: 3 - Morphine
Explanations:
Morphine can cause histamine release resulting in pruritis
Tolerance develops to this side effect
Dantrolene blocks Ca2+ at the sarcoplasmic reticulum
Baclofen is a centrally acting muscle relaxant
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Research Concepts:
Histamine:
Morphine:
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Research Concepts:
Abdominal Aortic Aneurysm:
Choices:
1. Pericardiophrenic vessels
2. Internal mammary
3. Coronary arteries
4. Musculophrenic arteries
Answer: 1 - Pericardiophrenic vessels
Explanations:
The pericardiophrenic artery arises from the internal thoracic artery.
It travels with the phrenic nerve between the mediastinal pleura and
pericardium.
It supplies the diaphragm and anastomoses with the inferior phrenic and
musculophrenic arteries.
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Research Concepts:
Pericardiophrenic Vessels:
Choices:
1. Atrial fibrillation (AF)
2. Supraventricular tachycardia (SVT)
3. Atrial flutter
4. Accelerated junctional tachycardia
Answer: 3 - Atrial flutter
Explanations:
Atrial flutter results in the classic "saw tooth" pattern on ECG
Pattern can be seen best in inferior ECG leads (II, III and aVF)
SVT can sometimes be aborted by vagal maneuvers
Vagal maneuvers should only be attempted in younger patients
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Research Concepts:
Atrial Flutter:
Choices:
1. Greater than 5 premature ventricular contractions per minute
2. Emergency surgery
3. Age
4. Myocardial infarction 4 months ago
Answer: 4 - Myocardial infarction 4 months ago
Explanations:
Elderly patients have a decreased physiological reserve. There is higher
morbidity with complications. Age alone is not a contraindication to
surgery.
Emergency surgery results in increased morbidity and mortality.
Poorly controlled heart failure and unstable angina are relative
contraindications for anesthesia.
Other factors that affect risk include general medical condition, renal
failure, liver failure, and type of surgery.
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Research Concepts:
Preoperative Evaluation And Management:
Choices:
1. Allow the patient to express her feelings
2. Consult a chaplain
3. Inform a family member
4. Prescribe antidepressants
Answer: 1 - Allow the patient to express her feelings
Explanations:
It is important to allow patients to express their feelings and to respond to
them in a non-threatening non-judgmental way.
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Research Concepts:
Counseling:
Choices:
1. Complement levels
2. HLA crossmatch
3. Mixed lymphocyte culture
4. Biopsy
Answer: 4 - Biopsy
Explanations:
There is no blood test that can identify a graft versus host reaction.
Biopsy is the primary tool for evaluation suspected graft versus host
disease.
The diagnosis can be complicated from other viral exanthems and drug
eruptions and requires clinical correlation.
Overwhelming sepsis is the most common causes of death in acute graft
versus host reaction.
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Research Concepts:
Graft Versus Host Disease:
Choices:
1. Repeat indomethacin
2. Thoracoscopic ligation
3. Posterior incision for direct clipping
4. PDA division and oversewing
Answer: 3 - Posterior incision for direct clipping
Explanations:
Thoracoscopy offers no advantage
PDA division and oversewing requires a large incision and may be risky
Further usage of indomethacin is unlikely to be successful
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Research Concepts:
Patent Ductus Arteriosus:
Choices:
1. Reassure her that everything will be fine
2. Have a family member try to calm her down
3. Answer all her questions and give her as much information as possible
4. Ask the chaplain to visit with the patient
Answer: 3 - Answer all her questions and give her as much information as
possible
Explanations:
Patients should given as much information as they request and all their
questions should be addressed.
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Research Concepts:
Informed Consent:
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Research Concepts:
Warfarin:
Atrial Fibrillation:
Choices:
1. Increases
2. Decreases
3. No changes
4. Increases by four folds
Answer: 2 - Decreases
Explanations:
The concentration of carbon dioxide is inversely proportional to the
ventilation rate.
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Research Concepts:
Ventilator Management:
Choices:
1. Renal failure
2. Stroke
3. Myocardial infarct
4. Ischemic bowel
Answer: 3 - Myocardial infarct
Explanations:
Macro-vascular disease is the leading cause of death in people with
diabetes.
At least 60 percent of people with diabetes eventually die of cardiac
complications.
Moreover, the risk of stroke is double that of non-diabetics and the risk of
peripheral vascular disease is 4 times that of the normal population.
Thus, lipid abnormalities must be treated very aggressively.
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Research Concepts:
Diabetes Mellitus, Type 1:
Choices:
1. Prosthetic heart valves
2. Prior history of SBE
3. Congenital heart disease with prosthetic patch or prosthetic device
4. CABG
Answer: 4 - CABG
Explanations:
Antibiotic prophylaxis against SBE is recommended for the patients listed
above, except CABG patients,
Prophylaxis is not indicated in patients with an isolated ASD, CABG,
physiologic murmurs, previous Kawasaki disease without valve
dysfunction, and in those with defibrillators or pacemakers.
Other indications include unrepaired cyanotic heart disease and valvular
disease after transplant
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Research Concepts:
Subacute Bacterial Endocarditis (SBE) Prophylaxis:
Choices:
1. Dantrolene
2. Baclofen
3. Succinylcholine
4. Atracurium
Answer: 3 - Succinylcholine
Explanations:
Malignant hyperthermia is characterized by hyperthermia and muscular
rigidity
It is caused by excessive release of calcium from sarcoplasmic reticulum
The drug commonly implicated in this situation is succinylcholine
The treatment for this condition is dantrolene
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Research Concepts:
Malignant Hyperthermia:
Succinylcholine:
Choices:
1. Valsalva
2. Squatting
3. Leaning forward
4. Lying supine
Answer: 1 - Valsalva
Explanations:
Asymmetric interventricular septal hypertrophy is seen with hypertrophic
cardiomyopathy
This causes dynamic outflow obstruction
If left ventricular filling is decreased the intensity of the murmur will
increase
Both valsalva and standing will achieve this
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Research Concepts:
Hypertrophic Obstructive Cardiomyopathy:
Choices:
1. 25%
2. 50%
3. 75%
4. 100%
Answer: 3 - 75%
Explanations:
The bioavailability of IV digoxin is 100%
The bioavailability of PO digoxin is 75%
When converting from IV to PO digoxin there is a 25% decrease in
bioavailability
When converting from PO to IV digoxin there is a 25% increase in
bioavailability
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Research Concepts:
Digoxin:
Bioavailability:
Choices:
1. Fresh frozen plasma
2. Vitamin K
3. Platelets
4. Cryoprecipitate
Answer: 3 - Platelets
Explanations:
Heparin-induced thrombocytopenia occurs in about 5% of patients
receiving heparin. Auto-antibodies are directed towards the heparin/platelet
complex.
Cardiac patients routinely receive heparin and become sensitized to even
small amounts of heparin flush. Thrombocytopenia occurs, and if heparin is
stopped, the platelets recover.
Patients may harbor antibodies and the diagnosis can be confirmed by
platelet aggregation in the presence of serum. All elective cardiac surgery
should be postponed.
If a patient is bleeding from heparin-induced thrombocytopenia, the
treatment is administration of platelets.
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Research Concepts:
Thrombocytopenia, Heparin Induced:
Choices:
1. Stroke
2. Eisenmenger syndrome
3. Cyanosis
4. Bacterial endocarditis
Answer: 1 - Stroke
Explanations:
Stroke can be seen in children less than 4 years old with congenital heart
disease (CHD)
The incidence is not increased in adults with CHD
Patients with patent ductus arteriosus and atrial septal defect can develop
left to right shunts, or Eisenmenger syndrome
This can cause pulmonary hypertension and cyanosis
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Research Concepts:
Congenital Heart Disease:
Choices:
1. Surgery infections are usually caused by a single group of bacteria
2. Surgery infections often have a source of contamination
3. Surgery infections are most commonly caused by anaerobes only
4. Surgery infections are less harmful
Answer: 2 - Surgery infections often have a source of contamination
Explanations:
Many surgical infections can be eliminated if the source can be identified
and treated.
Many surgical infections are polymicrobial and can be serious.
Surgical site infections can be due to anaerobes, especially when bowel
surgery is performed, but the infections are often polymicrobial.
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Research Concepts:
Infection:
Choices:
1. Listeria
2. Pseudomonas aeruginosa
3. E. coli
4. Mycoplasma
Answer: 2 - Pseudomonas aeruginosa
Explanations:
Pseudomonas aeruginosa and Streptococcus pneumonia are the most
common pathogens for hospital-acquired pneumonia.
Treatment involves a macrolide plus a third-generation cephalosporin.
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Research Concepts:
Hospital Acquired Pneumonia:
Choices:
1. Diastolic thrill is often palpable
2. Loud S1
3. Loudness or murmur correlates with severity
4. Opening snap
Answer: 3 - Loudness or murmur correlates with severity
Explanations:
Cardiac exam in a patient with mitral stenosis will reveal a palpable
diastolic thrill and an opening snap.
The intensity of the murmur bears no correlation to severity. However, the
duration is a guide to the severity of the condition.
Most patients have a loud S1.
There is a characteristic diastolic low-pitched rumbling murmur.
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Research Concepts:
Mitral Stenosis:
Choices:
1. CABG benefit was more robust in those on sulfonylureas
2. PTCA benefit was more robust in those on insulin
3. No difference in survival when CABG compared to PTCA
4. CABG is associated with better long-term survival than PTCA
Answer: 4 - CABG is associated with better long-term survival than PTCA
Explanations:
Amongst diabetics, CABG was associated with better long-term survival
than PTCA
CABG benefit was more robust among diabetics requiring insulin
5-year all cause mortality rate was 34.5% for those diabetics randomized to
PTCA vs. 19.4% for those randomized to CABG
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Research Concepts:
Diabetes Mellitus:
Choices:
1. Tricuspid stenosis
2. Right ventricular hypertrophy
3. Narrowing of aorta
4. Aortic stenosis
Answer: 2 - Right ventricular hypertrophy
Explanations:
Primary pulmonary hypertension carries an unknown etiology.
It is associated with right ventricular hypertrophy.
The mean survival is less than four years from the time of diagnosis.
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Research Concepts:
Pulmonary Hypertension:
Choices:
1. It increases RBC production
2. It decreases RBC production
3. It stops RBC production
4. It has no effect on RBC production
Answer: 1 - It increases RBC production
Explanations:
Erythropoietin stimulates the bone marrow to increase RBC production.
Natural erythropoietin is a hormone that is made primarily in the kidney.
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Research Concepts:
Erythropoietin:
Choices:
1. Patent ductus arteriosus
2. Atrial septal defect
3. Tetralogy of fallot
4. Coarctation of the aorta
Answer: 4 - Coarctation of the aorta
Explanations:
Bicuspid aortic valve is often seen in patients with other left sided
obstructive lesions.
Bicuspid aortic valve is commonly seen in patients with coarctation of aorta
and interrupted aortic arch.
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Research Concepts:
Aortic Coarctation:
Aortic Valve:
Choices:
1. Rheumatoid arthritis
2. System lupus erythematosus
3. Polyarteritis nodosa
4. Myasthenia gravis
Answer: 2 - System lupus erythematosus
Explanations:
Libman-Sacks endocarditis is a nonbacterial vegetative endocarditis
associated with SLE, affects any valve (often mitral), can cause cerebral
emboli
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Research Concepts:
Libman-Sacks Endocarditis:
Choices:
1. 1/16
2. 1/2
3. 1/8
4. ¼
Answer: 1 - 1/16
Explanations:
Flow is inversely proportional to resistance
R = resistance, v = viscosity, L = length, and r = radius
The variable in question is the radius. As radius is to the 4th power the
reduction of the radius by ½ results in1/16th of the flow
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Research Concepts:
Coronary Artery Disease:
Choices:
1. There is no difference in death at 3 years between the two groups
2. There is an increased incidence of angina with the PTCA group up to 1 year
3. With the repeated use of angioplasty in the PTCA group, patients remain
more re-vascularized compared to CABG patients at the end of 3 years
4. CABG patients rarely require intervention for up to 10 years if the
mammary is used.
Answer: 3 - With the repeated use of angioplasty in the PTCA group,
patients remain more re-vascularized compared to CABG patients at the end of 3
years
Explanations:
Despite the use of repeat procedures in the angioplasty group, the surgery
patients remain more completely re-vascularized at the end of 3 years.
For patients with single vessel disease, both medical therapy and
angioplasty have comparable results to surgery.
For patients with simple forms of two vessel disease, improvement occurs
with angioplasty and surgery rather than medical therapy.
For those with more complex disease, surgery out-performed both medical
therapy and angioplasty treatment.
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Research Concepts:
Revascularization Procedures In Coronary Artery
Disease:
Choices:
1. Coronary artery disease
2. Coronary artery fistula
3. Coronary artery aneurysms
4. Cardiomyopathy
Answer: 3 - Coronary artery aneurysms
Explanations:
Kawasaki disease affects children under the age of 5
It is a multisystem disorder and the acute illness presents with fever,
cervical lymphadenopathy, vasculitis and mucocutaneous changes
In its advanced stage, it is characterized by coronary artery aneurysms
Thrombotic occlusion may develop and cause myocardial ischemia. Death
can be caused by rupture of the coronary artery aneurysm
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Research Concepts:
Kawasaki Disease:
Kawasaki Disease:
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Research Concepts:
Aortic Regurgitation:
Choices:
1. Drug toxicity
2. Hyponatremia
3. Hypovolemia
4. Hypokalemia
Answer: 4 - Hypokalemia
Explanations:
The patient's symptoms are characteristic of hypokalemia (potassium
depletion). Hydrochlorothiazide (Ezide) is a diuretic (thiazide) that
increases excretion of water and sodium by preventing sodium reabsorption
in the distal tubules. In addition, excretion of chloride, bicarbonate,
magnesium, and potassium takes place.
The loss of too much potassium results in hypokalemia and should be
treated. Symptoms of hypokalemia include anorexia, muscle cramps,
numbness and tingling of lower extremities, confusion, and coma.
Hypotension and tachycardia would suggest drug toxicity. Major symptoms
of hyponatremia (sodium depletion) include anxiety, drowsiness and stupor,
muscle weakness, convulsions, oliguria, and anuria.
Major symptoms of hypovolemia (abnormally decreased volume of
circulating fluid) include oliguria, hypotension, and dry skin. Patient Need:
Physiological Integrity
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Research Concepts:
Hypokalemia:
Thiazide Diuretics:
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Question 1272: A 72 year old female complains of a chronic dry cough of
6 months duration. She has a history of ischemic cardiomyopathy on
simvastatin, aspirin, lisinopril, furosemide, and metoprolol. She denies nasal
symptoms, reflux symptoms, fever, chills, or weight loss. Exam shows normal
ENT, cardiovascular, pulmonary, and abdominal exams. Chest x-ray shows
cardiomegaly but no other abnormalities. Select the most appropriate next step.
Choices:
1. Pulmonary function tests
2. CT of the sinuses
3. Change lisinopril to candesartan
4. Treat with azithromycin
Answer: 3 - Change lisinopril to candesartan
Explanations:
The patient may have an ACE inhibitor induced cough that occurs in 5 to
20% of patients.
Substitution of an angiotensin receptor blocker is the best option.
The patient has no evidence of other explanations for cough such as post
nasal drip, congestive heart failure, or gastroesophageal reflux.
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Research Concepts:
Angiotensin Converting Enzyme Inhibitors (ACEI):
Cough:
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Research Concepts:
Angina, Unstable:
Angina, Stable:
Beta-Blockers:
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Question 1274: A man with mitral regurgitation and stenosis that was first
diagnosed over 30 years ago most likely suffered from which of the following
illnesses as a child?
Choices:
1. Rheumatic fever
2. Scarlet fever
3. Polio
4. Smallpox
Answer: 1 - Rheumatic fever
Explanations:
Most patients with mitral stenosis have a history of rheumatic fever
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Research Concepts:
Rheumatic Heart Disease:
Mitral Stenosis:
Mitral Regurgitation:
Choices:
1. Diet
2. Dental care
3. Medications
4. Keeping appointments
Answer: 3 - Medications
Explanations:
Postoperatively, all patients with mechanical valves and some patients with
bioprostheses need indefinite anticoagulant therapy
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Research Concepts:
Mitral Valve Replacement:
Choices:
1. Insert Foley catheter
2. Restrict fluids
3. Start steroids
4. Give fluids and mannitol
Answer: 4 - Give fluids and mannitol
Explanations:
Anytime hemolytic reaction from transfusion is suspected, the transfusion
should be immediately stopped. A saline infusion should be started
immediately followed by a diuretic, such as mannitol.
Low dose dopamine may improve renal blood flow. If there is evidence of
anaphylaxis, administer epinephrine, diphenhydramine, and corticosteroids.
If there is suspected acute lung injury, the patient may require endotracheal
intubation with positive pressure ventilation.
Massive blood transfusions can often cause hypothermia, hypocalcemia,
and hyperkalemia.
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Research Concepts:
Hemolytic Transfusion Reaction:
Choices:
1. Eisenmenger
2. Eisinga
3. Eisenhower
4. Munchausen
Answer: 1 - Eisenmenger
Explanations:
A number of congenital cardiac defects can result in this syndrome.
Examples are ASD, VSD, and Teratology of Fallot.
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Research Concepts:
Eisenmenger Syndrome:
Explanations:
Usually patients prefer to sit up and lean forward for comfort
If tamponade is present, pericardiocentesis or pericardiotomy is an
emergency procedure
If the effusion is small, or occurs very slowly over time, pericardiocentesis
may not be necessary
Rapidly occurring effusion of 150 ml may decrease cardiac output; slow
increase in accumulation may tolerate 2 L without effect
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Research Concepts:
Pericardial Effusion:
Choices:
1. Down syndrome
2. Turner syndrome
3. Cretinism
4. Klinefelter syndrome
Answer: 2 - Turner syndrome
Explanations:
Turner syndrome has a 45,X karyotype, and occurs in females.
Individuals are usually infertile secondary to streak ovaries and are also
short in stature.
Other features include a webbed neck, lymphedema of the extremities,
skeletal abnormalities, renal disease, and congenital heart defects.
Individuals can also have hypothyroidism, diabetes mellitus, autoimmune
diseases, and specific cognitive deficits.
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Research Concepts:
Turner Syndrome:
Choices:
1. Clopidogrel
2. Warfarin
3. Aspirin
4. Statins
Answer: 2 - Warfarin
Explanations:
Warfarin is proven to prevent cardioembolic strokes not atherothrombotic
Risk factors for atherosclerosis and therefore stroke are hypertension,
hyperlipidemia, smoking, diabetes, age, and family history
Antiplatelet therapy reduces the risk of nonfatal stroke by 25 to 30%
Statins reduce the risk of stroke, even in patients without hyperlipidemia
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Research Concepts:
Warfarin:
Stroke Prevention:
Choices:
1. Medial
2. Distal
3. Fluid
4. Proximal
Answer: 2 - Distal
Explanations:
A mixed venous sample is drawn from the distal (pulmonary artery) port of
a Swan-Ganz catheter.
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Research Concepts:
Pulmonary Artery Catheterization:
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Research Concepts:
Mitral Valve Prolapse:
Choices:
1. Procainamide
2. Beta blockers
3. Calcium channel blockers
4. SSRIs
Answer: 4 - SSRIs
Explanations:
Other causes of AV block include Chagas disease, myotonic dystrophy,
calcium channel blockers, beta-blockers, quinidine, Lenegre disease, Lev
disease, rheumatic fever, myocarditis, and Aspergillus myocarditis.
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Research Concepts:
Atrioventricular Block, Third-Degree:
Choices:
1. Striae
2. Muscle atrophy
3. Psychosis
4. Salt wasting
Answer: 4 - Salt wasting
Explanations:
Predictable adverse effects include adrenal suppression, growth inhibition,
muscle wasting, osteoporosis, salt retention, diabetes, and psychosis.
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Research Concepts:
Corticosteroids:
Choices:
1. Malignancy
2. Infection
3. Myocardial damage
4. Hemolytic anemia
Answer: 3 - Myocardial damage
Explanations:
Myoglobin is generally detected about 1 hour after a heart attack is
experienced.
It peaks within 4 to 6 hours after infarction.
It is nonspecific so it is rarely used as a cardiac marker.
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Research Concepts:
Myoglobin:
Choices:
1. Metoprolol
2. Digoxin
3. Lisinopril
4. Captopril
Answer: 2 - Digoxin
Explanations:
Digoxin is commonly used in congestive heart failure for its inotropic effect
But it has not been documented to increase long term survival in patients
with CHF
Beta blockers are well documented in increasing long term survival of
patients
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Research Concepts:
Heart Failure, Congestive:
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Research Concepts:
Crystalloid Fluids:
Explanations:
Prehypertension is a relatively new classification.
Prehypertension is SBP between 120-139 and DBP 80-89.
Readings above or equal to 140/90 are considered hypertension.
Normal blood pressure is 120/80 or less.
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Research Concepts:
Prehypertension:
Choices:
1. Increase dose of statin
2. No recommendation needed
3. Addition of niacin
4. Addition of metformin
Answer: 3 - Addition of niacin
Explanations:
Addition of niacin should help increase HDL levels in this patient to the
goal of >40 mg/dL
Atorvastatin is already at maximum dose of 80 mg/day
LDL is at goal of <100 mg/dL for patient with heart disease
Total cholesterol is also at goal of <200 mg/dL
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Research Concepts:
Hyperlipidemia:
Choices:
1. Hydralazine
2. Verapamil
3. Nitroprusside
4. Prazosin
Answer: 3 - Nitroprusside
Explanations:
Thiocyanate can accumulate in nitroprusside therapy and cause poisoning
Verapamil can cause constipation
Prazosin can cause orthostatic hypotension
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Research Concepts:
Sodium Nitroprusside:
Cyanide Toxicity:
Choices:
1. Calcification
2. Thrombosis
3. Degeneration
4. Valve loosening
Answer: 3 - Degeneration
Explanations:
The major limitation of tissue valves is that they do not last very long.
By the sixth year, there is evidence of degeneration.
By the tenth year, at least 30% of valves may require replacement.
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Research Concepts:
Mitral Stenosis:
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Research Concepts:
Innocent Murmur:
Choices:
1. Theophylline
2. Diltiazem
3. Digoxin
4. Warfarin
Answer: 3 - Digoxin
Explanations:
The use of digoxin in patients with cor pulmonale is not well accepted.
Unlike left heart failure, the benefits of digoxin in right ventricular
dysfunction are inconsistent.
Increasing evidence shows that in the presence of hypoxia and acidosis,
digoxin may potentiate arrhythmias.
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Research Concepts:
Cor Pulmonale:
Choices:
1. Low LDH
2. High RBC
3. Low protein
4. High serum to pleural LDH ratio
Answer: 2 - High RBC
Explanations:
Transudate effusion is presented in congestive heart failure
This pleural effusion has low LDH and protein levels
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Research Concepts:
Effusion, Pleural:
Transudate:
Choices:
1. Diuretics
2. IV fluids
3. Surgery
4. Beta blockers
Answer: 3 - Surgery
Explanations:
VSD need to be surgically repaired if caused my acute MI
This is urgent
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Research Concepts:
Postinfarct Ventricular Septal Rupture:
Choices:
1. Spironolactone
2. Hydrochlorothiazide (HCTZ)
3. Amiloride
4. Captopril
Answer: 2 - Hydrochlorothiazide (HCTZ)
Explanations:
Hydrochlorothiazide (HCTZ) is a potent diuretic associated with
hypokalemia.
Potassium supplements are usually given as concomitant therapy.
k
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Research Concepts:
Thiazide Diuretics:
Choices:
1. Lisinopril
2. Thiazide
3. Aspirin
4. Verapamil
Answer: 4 - Verapamil
Explanations:
Congestive heart failure can be caused by medications that are negatively
inotropic, such as calcium channel blockers and beta blockers.
Despite this, beta blockers have been shown to be beneficial in these
patients but not calcium channel blockers.
Beta blockers reduce mortality and prevent deleterious remodeling.
It can also be triggered by medications that cause fluid retention, such as
NSAIDS.
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Research Concepts:
Heart Failure, Congestive:
Choices:
1. Right ventricular
2. Pulmonary wedge
3. Left ventricle
4. Left atrial
Answer: 1 - Right ventricular
Explanations:
Right ventricular pressure will likely increase with pulmonary
vasoconstriction.
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Research Concepts:
Pulmonary Vasoconstriction:
Choices:
1. Hemoptysis
2. Tachycardia
3. Vomiting
4. Chest pain
Answer: 3 - Vomiting
Explanations:
The most common findings are tachypnea, tachycardia, rales, fourth heart
sound E2. The most common symptoms are dyspnea, pleuritic chest pain,
cough and hemoptysis
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Research Concepts:
Pulmonary Embolism:
Choices:
1. CT scan of the chest
2. Echocardiogram
3. Flexible bronchoscopy
4. Angiogram
Answer: 2 - Echocardiogram
Explanations:
Massive hemoptysis may be due to other causes, besides the lung.
If the chest x-ray is normal then one should suspect a cardiac cause.
An echocardiogram may reveal the presence of a valvular heart disorder,
congestive heart failure, or a cardiomyopathy.
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Research Concepts:
Hemoptysis:
Explanations:
Mean arterial pressure is the perfusion pressure seen by the end organs of
the body.
A mean arterial pressure of 60 mm Hg or greater is adequate to sustain
viability of most organs in the body.
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Research Concepts:
Mean Arterial Pressure:
Choices:
1. Atropine
2. Atenolol
3. Epinephrine
4. Lidocaine
Answer: 2 - Atenolol
Explanations:
Atropine, epinephrine and lidocaine can be administered via ET tube
Naloxone and diazepam can also be administered via ET tube
Atenolol cannot be administered via ET tube
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Research Concepts:
Endotracheal Medications:
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Research Concepts:
Pericardial Effusion:
Chylothorax:
Choices:
1. Scheduled for pace maker insertion
2. No treatment at this time
3. Intravenous Cardizem
4. Prescription for Rythmol SR
Answer: 2 - No treatment at this time
Explanations:
Asymptomatic 1st degree heart block does not indicate a need for specific
treatment options
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Research Concepts:
Heart Block, First Degree:
Choices:
1. Peripheral intravenous line placement
2. Femoral central line placement
3. Antecubital venous blood draw
4. Brain CT scan
Answer: 2 - Femoral central line placement
Explanations:
Placement of central lines or arterial lines, lumbar punctures, intramuscular
injections, and any surgical procedures should be avoided in patients with
hemophilia (severe factor VIII or IX deficiency) until after factor
replacement therapy has been given
Peripheral venipuncture can be done, although repeated traumatic efforts
should be avoided
Hemophilia patients who have suffered head trauma should receive factor
replacement therapy before any brain imaging is performed, as any
intracranial hemorrhage that has occurred will continue bleeding until
factor replacement is given
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Research Concepts:
Central Line Placement:
Hemophilia B:
Choices:
1. Atrial septal defect
2. Ventricular septal defect
3. Mitral valve prolapse
4. Hypoplastic left heart syndrome
Answer: 4 - Hypoplastic left heart syndrome
Explanations:
Congenital heart disease may present as cardiogenic shock
Causes of neonatal cardiogenic shock include critical aortic stenosis,
hypoplastic left heart syndrome, and coarctation of the aorta
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Research Concepts:
Hypoplastic Left Heart Syndrome:
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Research Concepts:
Fentanyl:
Choices:
1. Young
2. Hypertensive
3. Older
4. Elevated ICP
Answer: 2 - Hypertensive
Explanations:
Sedation is not highly recommended for young, older, and head injury.
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Research Concepts:
Preoperative Evaluation And Management:
Choices:
1. Trauma
2. Renal failure
3. Anemia
4. Elevated lipids
Answer: 4 - Elevated lipids
Explanations:
Xanthelasma are sharply demarcated collections of cholesterol deposits
underneath the skin, usually around the eye.
Xanthelasma are common in Asian and Mediterranean people.
In some people, they are an indication of hypercholesterolemia.
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Research Concepts:
Xanthelasma:
Choices:
1. Criminal
2. Intentional tort
3. Negligence
4. Assault
Answer: 3 - Negligence
Explanations:
Negligence, a malpractice claim may be filed under tort law (unintentional
tort)
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Research Concepts:
Negligence:
Choices:
1. Helicase
2. Topoisomerase
3. DNA ligase
4. DNA polymerase
Answer: 2 - Topoisomerase
Explanations:
The quinolone antibiotics inhibit prokaryotic topoisomerase known as DNA
gyrase.
Helicase, DNA ligase and DNA polymerase are enzymes involved DNA
synthesis but not in supercoiling.
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Research Concepts:
Quinolones:
Topoisomerase ll:
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Research Concepts:
Aortic Stenosis:
Choices:
1. Atropine
2. Synchronized cardioversion
3. Adenosine
4. Labetalol
Answer: 3 - Adenosine
Explanations:
Adenosine can provide short-term relief of PSVT if vagal maneuvers fail to
terminate the rhythm
Calcium channel blockers can also be used for PSVT refractory to vagal
maneuvers
Synchronized cardioversion is reserved for those with unstable PSVT
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Research Concepts:
Paroxysmal Supraventricular Tachycardia:
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Research Concepts:
Superior Vena Cava Syndrome:
Choices:
1. Clearly document that he is a Jehovah's Witness in his medical record
2. Encourage him to agree to accept blood
3. Refuse to accept him as a patient
4. Plan to administer blood only if an emergency situation arises
Answer: 1 - Clearly document that he is a Jehovah's Witness in his medical
record
Explanations:
Knowing that a patient is a Jehovah's Witness has major potential
implications for his care, so it must be clearly documented.
There should be a frank discussion with Jehovah's Witness patients about
their beliefs regarding blood products and the various options that are
available.
Blood should not be administered in an emergency situation unless the
patient agrees.
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Research Concepts:
Jehovah's Witness Patients:
Choices:
1. Sequential compression devices
2. Aspirin
3. Low molecular weight heparin
4. Warfarin
Answer: 3 - Low molecular weight heparin
Explanations:
Low molecular weight heparin has been shown to be effective in DVT
prevention.
Coumadin has more side effects and has a higher risk of intracranial
bleeding.
SCDs and aspirin alone are not sufficient for DVT prevention.
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Research Concepts:
Deep Venous Thrombosis Prophylaxis:
Choices:
1. Polycythemia
2. Brain abscess
3. Cerebral neoplasms
4. Stroke
Answer: 3 - Cerebral neoplasms
Explanations:
Chronic cyanosis may be complicated by polycythemia and stroke, as well
as other complications resulting from increased blood viscosity
Brain abscesses may form due to poor venous blood flow causing increased
susceptibility to infection
Impaired cognitive function may also result
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Research Concepts:
Cyanosis:
Choices:
1. Heimlich maneuver
2. Bretylium
3. Valsalva maneuver
4. Mexiletine
Answer: 3 - Valsalva maneuver
Explanations:
The Valsalva maneuver stimulates the vagus nerve to slow the heart rate
It is one of the vagal maneuvers
Another vagal maneuver is the carotid massage
The carotid massage should be used with caution in older patients, as they
have increased risk of embolism
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Research Concepts:
Valsalva Maneuver:
Choices:
1. pH
2. PCO2
3. PO2
4. HCO3
Answer: 4 - HCO3
Explanations:
If the ABG sample is not immediately analyzed or placed on ice, the PO2
level will decrease, the PCO2 level will be falsely elevated, pH level drops,
and HCO3 is not affected.
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Research Concepts:
Arterial Blood Gas:
Choices:
1. Class 1
2. Class 2
3. Class 3
4. Class 4
Answer: 3 - Class 3
Explanations:
NYHA class 1 is no limitation of physical activity.
NYHA class 2 is slight limitation of physical activity. Ordinary activity
does not cause symptoms.
NYHA class 3 is moderate limitation of activity but patient is comfortable
at rest.
NYHA class 4 is inability to perform any exercise and there may be
symptoms at rest.
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Research Concepts:
Coronary Artery Disease:
Choices:
1. Echocardiogram
2. X-ray
3. CT
4. ECG
Answer: 2 - X-ray
Explanations:
A two view CXR may confirm the correct position of the dual leads
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Research Concepts:
Dual Chamber Pacemaker:
Choices:
1. Hypertension
2. Fever
3. Cardiac arrhythmia
4. Nausea
Answer: 3 - Cardiac arrhythmia
Explanations:
Cardiac arrhythmias may occur during the reperfusion period
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Research Concepts:
Thrombolytic Therapy:
Arrhythmia:
Choices:
1. Pericardial tamponade
2. Pulmonary hypertension
3. Pneumothorax
4. Pulmonary fibrosis
Answer: 3 - Pneumothorax
Explanations:
Pneumothorax is associated with decreased chest movement and breath
sounds on the ipsilateral side.
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Research Concepts:
Pneumothorax:
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Research Concepts:
Coronary Artery Anatomy:
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Research Concepts:
Dissection, Aortic:
Choices:
1. Malpractice
2. Abandonment
3. Recruitment
4. None of the above
Answer: 2 - Abandonment
Explanations:
Abandonment is the term for a healthcare worker terminating treatment
inappropriately
Turning care over to less qualified personnel can also be considered
abandonment
Malpractice refers to a breach of a standard of care
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Research Concepts:
Abandonment:
Choices:
1. Fresh frozen plasma
2. Vitamin K
3. Aminocaproic acid
4. Protamine
Answer: 3 - Aminocaproic acid
Explanations:
Aminocaproic acid is a derivative of lysine and an inhibitor of certain
proteolytic enzymes.
Aminocaproic acid is used to treat excessive fibrinolysis that may result
from an overdose of streptokinase.
Side effects of aminocaproic acid include nausea, fever, and vomiting.
Aminocaproic acid can also cause inflammation of the liver and appendix.
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Research Concepts:
Thrombolytic Therapy:
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Research Concepts:
Abuse:
Choices:
1. ST-segment elevation
2. Younger age
3. Prior use of aspirin
4. Negative family history of CAD
Answer: 3 - Prior use of aspirin
Explanations:
Analysis of TIMI IIIB database revealed predictors of patients who fail
medical therapy
Independent predictors of a clinical event or abnormal ETT include ST-
segment depression on qualifying ECG, history of prior angina, family
history of premature CAD, prior use of ASA or heparin, and increasing age
Patients with these characteristics could benefit from expeditious invasive
therapy
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Research Concepts:
Treadmill Stress Testing:
Choices:
1. Chest radiograph
2. V/Q scan
3. CT angiography
4. MRI
Answer: 3 - CT angiography
Explanations:
CT angiography is the best imaging modality for stable patients with
suspected PE.
If the CT angiogram is normal, then the likelihood of a PE is very small.
CT pulmonary angiography can visualize lobar, segmental, and main
pulmonary emboli with relative ease.
V/Q scintigraphy is available for those with contrast reaction history.
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Pulmonary Embolism:
Choices:
1. pH=7.35, PO2=40 mmHg, PCO2=34 mmHg, and bicarbonate= 10 mEq/L
2. pH=7.19, PO2=45 mmHg, PCO2=68 mmHg, and bicarbonate= 3 mEq/L
3. pH=7.60, PO2=95 mmHg, PCO2=20 mmHg, and bicarbonate= 2 mEq/L
4. pH=7.21, PO2=96 mmHg, PCO2=27 mmHg, and bicarbonate=15 mEq/L
Answer: 2 - pH=7.19, PO2=45 mmHg, PCO2=68 mmHg, and bicarbonate=
3 mEq/L
Explanations:
The ABG in the second option shows hypoxia, CO2 retention, and
respiratory acidosis
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Research Concepts:
Tension Pneumothorax:
Choices:
1. Ischemia
2. Hyperkalemia
3. Hypermagnesemia
4. Acidosis
Answer: 2 - Hyperkalemia
Explanations:
T waves on ECG represent ventricular repolarization process
Hyperkalemia is a common complication of end stage renal disease
ECG shows peaked T waves in chest leads
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Research Concepts:
End Stage Renal Disease:
Hyperkalemia:
ECG, T Wave:
Choices:
1. Atropine 0.5 mg IV
2. Transcutaneous pacing
3. Adenosine
4. Morphine, Aspirin, Metoprolol
Answer: 2 - Transcutaneous pacing
Explanations:
In patients with symptomatic bradycardia with type II second degree or
third degree heart block, transcutaneous pacing is indicated without delay
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Research Concepts:
Heart Block, Third Degree:
Choices:
1. Switch simvastatin to atorvastatin
2. Start fenofibrate
3. Add extended release niacin
4. Add ezetimibe
Answer: 3 - Add extended release niacin
Explanations:
The patient's LDL is adequately treated
Adding ezetimibe is unlikely to lower the triglycerides enough and the
addition of fenofibrate has not been shown to lower mortality
Niacin may lower triglycerides but may worsen diabetic control. Another
option is omega 3 fish oils
Fenofibrate will lower triglycerides but the patient should be watched for
myopathy
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Research Concepts:
Hyperlipidemia:
Choices:
1. Pulmonary hypertension
2. Clubbing
3. Endocarditis
4. Aortic regurgitation
Answer: 2 - Clubbing
Explanations:
Lovibond angle is the angle between the nail plate base and the adjacent
skin
This angle is usually less than 165 degrees
If the angle is more, it is a sign of clubbing
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Research Concepts:
Congenital Heart Disease:
Nails, Clubbing:
Choices:
1. Beta blockers
2. ACEI
3. Calcium channel blockers
4. Vasodilators
Answer: 3 - Calcium channel blockers
Explanations:
Calcium channel blockers can cause salt and water retention, constipation
and facial flushing
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Research Concepts:
Calcium Channel blockers:
Choices:
1. Superior thyroid artery aneurysm
2. Tracheo-innominate artery fistula
3. Aneurysm of aortic arch
4. Thyroid malignancy
Answer: 3 - Aneurysm of aortic arch
Explanations:
Cardarelli sign is an abnormal pulsation of the trachea and may be found in
patients with aneurysms of the aortic arch.
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Research Concepts:
Thoracic Aortic Aneurysm:
Choices:
1. A patient with a previous coronary bypass graft 2 years earlier should
undergo cardiac stress testing before clearance, regardless of the presence
of cardiac symptoms
2. Urine pregnancy testing should be done for women of childbearing age
3. Coagulation studies should be included in the laboratory assessment of all
surgical candidates
4. Patients who have had angioplasty within 6 months are not required to have
further cardiology assessment
Answer: 2 - Urine pregnancy testing should be done for women of
childbearing age
Explanations:
The most important preoperative evaluation is the history. It was
commonplace to do extensive labs, radiographs, and cardiac evolutions in
the past.
Many of these investigations have been found to have no effect on
outcomes.
The most important test is a urine pregnancy test, as all women of
childbearing years should be considered pregnant until proven otherwise.
Many patients deny sexual activity but turn out to be pregnant.
Other specific tests should be guided by patient history, age, and facility
requirements.
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Research Concepts:
Preoperative Testing:
Choices:
1. Administer heparin
2. Drain abscess
3. Explore patient
4. Change antibiotics
Answer: 2 - Drain abscess
Explanations:
The only definitive treatment for disseminated intravascular coagulation is
treatment of the underlying cause.
In the above patient, the risk from surgery is very high in the presence of
disseminated intravascular coagulation. Thus, the abscess should be drained
percutaneously with the help of a CT scan.
One may attempt to give platelets and fresh frozen plasma when there is
active bleeding, but these are only temporizing factors.
Disseminated intravascular coagulation results in low fibrinogen levels and
elevated levels of fibrin degradation products.
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Research Concepts:
Disseminated Intravascular Coagulation:
Abscess:
Choices:
1. Poor surgical technique
2. Infection
3. Platelet dysfunction
4. Renal failure
Answer: 1 - Poor surgical technique
Explanations:
In an elective case, the most common cause of postoperative bleeding is
poor surgical technique. This may include failure to tie down blood vessels
or failure to cauterize bleeders.
If the bleeding is severe, one should always check coagulation parameters
and obtain a family history of bleeding.
Patients who continue to bleed with a normal international normalized ratio
and normal partial thromboplastin time may have impaired platelet activity.
If the activated partial thromboplastin time is prolonged and the
international normalized ratio is normal, the most likely cause is heparin.
This can be treated with protamine or fresh frozen plasma.
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Research Concepts:
Postoperative Complications:
Choices:
1. Adenosine
2. Vasopressin
3. Epinephrine
4. Phenylephrine
Answer: 2 - Vasopressin
Explanations:
Vasopressin is the agent of choice for refractory ventricular fibrillation.
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Research Concepts:
Ventricular Fibrillation:
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Research Concepts:
Thoracic Anatomy:
Choices:
1. Good exercise for the patient
2. Takes their mind off of their medical condition
3. Prevents deep vein thrombosis of the legs
4. Prevents bed sores
Answer: 3 - Prevents deep vein thrombosis of the legs
Explanations:
This activity is taught to the patient to promote venous return.
The muscular action aids in venous return and prevents venous stasis in the
lower extremities.
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Research Concepts:
Deep Venous Thrombosis Prophylaxis:
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Research Concepts:
Pulmonary Hypertension:
Heart-Lung Transplantation:
Choices:
1. Minocycline
2. Bacitracin
3. Amikacin
4. Cefotetan
Answer: 1 - Minocycline
Explanations:
Intravenous vancomycin is the drug of choice for MRSA.
There are sporadic cases of vancomycin-resistant MRSA.
Linezolid is an effective alternative but resistance has been seen.
Daptomycin can be used in adults and is another option.
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Research Concepts:
MRSA Infection:
Choices:
1. IV gentamicin
2. IV ceftriaxone
3. IV sulfonamide
4. IV clindamycin
Answer: 4 - IV clindamycin
Explanations:
Aspiration alone is not an indication for antibiotics.
If pneumonitis persists 48 hours, antibiotics should be started. In order to
cover anaerobic bacteria in aspiration pneumonia, clindamycin is used.
Often this is combined with another antibiotic, commonly a third generation
cephalosporin.
Routine use of corticosteroids has not been shown to improve survival.
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Research Concepts:
Pneumonia, Aspiration:
Choices:
1. Angiotensin I
2. Angiotensin II
3. Bradykinin
4. Angiotensinogen
Answer: 3 - Bradykinin
Explanations:
Bradykinin is metabolized by ACE.
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Research Concepts:
Angiotensin Converting Enzyme Inhibitors (ACEI):
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Beta-Blockers:
Choices:
1. 1.5 times greater
2. 2 times greater
3. 2.5 times greater
4. 3 times greater
Answer: 2 - 2 times greater
Explanations:
The mortality rate of diabetic MI is twice of a nondiabetic patient
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Research Concepts:
Diabetes Mellitus:
Choices:
1. Prior myocardial infarction
2. High LDL-C
3. Low ejection fraction
4. High HDL-C
Answer: 4 - High HDL-C
Explanations:
There are 12 independent prognostic factors for atherosclerosis progression
in saphenous vein grafts.
These include years post-SVG placement, maximum stenosis of the graft at
baseline angiography, small minimum graft diameter, prior myocardial
infarction, the moderate LDL-C lowering strategy, hypertriglyceridemia,
low HDL-C, high LDL-C, low ejection fraction, high mean arterial
pressure, male, and current smoking.
High HDL-C is a good prognostic indicator.
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Research Concepts:
Saphenous Vein Grafts:
Atherosclerosis:
Choices:
1. Computed tomography (CT)
2. Magnetic resonance imaging (MRI)
3. X-ray
4. Ultrasound (U/S)
Answer: 4 - Ultrasound (U/S)
Explanations:
Ultrasound is the standard imaging tool for AAAs
Surgery is the treatment of choice for AAAs
The US Preventative Services Task Force recommends U/S screening for
men aged 65-75 years who have ever had a history of smoking
AAAs predominantly affect elderly white men
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Abdominal Aortic Aneurysm:
Choices:
1. Naloxone
2. Meperidine
3. Methanol
4. Nalbuphine
Answer: 4 - Nalbuphine
Explanations:
Nalbuphine is an opioid with mixed agonist antagonist-analgesic properties
Nalbuphine activates kappa and weakly blocks mu receptors
Nalbuphine is an effective analgesic, but with lower abuse potential and
less respiratory depressant effects
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Research Concepts:
Nalbuphine:
Choices:
1. Cancer
2. Heart disease
3. Suicide
4. Stroke
Answer: 2 - Heart disease
Explanations:
In order, the leading causes of death in the elderly in the US are heart
disease, cancer, cerebrovascular disease, chronic lower respiratory diseases,
and Alzheimer's disease
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Research Concepts:
Death Statistics:
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Research Concepts:
Heart Failure, Congestive:
Choices:
1. Chest x-ray
2. Room air ABG
3. Hyperoxia test
4. ECG
Answer: 3 - Hyperoxia test
Explanations:
The hyperoxia test is most likely to differentiate cyanotic heart disease from
pulmonary disease
The pO2 is measured during the administration of 100% oxygen
With lung disease there is usually some change from the baseline pO2
With cyanotic heart disease, due to fixed right-to-left shunting, the pO2
rarely increases above 100 mm Hg
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Cyanosis:
Choices:
1. Extrinsic pathway
2. Intrinsic pathway
3. Von Willebrand factor
4. Platelet aggravation
Answer: 1 - Extrinsic pathway
Explanations:
The extrinsic pathway is the only clotting test that requires the addition of
tissue thromboplastin.
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Research Concepts:
Coagulation Pathways:
Choices:
1. A systolic murmur
2. A diastolic murmur
3. S3 heart sound
4. A snap in early diastole
Answer: 3 - S3 heart sound
Explanations:
An S3 heart sound is heard during mid-diastole.
A left side S3 is best heard during expiration at the left ventricular border.
A right side S3 is best heard during inspiration at the left sternal border.
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Research Concepts:
Heart Failure, Congestive:
Choices:
1. It slows the atrial rate in atrial fibrillation
2. It enhances atrioventricular conduction
3. It slows the atrial rate in sinus tachycardia
4. It slows the ventricular rate in atrial fibrillation
Answer: 4 - It slows the ventricular rate in atrial fibrillation
Explanations:
Digoxin acts at the AV node and slows the ventricular response rate in atrial
fibrillation.
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Research Concepts:
Atrial Fibrillation:
Digoxin:
Choices:
1. Moistening the dressing with sterile saline
2. Pulling the dressing off quickly
3. Placing a warm compress over the dressing
4. Finding an edge and slowly working the dressing free
Answer: 1 - Moistening the dressing with sterile saline
Explanations:
Moistening the dressing softens the adhesion and aids in removal, thus
preventing damage to the incision and the surrounding tissue.
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Research Concepts:
Wound Care:
Choices:
1. Heparin, thrombocytopenia, and aspirin
2. Warfarin, thrombocytopenia, and hemophilia A
3. Heparin, hemophilia A, and von Willebrand factor deficiency
4. Warfarin, aspirin, and von Willebrand factor deficiency
Answer: 3 - Heparin, hemophilia A, and von Willebrand factor deficiency
Explanations:
aPTT detects abnormalities of both the common and intrinsic coagulation
pathways
Heparin elevates aPTT by binding to antithrombin III, causing its
activation, and inactivating thrombin and factor Xa
Von Willebrand factor deficiency binds to factor VIII preventing its
deactivation
Hemophilia A is a deficiency of factor VIII
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Research Concepts:
Partial Thromboplastin Time:
Choices:
1. They have a wide spectrum of activity against many Gram-negative rods
2. They have a high ratio of therapeutic levels to toxic levels
3. They have exceptional coverage against Gram-positive organisms
4. Most are administered orally
Answer: 1 - They have a wide spectrum of activity against many Gram-
negative rods
Explanations:
Aminoglycoside antibiotics have very poor activity against anaerobic and
Gram-positive organisms.
These antibiotics are usually administered parenterally and have a very
narrow range for toxicity.
Levels of most aminoglycosides need to be monitored.
These antibiotics have good Gram-negative bacteria coverage.
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Research Concepts:
Aminoglycosides:
Antibiotics:
Choices:
1. Captopril
2. Furosemide
3. Atenolol
4. Minoxidil
Answer: 4 - Minoxidil
Explanations:
Minoxidil is an alpha antagonist and has no role in the treatment of CHF.
Minoxidil is used in the treatment of hypertension and has an odd side
effect of excess hair growth.
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Research Concepts:
Heart Failure, Congestive:
Choices:
1. Serum glucose of 115 mg/dl
2. Blood pressure (systolic) of 138 mmHg
3. Apical pulse of 42 beats per minute
4. Blood pressure (diastolic) of 72 mmHg
Answer: 3 - Apical pulse of 42 beats per minute
Explanations:
Pronestyl-SR should be withheld and the physician notified if the patient's
apical pulse is 60 bpm or less. Procainamide (Pronestyl-SR) is an anti-
arrhythmic drug used to treat both atrial and ventricular arrhythmias.
Signs of toxicity include electrocardiogram (ECG) changes, hypotension,
and bradyarrhythmias (heart rate of 60 bpm or less). The normal blood
glucose level is 60 to 115 mg /dl. Since the patient's serum glucose is 115
mg/dl, there is no reason to take any action.
A systolic blood pressure of 138 mmHg is expected in this situation. A
diastolic blood pressure of 72 mmHg is also expected in this situation.
Pregnancy Category: C Patient Need: Physiological Integrity
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Research Concepts:
Sinus Bradycardia:
Antiarrhythmic Medication:
Choices:
1. Atrial septal defect
2. Bicuspid aortic valve
3. Pulmonary valve regurgitation
4. Lower extremity hypertension
Answer: 2 - Bicuspid aortic valve
Explanations:
Coarctation of the aorta is a rare heart defect accounting for 5-8% of all
congenital heart defects.
It may occur as an isolated defect or in association with other lesions, most
commonly ventricular septal defect and bicuspid aortic valve.
Coarctation of the aorta often presents with upper extremity hypertension
and radial-femoral pulse delay.
The disorder can be surgically treated but endovascular techniques are also
being applied.
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Research Concepts:
Aortic Coarctation:
Choices:
1. Observation
2. Metoprolol
3. Nifedipine
4. Catheterization
Answer: 1 - Observation
Explanations:
CAST studies demonstrated no treatment is necessary for asymptomatic
PVC after MI
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Research Concepts:
Acute Myocardial Infarction:
Choices:
1. Prescribe inhaled corticosteroids
2. Evaluate vasoreactivity
3. Order an echocardiogram
4. Prescribe long acting calcium channel blockers
Answer: 2 - Evaluate vasoreactivity
Explanations:
Primary pulmonary hypertension, PPH, is defined as elevated pulmonary
artery pressure with no discernible cause and is most prevalent in women of
child-bearing age.
Vasoreactivity is evaluated by assessing a patient's response to an IV or
inhaled vasodilator challenge.
If the patient responds then an oral vasodilator challenge is performed, with
a catheter in the pulmonary artery to determine the dose, which causes a
20% reduction in pulmonary artery pressure.
Patients with an acute vasodilator response have a better prognosis on
calcium channel blockers only. They constitute about 20% of those with
PPH. Phosphodiesterase inhibitors are also used to treat this condition.
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Research Concepts:
Pulmonary Hypertension, Primary:
Choices:
1. Captopril
2. Metoprolol
3. Spironolactone
4. Diltiazem
Answer: 4 - Diltiazem
Explanations:
Beta-blockers are known to improve long-term survival in patients with
myocardial infraction
Propranolol and metoprolol are common beta-blockers used
Spironolactone is another drug associated with good long-term survival
Calcium channel blockers have not been noted to improve survival
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Research Concepts:
Acute Myocardial Infarction:
Choices:
1. A 70-year-old female without symptoms, ejection fraction of 45%, and left-
ventricular end-systolic dimension of 45 mm
2. A 68-year-old asymptomatic male with new atrial fibrillation, ejection
fraction of 60%, and end-systolic dimension of 40 mm
3. A 57-year-old female with an ejection fraction of 25%, NYHA class III
symptoms, and pulmonary hypertension
4. A 52-year-old man with an ejection fraction of 25%, NYHA class III
symptoms, and a left-ventricular end-systolic dimension of 60 mm
Answer: 1 - A 70-year-old female without symptoms, ejection fraction of
45%, and left-ventricular end-systolic dimension of 45 mm
Explanations:
The decision for mitral valve replacement is based on ventricular size, LV
function, and complications of chronic mitral regurgitation
Pulmonary hypertension and atrial fibrillation are such complications
Ejection fraction of <30% or end systolic dimension greater than 55 mm
can lead to incomplete recovery and reduced survival
Medical therapy is not effective so surgery should be considered if there is
greater than a 90% chance of success
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Research Concepts:
Mitral Regurgitation:
Choices:
1. Ringing in the ears
2. Changes in vision
3. Palpitations
4. Nausea and vomiting
Answer: 1 - Ringing in the ears
Explanations:
Nausea, vomiting, and changes in vision are common symptoms of acute
digoxin toxicity.
Ventricular and atrial arrhythmias may also manifest with palpitation.
Ringing in the ears is common symptom of aspirin toxicity.
Electrolyte disturbances frequently cause digoxin toxicity.
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Research Concepts:
Digoxin Toxicity:
Choices:
1. Prednisone
2. Warfarin
3. Heparin
4. Aspirin
Answer: 4 - Aspirin
Explanations:
The most potent mediators of inflammation are prostaglandins.
Prostaglandins are derived from arachidonic acid and require the enzyme
cyclooxygenase (COX).
COX is typically inhibited by non-steroidal anti-inflammatory drugs like
aspirin. The inhibition by aspirin is not reversible.
There are three subtypes of COX. COX-1 makes prostaglandins. COX-2 is
induced by mitogens, endotoxins, and cytokines, which produce
prostaglandins in inflammation. The function of COX-3 is not yet
understood.
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Research Concepts:
Antiplatelet Medications:
Choices:
1. Left ventricle
2. Right ventricle
3. Left atrium
4. Right atrium
Answer: 2 - Right ventricle
Explanations:
In TOF there is pulmonary atresia and the right ventricle is unable to pump
the blood into the pulmonary circulation.
Over time, this leads to right ventricular hypertrophy.
Echo can be used to confirm the thickness of the right ventricle.
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Research Concepts:
Tetralogy Of Fallot:
Choices:
1. Meiotic pupils
2. Shallow respiration
3. Itching
4. Seizures
Answer: 4 - Seizures
Explanations:
Morphine has many side effects but it does not cause seizures
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Research Concepts:
Morphine Overdose:
Choices:
1. Right atrium
2. Right ventricle
3. Left atrium
4. Left ventricle
Answer: 1 - Right atrium
Explanations:
A normal CVP is less than 6 mmHg
It is the a measurement of the right atrium pressure
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Research Concepts:
Cardiac Physiology:
Choices:
1. Vesicle
2. Bulla
3. Nodule
4. Wheal
Answer: 2 - Bulla
Explanations:
By definition, a bulla.
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Research Concepts:
Bulla:
Explanations:
An Austin Flint murmur, heard in aortic regurgitation, is a high pitched
diastolic blowing decrescendo murmur at the left sternal border
A mid diastolic rumble can also be heard at the cardiac apex in aortic
regurgitation
A holosystolic murmur across the precordium radiating to the axilla is a
mitral insufficiency murmur
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Research Concepts:
Aortic Regurgitation:
Choices:
1. DM has no affect on risk of MI
2. Diabetics on insulin are the only diabetic subgroup at risk for MI
3. Risk of MI is elevated by DM, but DM has no affect on outcomes post-MI
4. Risk of MI is elevated by DM and equivalent to having a prior history of
MI
Answer: 4 - Risk of MI is elevated by DM and equivalent to having a prior
history of MI
Explanations:
DM elevates risk of MI and is considered a cardiovascular equivalent
DM is a major risk factor for coronary artery disease
1-year mortality in this group as high as 50%
Diabetics on insulin are no more likely at risk for MI than those not on
insulin
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Research Concepts:
Acute Myocardial Infarction:
Diabetes Mellitus:
Choices:
1. Calcium
2. Sodium
3. Magnesium
4. Chromium
Answer: 3 - Magnesium
Explanations:
Magnesium is now felt to be an important ion in the genesis of arrhythmias
induced by digoxin.
Magnesium is also used to treat Torsades.
Occasionally, potassium depletion may not be reversed until the magnesium
deficiency has first been corrected.
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Research Concepts:
Arrhythmias:
Digoxin:
Choices:
1. Systolic dysfunction
2. Diastolic dysfunction
3. Cardiac arrhythmia
4. Valvular heart disease
Answer: 2 - Diastolic dysfunction
Explanations:
Most patients with CHF have systolic dysfunction with EF <40%
40 to 50% of patients have diastolic dysfunction and often have normal EF
Causes of CHF should investigated including ischemic heart disease,
thyroid disease, and valvular heart disease
This patient most likely has CHF secondary to hypertension but the
possibility of CAD should be considered\
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Research Concepts:
Diastolic Dysfunction:
Choices:
1. Sarcoma
2. Myxoma
3. Rhabdomyoma
4. Fibroma
Answer: 2 - Myxoma
Explanations:
40 to 50% of primary cardiac tumors are myxomas
Fibromas are rare and found most often in infants
Sarcoma is the most common malignancy of the heart
Cardiac rhabdomyoma is the most common tumor of the heart in children
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Research Concepts:
Atrial Myxoma:
Choices:
1. Implantable cardiac defibrillator (ICD)
2. Coronary angiogram
3. Beta-blocker
4. Pacemaker
Answer: 1 - Implantable cardiac defibrillator (ICD)
Explanations:
An ICD is indicated in a patient with structural heart disease and history of
VT
A high risk for sudden cardiac death exists in those with a history of VT and
structural heart disease
Reassurance and no intervention are recommended in a patient with no
structural heart disease and nonsustained VT
Coronary angiogram nor pacemaker are indicated
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Research Concepts:
Ventricular Tachycardia:
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Research Concepts:
Aspirin:
Choices:
1. Potential for injury to coronary sinus
2. Inadequate right ventricular cooling
3. Inadequate capillary nutrient perfusion
4. Can be used as a sole method for cardiac protection
Answer: 4 - Can be used as a sole method for cardiac protection
Explanations:
If only retrograde cardioplegia is used, the right ventricle is not protected.
The patient will have severe right heart ischemia and failure if only
retrograde technique is used.
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Research Concepts:
Cardioplegia:
Choices:
1. Esophageal spasm can cause ST-segment depression or T-wave inversion
2. The CPK-MB rises within 1 to 2 hours after significant myocardial damage
3. New Q waves or ST-segment elevation have a predictive value of 75% and
specificity of 90%
4. CPK-MB elevation is more specific but less sensitive than total CK
elevation
Answer: 2 - The CPK-MB rises within 1 to 2 hours after significant
myocardial damage
Explanations:
Serum creatine phosphokinase (CPK) rises 4 to 8 hours after cellular
damage.
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Research Concepts:
Myocardial Infarction, Acute:
Choices:
1. Dopamine has more inotropic effect than dobutamine
2. Dopamine is not associated with hypotension
3. Dopamine reduces pulmonary capillary wedge pressure
4. Dopamine decreases peripheral resistance
Answer: 2 - Dopamine is not associated with hypotension
Explanations:
High dose of dopamine has alpha agonist property
This helps to counteract the hypotension in cardiogenic shock
Dopamine actually causes increased pulmonary capillary wedge pressure
Dobutamine has vasodilator properties and can only be used if there is no
hypotension
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Research Concepts:
Dopamine:
Cardiogenic Shock:
Choices:
1. There can be only one admitting or existing diagnosis
2. A medical condition existing simultaneously with another condition
3. A co-morbid condition is a predictor of at least one day of extended LOS
4. A condition or diagnosis documented at admission aside from the admitting
diagnosis.
Answer: 1 - There can be only one admitting or existing diagnosis
Explanations:
Patients may present with multiple diagnosis and conditions.
A co-morbid is a predictor of at least one day of extended LOS.
Co-morbid conditions may include two or more disorders existing
simultaneously.
A co-morbid condition or diagnosis documented at admission aside from
the admitting diagnosis.
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Research Concepts:
Co-morbid Condition:
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Research Concepts:
Polymerase Chain Reaction (PCR):
Choices:
1. Depressed ST segments
2. U wave
3. Flat T wave
4. Peaked T waves
Answer: 4 - Peaked T waves
Explanations:
ECG signs of hypokalemia include flattening of T waves and not peaked T
waves
Other features include a prominent U wave that appears as QT prolongation
St Segment depression and both atrial and ventricular arrhythmia may be
seen
Torsades de pointes is a common feature seen in patients with hypokalemia
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Research Concepts:
Electrocardiogram:
Hypokalemia:
Choices:
1. Obtain blood cultures
2. Instruct the patient to inhale deeply 10 times per hour or to use an incentive
spirometer
3. Change the dressing and culture the incision site
4. Obtain an abdominal CT scan
Answer: 2 - Instruct the patient to inhale deeply 10 times per hour or to use
an incentive spirometer
Explanations:
Mild temperature elevations postoperatively are most commonly due to
atelectasis from anesthesia.
Post operative respiratory infections typically present within the first 48
hours following surgery.
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Research Concepts:
Atelectasis:
Laparotomy:
Choices:
1. Infiltration
2. Osteomyelitis
3. Thrombosis
4. Bleeding
Answer: 2 - Osteomyelitis
Explanations:
Bleeding, infiltration, infection, and thrombosis are common complications
of peripheral IV placement.
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Research Concepts:
Intravenous Infusion:
Choices:
1. Digitalis
2. Nitroglycerin
3. Calcium channel blockers
4. Beta blockers
Answer: 1 - Digitalis
Explanations:
The best way to increase cardiac output in AS is to administer digoxin
Digoxin controls the heart rate and augments cardiac output
All the other drugs can reduce afterload and seriously harm the patient,
resulting in syncopal attacks
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Research Concepts:
Aortic Stenosis:
Choices:
1. Warm beddings
2. Warm fluids
3. Room temperature
4. Nutritional status
Answer: 3 - Room temperature
Explanations:
The temperature of the operating room should be adjusted for the comfort
of the patient.
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Research Concepts:
General Anesthesia:
Hypothermia:
Choices:
1. Automatic external defibrillator (AED)
2. Implantable cardioverter -defibrillator (ICD)
3. Pacemaker
4. None of the above
Answer: 2 - Implantable cardioverter -defibrillator (ICD)
Explanations:
ICDs improve long-term survival when compared to patients receiving only
medications S/P VF
AEDs would be used in the field and encompass prehospital care
Pacemakers are useful for those who suffer bradyarrhythmias
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Research Concepts:
Ventricular Fibrillation:
Cardioverter-Defibrillators, Implantable:
Choices:
1. Nitroprusside
2. Hydralazine
3. Minoxidil
4. Nifedipine
Answer: 1 - Nitroprusside
Explanations:
Nitroprusside is a potent vasodilator of both arterioles and venules
Nifedipine and hydralazine are potent arteriolar vasodilators
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Research Concepts:
Sodium Nitroprusside:
Preload:
Afterload Reduction:
Choices:
1. Ceftriaxone
2. Clindamycin
3. Vancomycin
4. Gentamycin
Answer: 2 - Clindamycin
Explanations:
Bacteroides bacteria are susceptible to metronidazole, carbapenems,
chloramphenicol, and other beta lactam inhibitors.
Clindamycin is very effective against anaerobes and also has good activity
against some gram-positive bacteria.
Quinolones have worked against bacteroides but most species have now
developed resistance to these antibiotics.
Cephalosporins, especially the first generation, are active against
bacteroides.
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Research Concepts:
Bacteroides Infection:
Choices:
1. May be charged with a misdemeanor
2. Is within her rights to choose not to act
3. Is likely incur liability if she uses reasonable care
4. May be charged with a felony
Answer: 2 - Is within her rights to choose not to act
Explanations:
Under U.S. law there is no duty to rescue, however, if one chooses to
rescue, one must do so responsibly.
Good Samaritan laws protect those who choose to rescue from liability if
they use reasonable care.
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Research Concepts:
Good Samaritan Laws:
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Research Concepts:
Atelectasis:
Choices:
1. Liquid
2. Solid
3. Gas
4. Ideal gas
Answer: 1 - Liquid
Explanations:
Poiseuille's law describes the laminar flow of a fluid.
It can be used to describe blood flow through various vessels or air through
airways.
The change in pressure is proportional to the length, viscosity, and flow
rate.
It is inversely proportional to the radius to the fourth power.
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Research Concepts:
Poiseuille's Law:
Choices:
1. Low Pa02
2. High PaC02
3. Hypothermia
4. All of them
Answer: 4 - All of them
Explanations:
Factors that worsen pulmonary vasoconstriction include a low PaO2, high
PaC02 and low pH
Hypothermia is often a cause of vasoconstriction
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Research Concepts:
Pulmonary Vasoconstriction:
Choices:
1. Immediate cardiac catheterization with likely stent placement
2. IV nitroprusside and an urgent transesophageal echocardiogram
3. IV morphine and nitrates, oxygen and aspirin
4. Serial cardiac enzymes and IV beta-blockers and heparin
Answer: 2 - IV nitroprusside and an urgent transesophageal echocardiogram
Explanations:
This case is suggestive of aortic dissection that can be diagnosed with
transesophageal echo
Beta-blockers are for rate control and nitroprusside for BP control
A proximal, Type A, dissection is associated with aortic insufficiency and
hypertension and requires urgent repair while a distal dissection is
associated with arterial obstruction leading to renal failure and bowel
ischemia
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Research Concepts:
Dissection, Aortic:
Choices:
1. Fresh frozen plasma (FFP)
2. Vitamin C
3. Aminocaproic acid
4. Factor X
Answer: 3 - Aminocaproic acid
Explanations:
Aminocaproic is an inhibitor of fibrinolysis
It can be used in a tPA overdose to combat toxic effects
FFP can be used in the treatment of deficiencies of coagulation proteins
Vitamin C and Factor X have no place in the treatment of tPA toxicity
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Research Concepts:
TPA Therapy:
Choices:
1. Place the patient in reverse Trendelenburg
2. Irrigation of the surgical field
3. Aspiration of air from a multiforce central venous pressure catheter
4. Manual occlusion of the jugular veins
Answer: 1 - Place the patient in reverse Trendelenburg
Explanations:
The patient should be placed in the left lateral decubitus position with the
head lowered
Procedures done in the sitting position have a high incidence of venous air
embolism (VAE)
VAE has signs of bronchoconstriction, hypercarbia, hypotension, shock,
cardiac arrhythmias, and increased airway pressure
The most sensitive test is transesophageal echocardiography
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Research Concepts:
Venous Air Embolism:
Choices:
1. ACE inhibitors
2. Beta blockers
3. Calcium channel blockers
4. Loop diuretics
Answer: 3 - Calcium channel blockers
Explanations:
Calcium channel blockers can increase morbidity and mortality in patients
with STEMI
Medications proven to reduce mortality are beta blockers, thrombolytics,
and ACE inhibitors
Diuretics should be used as needed
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Research Concepts:
Acute ST-elevation Myocardial Infarction (STEMI):
Choices:
1. Postoperative viral infection
2. Damage to phrenic nerve
3. Trauma to recurrent laryngeal nerve
4. Injury to sympathetic chain
Answer: 3 - Trauma to recurrent laryngeal nerve
Explanations:
Anytime a patient undergoes surgery to repair the proximal aorta, if
hoarseness occurs postoperatively, laryngeal nerve injury must be
suspected.
Damage to the phrenic nerve presents with diaphragmatic paralysis.
The recurrent nerve runs between the left common carotid and the left
subclavian. It can easily be injured by placing a clamp in that region.
Injury to the sympathetic chain presents with Horner syndrome.
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Research Concepts:
Aorta, Trauma:
Choices:
1. 1.5 to 2.0
2. 2.0 to 2.5
3. 2.5 to 3.0
4. >3.0
Answer: 2 - 2.0 to 2.5
Explanations:
Treatment of a thrombus requires an INR between 2.0 and 2.5 and therapy
usually occurs for 3-6 months.
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Research Concepts:
Anticoagulation:
Choices:
1. Beta-blockers
2. Antiplatelet agents
3. Statins
4. Calcium channel blockers
Answer: 4 - Calcium channel blockers
Explanations:
Beta-blockers, antiplatelet agents, statins, and ACE inhibitors are
independently and strongly associated with lower 6-month mortality in
ACS
The medical therapies also had benefit across the different TIMI risk groups
Calcium channel blockers do not improve survival in ACS
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Research Concepts:
Coronary Syndrome, Acute:
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Research Concepts:
Sternal Infection:
Choices:
1. Myxoma
2. Melanoma
3. Rhabdomyoma
4. Metastatic lesions
Answer: 3 - Rhabdomyoma
Explanations:
Rhabdomyomas occur frequently in patients with tuberous sclerosis.
These benign heart tumors often cause outflow tract obstruction and
valvular dysfunction.
Most patients have a variety of arrhythmias.
The lesions do shrink or disappear with time and do not account for
increased mortality.
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Research Concepts:
Tuberous Sclerosis:
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Research Concepts:
Informed Consent:
Choices:
1. Class 1 agents increase sodium influx
2. Class 2 agents antagonize the sympathomimetics
3. Amiodarone is a class 3 agent
4. Sotalol has class 2 and 3 effects
Answer: 1 - Class 1 agents increase sodium influx
Explanations:
Class I agents inhibit sodium entry
Class Ia agents affect the QRS and include quinidine, procainamide, and
disopyramide.
Class Ib agents do not affect the QRS and include lidocaine, phenytoin, and
mexiletine.
Class Ic agents include encainide, flecainide, propafenone, and moracizine.
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Research Concepts:
Antiarrhythmic Medication:
Choices:
1. Ventricular septal rupture
2. Acute papillary muscle rupture
3. Mural thrombus
4. Aortic stenosis
Answer: 1 - Ventricular septal rupture
Explanations:
The patient has developed acute mitral regurgitation secondary to papillary
muscle rupture
Ventricular septal rupture produces a holosystolic murmur
Aortic stenosis would not occur acutely
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Research Concepts:
Acute Myocardial Infarction:
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Research Concepts:
Urinary Retention:
Choices:
1. Nylon
2. Stainless steel wire
3. Chromic catgut
4. Silk
Answer: 3 - Chromic catgut
Explanations:
Allergic reactions to sutures is rare
Allergic reactions however are most common after use of chromic catgut
Allergies to silk and nylon are also rarely reported
The least reactive material is stainless steel wire
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Research Concepts:
Suture Allergy:
Choices:
1. Ciprofloxacin
2. Metoprolol
3. Penicillin
4. Clonidine
Answer: 3 - Penicillin
Explanations:
Lidocaine is used as a local anesthetic
It is also used as an antiarrhythmic
Ciprofloxacin, metoprolol and clonidine can all increase lidocaine blood
levels and lead to toxicity
Penicillin does not affect lidocaine blood levels
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Research Concepts:
Lidocaine:
Drug Interactions:
Choices:
1. Non-anion gap metabolic acidosis
2. Respiratory acidosis with compensatory metabolic alkalosis
3. Anion-gap metabolic acidosis
4. Metabolic alkalosis
Answer: 1 - Non-anion gap metabolic acidosis
Explanations:
The patient is acidotic with low PCO2 ruling out respiratory acidosis
The anion gap is normal {AG= [Na+] ? [Cl?] ? [HCO3?]}
There is a reduction in PCO2 showing respiratory compensation
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Research Concepts:
Metabolic Acidosis:
Choices:
1. Digoxin
2. Spironolactone
3. Lisinopril
4. Chlorothiazide
Answer: 3 - Lisinopril
Explanations:
Afterload reduction is considered a very good approach in the management
of congestive heart failure
ACE inhibitors can effectively reduce afterload by reducing angiotensin II
levels
Diuretics may increase afterload by indirectly increasing sympathetic tone
while causing volume depletion
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Research Concepts:
Afterload Reduction:
Choices:
1. Decreased workload of the respiratory muscles
2. Lung hyperinflation
3. Metabolic acidosis
4. Respiratory acidosis
Answer: 2 - Lung hyperinflation
Explanations:
Regardless of the respiratory rate, ACV assists each spontaneous breath,
resulting in hyperinflation, increased work load of respiratory muscles, and
respiratory alkalosis
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Research Concepts:
Assist Control Ventilation:
Choices:
1. Melanoma
2. Renal cell adenocarcinoma
3. Colon cancer
4. Liver adenocarcinoma
Answer: 2 - Renal cell adenocarcinoma
Explanations:
Inferior vena cava syndrome is due to obstruction of the inferior vena cava.
The obstruction is usually due to tumor thrombus in the renal vein
extending into the IVC.
Renal cell cancer has a propensity of invading the renal vein and causing
intraluminal thrombosis. Caval thrombosis is also seen secondary to
hepatomas and adrenal cortical carcinomas.
Compression of the inferior vena cava can also occur by a gravid uterus and
Budd Chiari syndrome.
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Research Concepts:
Renal Cell Carcinoma:
Choices:
1. Serum drug level 30 minutes after the 3rd dose
2. Serum drug level 30 minutes before the 3rd dose
3. Serum drug level 30 minutes after the 1st dose
4. Serum drug level 2 hours after the 2nd dose
Answer: 1 - Serum drug level 30 minutes after the 3rd dose
Explanations:
Peak levels after the 3rd dose should be drawn
Peak levels correlate with ototoxicity
Patients to be treated more than 2 weeks should be monitored with
audiometry
Trough levels are drawn just before a dose to insure efficacy
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Research Concepts:
Aminoglycoside Toxicity:
Choices:
1. Tubocurarine
2. Atropine
3. Nitrous oxide
4. Neostigmine
Answer: 2 - Atropine
Explanations:
Atropine is widely used with anesthesia to decrease the oral secretions.
Atropine is only administered via an intravenous injections and works
immediately.
Atropine increases heart rate, dilates pupils, causes dry skin, and
anesthetizes the nerve endings in the skin.
Atropine also relaxes smooth muscle and suppresses gland and mucous
secretions. In the past, it was used to treat peptic ulcer by reducing the
production of stomach acid.
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Research Concepts:
Atropine:
Choices:
1. Physical dependence to heroin
2. Infective endocarditis
3. Splenomegaly
4. Sarcoidosis
Answer: 2 - Infective endocarditis
Explanations:
Bracht-Wachter bodies are often a finding in patients with infective
endocarditis.
Bracht-Wachter bodies are yellowish-white miliary spots on the
myocardium.
Bracht-Wachter bodies are collections of inflammatory cells.
Other features of endocarditis include Janeway lesions, Roth spots, and
Osler nodes.
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Research Concepts:
Endocarditis, Bacterial:
Choices:
1. ACE inhibitors and diuretics
2. Cardiac catheterization and aortic valve replacement
3. Dipyridamole stress test before further recommendation
4. Digoxin, diuretics, and ACE inhibitor
Answer: 2 - Cardiac catheterization and aortic valve replacement
Explanations:
The patient has LV dilation and dysfunction so valve replacement is needed
Coronary artery disease should be ruled out in a patient this age
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Research Concepts:
Aortic Regurgitation:
Heart Failure:
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Research Concepts:
Trauma Assessment:
Choices:
1. Methadone
2. Morphine
3. Fentanyl
4. Percocet
Answer: 1 - Methadone
Explanations:
Methadone is not routinely used in the ICU for pain control
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Research Concepts:
Acute Pain, Anesthesia:
Choices:
1. D-dimers assay
2. Compression ultrasonography
3. Impedance plethysmography
4. Coagulation profile
Answer: 2 - Compression ultrasonography
Explanations:
A more direct approach to the diagnosis of DVT involves use of
compression ultrasonography
Compression ultrasonography is the noninvasive approach of choice for the
diagnosis of symptomatic patients with a first episode of suspected DVT
Venography is not recommended as an initial screening due to patient
discomfort
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Research Concepts:
Deep Vein Thrombosis:
Choices:
1. Administer heparin
2. Administer epinephrine
3. Resume CPB
4. Insert IABP
Answer: 4 - Insert IABP
Explanations:
An occasional diabetic patient may show a severe reaction to protamine
The cardiovascular effects of protamine include hypotension, anaphylaxis
and severe pulmonary vasoconstriction
At times, just replacing volume and inotropic support may not be enough
and one has to return to CPB and rest the patient. There is no place for an
IABP here
After going back on CPB, the patient is weaned off slowly and protamine
may have to be given very slowly or not all
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Research Concepts:
Protamine:
Choices:
1. > 2.0 mm ST segment depression
2. ST segment depression in multiple leads
3. Ventricular arrhythmias
4. High maximal heart rate
Answer: 4 - High maximal heart rate
Explanations:
High-risk exercise ECG variables include ?2.0 mm ST-segment depression,
?1 mm ST-segment depression in stage I, ST segment depression in
multiple leads and ST-segment depression > 1.0 mm for > 5 minutes during
the recovery period,
Other variables include achievement of a workload of less than 4 METS or
a low maximal heart rate
Abnormal blood pressure response and ventricular arrhythmias are still
others
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Research Concepts:
Treadmill Stress Testing:
Choices:
1. Nifedipine
2. Digoxin
3. Furosemide
4. Captopril
Answer: 4 - Captopril
Explanations:
ACE-inhibitors are well known to increase long term survival in patient
with congestive heart failure
Calcium channel blockers and antiarrhythmics have not been documented
to improve long term survival
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Research Concepts:
Heart Failure, Congestive:
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Research Concepts:
Universal Precautions:
HIV Transmission:
Choices:
1. Marfan Syndrome
2. Syphilis
3. Degenerative aortic disease
4. Takayasu disease
Answer: 2 - Syphilis
Explanations:
Cardiac complications of syphilis include aortitis, aortic aneurysm, and
aortic regurgitation.
After many years of infection, the inflammation causes scarring of the
aortic wall, leading to aneurysm formation.
Histological study often reveals a mononuclear and plasma cell infiltrate
into the vaso vasorum.
The inflammatory reaction by the spirochete causes an obliterative
endarteritis.
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Research Concepts:
Syphilis:
Choices:
1. Nervousness
2. Dry skin
3. Thirst
4. Edema
Answer: 1 - Nervousness
Explanations:
Common presentations of hypoglycemia are tachycardia, sweating, and
nervousness.
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Research Concepts:
Hypoglycemia:
Choices:
1. Oxycontin
2. Nalbuphine
3. Methadone
4. Hydromorphone
Answer: 2 - Nalbuphine
Explanations:
Nalbuphine is a mixed opioid agonist-antagonist.
It may cause withdrawal symptoms in patients chronically receiving
opioids.
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Research Concepts:
Opioids:
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Research Concepts:
Hepatitis B:
Choices:
1. Cardiac tamponade
2. Asthma
3. Constrictive pericarditis
4. Pneumonia
Answer: 4 - Pneumonia
Explanations:
Pulsus paradoxus represents a decrease in pulse volume (usually >10 mm
Hg) during inspiration
it can have cardiac causes, pulmonary causes and non-cardiac/non-
pulmonary causes
Cardiac causes include cardiac tamponade, constrictive pericarditis,
pericardial effusion and shock
Pulmonary causes include asthma, COPD and tension pneumothorax
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Research Concepts:
Pulsus Paradoxus:
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Drug Trials:
Choices:
1. LDH
2. Troponins
3. CK-MB
4. Myoglobin
Answer: 4 - Myoglobin
Explanations:
Myoglobin is the earliest marker and rises 2-4 hours after MI
It lacks cardiospecificity and is therefore of limited diagnostic value with
regard to MI
Troponins are the most sensitive and specific marker for MI
In descending order of appearance--myoglobin, CK-MB, troponin and LDH
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Research Concepts:
Myoglobin:
Choices:
1. Hyperkalemia
2. Hypophosphatemia
3. Hypocalcemia
4. Hypernatremia
Answer: 2 - Hypophosphatemia
Explanations:
Severe hypophosphatemia can cause muscle weakness, hemolytic anemia,
decreased cardiac output, rhabdomyolysis, and decreased oxygen
availability to tissue
It can be iatrogenic or secondary to chronic alcoholism, diabetic
ketoacidosis, refeeding, and acute respiratory acidosis
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Research Concepts:
Hypophosphatemia:
Choices:
1. Seizures
2. Visual hallucinations
3. Tachycardia and mild tremors
4. Auditory hallucinations
Answer: 3 - Tachycardia and mild tremors
Explanations:
Seizures and visual hallucinations are seen later in alcohol withdrawal
Tachycardia, mild tremors, anxiety, restlessness, early signs and symptoms
of ETOH withdrawal
Auditory hallucinations are more commonly associated with mental illness,
such as schizophrenia
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Research Concepts:
Alcohol Withdrawal:
Choices:
1. Mydriasis
2. Constipation
3. Sedation
4. Urinary retention
Answer: 1 - Mydriasis
Explanations:
Opioid analgesics cause miosis not mydriasis
Other effects are analgesia, euphoria, depression of the cough reflex,
emesis, respiratory depression, and relaxation of the smooth muscle of the
bladder
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Research Concepts:
Opioid Analgesics:
Choices:
1. Arrhythmias
2. Anaphylaxis
3. Renal damage
4. Rebound hypertensive crisis
Answer: 4 - Rebound hypertensive crisis
Explanations:
Patients on clonidine should not discontinue it abruptly.
Suddenly stopping clonidine can lead to rebound hypertension, anxiety, and
tremor.
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Research Concepts:
Clonidine:
Choices:
1. Hydrochlorothiazide
2. Furosemide
3. Ethacrynic acid
4. Metolazone
Answer: 3 - Ethacrynic acid
Explanations:
Furosemide and thiazide diuretics are sulfa drugs and should be avoided in
sulfa allergy
Ethacrynic acid is a loop diuretic with no sulfa component
It is safe to use in patients with sulfa allergy
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Research Concepts:
Sulfa Allergy:
Ethacrynic Acid:
Diuretics:
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Question 1441: In adults, what is the most common cause of bilateral
lower extremity edema?
Choices:
1. Varicose veins
2. Heart failure
3. Lymphedema
4. Renal failure
Answer: 2 - Heart failure
Explanations:
The most common causes of extremity edema are of systemic origin and
produce bilateral lower extremity involvement. Cardiac failure is the most
common cause followed by renal failure.
Bilateral lower extremity edema is also secondary to cirrhosis, nephrotic
syndrome, and malnutrition. Another frequent cause of bilateral leg
enlargement is lipedema.
Lipedema is not true edema. It is usually found in obese females and
involves the bilateral lower extremities.
It is non-pitting and greatest at the ankle and legs with characteristic sparing
of the feet. There are no skin changes, and the enlargement does not resolve
with elevation.
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Research Concepts:
Edema:
Choices:
1. Hypotonic solution
2. Hypertonic solution
3. Isotonic solution
4. Tonic solution
Answer: 2 - Hypertonic solution
Explanations:
D5NS is a hypertonic solution
A hypertonic solution has increased solutes compared to cells
A hypotonic solution has decreased solutes compared to cells
An isotonic solution has a solute composition similar to blood plasma
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Research Concepts:
Hypertonic Fluids:
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Research Concepts:
Cardiac Physiology:
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Research Concepts:
Quinidine:
Choices:
1. Hyperkalemia
2. Hypermagnesemia
3. Hypercalcemia
4. Hypernatremia
Answer: 1 - Hyperkalemia
Explanations:
Hyperkalemia may be caused by ACE inhibitors due to decreased
aldosterone production and decreased excretion of potassium.
ACE inhibitors are often associated with a transient increase in creatinine.
Renal failure may result in the scenario of bilateral renal artery stenosis.
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Research Concepts:
Angiotensin Converting Enzyme Inhibitors (ACEI):
Hyperkalemia:
Choices:
1. Amiodarone
2. Procainamide
3. Erythromycin
4. Hyperkalemia
Answer: 4 - Hyperkalemia
Explanations:
Torsades de pointes is a polymorphic ventricular tachycardia which literally
translates to "twisting of spikes."
Multiple cardiac medications can cause this arrhythmia, including
quinidine, disopyramide, dofetilide, ibutilide, and sotalol.
Anti-infectious agents that can cause this condition include macrolides and
pentamidine.
An anti-emetic that causes torsades de pointes is droperidol. Haloperidol,
pimozide, chlorpromazine, and thioridazine are anti-psychotics with this
complication.
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Research Concepts:
Torsade de Pointes:
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Research Concepts:
Furosemide:
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Research Concepts:
Hypocarbia:
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Neuroleptic Medication:
Choices:
1. Stop CPB
2. Slow flow rate
3. Aspirate air from tubing
4. Place head down
Answer: 1 - Stop CPB
Explanations:
Whenever air is seen in the arterial line or a break in the circuit occurs, the
first thing to do is stop the pump
If air does get into the heart, the patient has to be placed in Trendelenburg
position, retrograde purging of the heart, aortic root venting and aspirating
the underside of the arch to remove as much as air possible
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Research Concepts:
CPB, Air Embolism:
Choices:
1. Minimize oxygen demand
2. Maximize coronary flow
3. Lower heart rate
4. Increase afterload
Answer: 4 - Increase afterload
Explanations:
The goal in patients with coronary artery disease is to control blood
pressure and minimize the oxygen demand.
Increasing afterload would increase work for the heart.
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Research Concepts:
Coronary Artery Disease:
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Cardiomyopathy, Dilated:
Choices:
1. Hydrochlorothiazide
2. Verapamil
3. Enalapril
4. Furosemide
Answer: 1 - Hydrochlorothiazide
Explanations:
Thiazide diuretics should be used with caution in diabetic patients
Insulin resistance and hyperglycemia may result from thiazide diuretic
therapy
ACE inhibitors are very helpful in diabetic patients
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Research Concepts:
Diabetes Mellitus, Type 1:
Thiazide Diuretics:
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Question 1454: On which of the following do low molecular weight
heparins have their effect?
Choices:
1. Anti thrombin 3
2. Plasminogen
3. Factor X
4. Factor 7
Answer: 3 - Factor X
Explanations:
Enoxaparin is a typical low molecular weight heparin.
All low molecular weight heparins act on factor X.
Other low molecular weight heparin-like products include dalteparin and
danaparoid.
The major toxicity with these agents is bleeding.
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Research Concepts:
Low Molecular Weight Heparin (LMWH):
Choices:
1. Fem-fem bypass
2. Right thoracotomy
3. Median sternotomy
4. Minimally invasive approach
Answer: 2 - Right thoracotomy
Explanations:
A right thoracotomy can be used sometimes. With this approach, the
incision is through the left atrium just behind the interatrial groove, as in
median sternotomy
Its chief disadvantages are the limited field provided by the anterolateral
interspace and the relative inaccessibility of the ascending aorta both for
cannulation and for cardioplegia infusion
The groin may have to be cannulated for femoral artery access; the
procedure can be done under fibrillatory arrest
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Research Concepts:
Mitral Valve Replacement:
Choices:
1. Left coronary artery
2. Right coronary artery
3. Thoracic artery
4. Internal carotid
Answer: 2 - Right coronary artery
Explanations:
The middle cardiac vein runs from the apex of the heart, along the posterior
longitudinal sulcus, and drains into the coronary sinus.
It is accompanied by the right coronary artery middle cardiac vein in the
posterior interventricular groove.
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Heart Anatomy:
Choices:
1. Wheezing
2. Angina
3. Worst headache of his life
4. Meningitis
Answer: 2 - Angina
Explanations:
A Levine sign is making a clenched fist in front of the chest while
describing chest pain.
Patients may describe angina pain as pressing, squeezing, or strangling.
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Research Concepts:
Angina, Unstable:
Angina, Stable:
Choices:
1. Triglycerides
2. HDL
3. Blood pressure
4. GFR
Answer: 4 - GFR
Explanations:
The metabolic syndrome is characterized by obesity, glucose intolerance,
and elevated lipid levels and blood pressure
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Research Concepts:
Metabolic Syndrome:
Choices:
1. Inadequate landmark
2. Improper needle position
3. Aiming needle too cephalad
4. Too shallow trajectory
Answer: 2 - Improper needle position
Explanations:
There are many reasons why residents fail at cannulating the subclavian
vein.
The most common reason is improper needle position, followed by
insertion of needle through periosteum.
Other reasons for complications during subclavian line placement include
taking a shallow trajectory, aiming needle to cephalad, and failure to keep
needle in place for wire passage.
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Research Concepts:
Central Venous Access, Subclavian Vein, Subclavian:
Choices:
1. Labetalol
2. Nedocromil
3. Morphine
4. Propranolol
Answer: 3 - Morphine
Explanations:
Morphine can displace histamine from granule storage sites
Therefore, morphine can cause pruritis in up to 80% of patients
Nedocromil is a mast cell stabilizer
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Research Concepts:
Histamine:
Morphine:
Choices:
1. Vital capacity (VC)
2. Forced vital capacity (FVC)
3. Tidal volume
4. CO2 volume
Answer: 4 - CO2 volume
Explanations:
Spirometry can help diagnose lung diseases such as asthma, COPD, cystic
fibrosis, and pulmonary fibrosis
It can also be used to gauge response to treatment interventions
VC, FVC and tidal volume, residual volume, total lung capacity, expiratory
reserve volume and peak flow are some of the components measured
CO2 volume is not a part of spirometric testing
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Research Concepts:
Pulmonary Function Tests:
Choices:
1. Trauma
2. MI
3. Congenital
4. Aortic aneurysms
Answer: 2 - MI
Explanations:
Left ventricular aneurysms are most common after an MI.
The aneurysms generally are seen after 1 week and take about 4-6 weeks to
mature.
Unlike other aneurysms, the risk of rupture is low. These aneurysms have
fibrous tissue and do not contribute to the contractility of the ventricle.
Large aneurysms require surgery, as they have a tendency to form blood
clots.
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Research Concepts:
Ventricular Aneurysms:
Choices:
1. Increase dose of heparin
2. Change to low molecular weight heparin
3. Stop all heparin
4. Give a bolus of heparin
Answer: 3 - Stop all heparin
Explanations:
Heparin induced thrombocytopenia and thrombosis is a serious
complication of heparin therapy.
Even though the platelet counts are low after heparin, thrombosis can occur.
The most important treatment for heparin-induced thrombocytopenia is to
stop all heparin.
The clot in the leg may be removed by embolectomy or one may start
warfarin. Continuation of heparin therapy worsens the condition.
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Research Concepts:
Thrombocytopenia, Heparin Induced:
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Research Concepts:
Coronary Artery Surgery:
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Cor Triatriatum:
Choices:
1. Oral
2. Sublingual
3. Inhalational
4. Intravenous
Answer: 1 - Oral
Explanations:
Orally administered drugs pass through the portal circulation to the liver
Intravenous drugs do not undergo first pass metabolism
Sublingual administration does not go through first pass effect and absorbed
directly from the oral mucosa
Inhalational route is unlikely to undergo first pass effect
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Research Concepts:
First Pass effect:
Choices:
1. Nurse
2. Charge nurse
3. Attending
4. Resident
Answer: 3 - Attending
Explanations:
The ultimate decision to transfer a patient is made by the attending
physician
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Research Concepts:
Hospital Transfer:
Choices:
1. It occurs months after starting therapy
2. It is caused by antibodies formed against platelet receptors
3. Surgical patients are at greater risk than medical patients
4. Hypercoagulability is a major problem
Answer: 1 - It occurs months after starting therapy
Explanations:
Thrombocytopenia is a well-recognized complication of heparin therapy
It usually occurs within 5 to 10 days after heparin treatment has started
Delayed manifestation of such a disease is rarely seen beyond two weeks
Instead of hypocoagulation, hypercoagulability is a major problem
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Research Concepts:
Thrombocytopenia, Heparin Induced:
Choices:
1. Argatroban
2. Coumadin
3. Fondaparinux
4. Lepirudin
Answer: 2 - Coumadin
Explanations:
Anticoagulant options with HIT are argatroban, fondaparinux, and
lepirudin.
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Research Concepts:
Thrombocytopenia, Heparin Induced:
Choices:
1. Captopril
2. Spironolactone
3. Methyldopa
4. Nitroglycerin
Answer: 4 - Nitroglycerin
Explanations:
Nitroglycerin increases nitric oxide levels and enhances the production of
cGMP
Sildenafil works by inhibiting phosphodiesterases to reduce cGMP
degradation
Administering both drugs together raises the cGMP level that can cause
dangerous vasodilation, shock, and syncope
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Research Concepts:
Sildenafil:
Nitroglycerin:
Choices:
1. Obese patients
2. Pediatric patients that have had multiple procedures
3. Patients on long-term steroid therapy
4. Patients taking lopinavir/ritonavir
Answer: 1 - Obese patients
Explanations:
Most anesthetic drugs have high affinity for adipose tissue.
Increased fat stores may increase requirements for fat-soluble anesthetics.
Clearance from the body is also a problem since it is released from fat
slowly.
Ritonavir is a known liver enzyme inhibitor and delays metabolism of some
medications
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Research Concepts:
Obesity:
General Anesthesia:
Choices:
1. Hemoglobin levels
2. WBC count
3. X-ray of the chest
4. Urine pregnancy
Answer: 4 - Urine pregnancy
Explanations:
No testing is needed other than a negative pregnancy test.
Routine preoperative testing of a healthy young adult is not recommended.
There have been no studies showing decreased operative morbidity or
mortality.
With advancing age, some laboratories or ECG may be appropriate.
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Research Concepts:
Preoperative Testing:
Choices:
1. I
2. II
3. III
4. IV
Answer: 1 - I
Explanations:
NYHA class I patients have no limitation of activity. NYHA class II
patients have slight limitation of activity.
NYHA class III patients have marked limitation of activity. NYHA class IV
patients have symptoms at rest and are unable to carry out any activity
without discomfort
Heart Failure Society of America. Retrieved from
www.abouthf.org/questions_stages.htm
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Research Concepts:
Heart Failure, Congestive:
Choices:
1. Epinephrine
2. Amiodarone
3. Digoxin
4. Lidocaine
Answer: 2 - Amiodarone
Explanations:
If the patient is stable then medications can be used to control the heart rate.
Evidence indicates that the heart rate must be under 110 but some experts
say under 80 is better.
American College of Cardiology indicates that drugs like flecainide,
propafenone, and ibutilide do work well.
Amiodarone has consistently been shown to be effective both orally and IV
and is widely used in patients. The only problem is that amiodarone does
have side effects and should not be used for long term.
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Research Concepts:
Atrial Fibrillation:
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Research Concepts:
Protamine:
Choices:
1. Some pre-excitation syndromes are not characterized by a delta wave
2. Interruption of the sinoatrial node's blood supply is the main reason for
bradyarrhythmias in acute inferior wall myocardial infarction
3. Ventricular repolarization can be affected by hypoxia, pain, myocardial
ischemia, fever, abnormal depolarization, and drugs
4. Atrial fibrillation, atrial flutter, and paroxysmal supraventricular
tachycardia are the most common tachyarrhythmias seen with Wolff-
Parkinson-White syndrome
Answer: 2 - Interruption of the sinoatrial node's blood supply is the main
reason for bradyarrhythmias in acute inferior wall myocardial infarction
Explanations:
Because 90% of humans have a blood supply to the AV node coming from
a branch off the right coronary artery, AV conduction disturbances often
occur in acute inferior wall myocardial infarction.
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Research Concepts:
Wolff-Parkinson-White Syndrome:
Choices:
1. Amiodarone
2. Verapamil
3. Phenytoin
4. Metoprolol
Answer: 2 - Verapamil
Explanations:
Treatment of MAT should focus on treatment of underlying problems
Calcium channel blockers such as verapamil have been documented to be
effective in MAT
Other medications that can be used in this setting are beta blockers
Beta blockers are usually not recommended in these patients since most of
them have COPD
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Research Concepts:
Multifocal Atrial Tachycardia:
Choices:
1. Homocysteine
2. C-reactive protein (CRP)
3. Methylenetetrahydrofolate reductase (MTHFR) genotype
4. Diabetes mellitus (DM)
Answer: 3 - Methylenetetrahydrofolate reductase (MTHFR) genotype
Explanations:
Elevated homocysteine, increasing age, decreased LVEF, DM, elevated
CRP and hyperlipidemia were found to be significant predictors of
mortality in patients with severe CAD
Severe CAD was defined as >70% stenosis on angiogram
Homozygosity for the MTHFR genotype was weakly predictive of
homocysteine levels but not mortality
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Research Concepts:
Mortality:
Choices:
1. Emergency Department physician
2. Primary care physician (PCP) of patient
3. Transplant surgeon performing the procedure
4. Consulting physician
Answer: 3 - Transplant surgeon performing the procedure
Explanations:
Any physician involved in the transplant procedure is ineligible to certify
time of death.
The patient's PCP can certify time of death.
An emergency physician can certify time of death.
An organ donation may be revoked by written or oral means.
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Research Concepts:
Documentation:
Death Certification:
Choices:
1. Left thoracotomy
2. Right thoracotomy
3. Median sternotomy
4. Cervical neck incision
Answer: 3 - Median sternotomy
Explanations:
A median sternotomy gives the best exposure to the innominate artery and
trachea.
During surgery, the innominate artery must be ligated and the hole in the
trachea should be closed with a muscle flap.
If a surgeon is not available, one can compress the innominate artery
against the sternum with a finger.
One may also attempt to place an endotracheal tube distal to the bleeding
site.
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Research Concepts:
Tracheo-innominate Artery Fistula:
Choices:
1. Chest pain
2. Syncope
3. Hungry
4. Sleepy
Answer: 2 - Syncope
Explanations:
During a cardiac arrest, most patients will tell you that they feel lightheaded
or have a syncopal feeling.
Asystole may occur during near drowning, stroke, massive pulmonary
embolus, hyperkalemia, hypothermia, or VT.
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Research Concepts:
Cardiac Arrest:
Choices:
1. Furosemide
2. Thiazides
3. Mannitol
4. Carbonic anhydrase
Answer: 1 - Furosemide
Explanations:
The major application of loop diuretics is in the treatment of acute
pulmonary edema, where pulmonary vasodilating actions also play a role.
Loop diuretics also aid in the removal of excess body fluids.
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Research Concepts:
Congestive Heart Failure And Pulmonary Edema:
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Research Concepts:
Opioids:
Choices:
1. ECG
2. Cardiac catheterization
3. Echocardiogram
4. CT scan
Answer: 3 - Echocardiogram
Explanations:
An echocardiogram can evaluate the severity of aortic regurgitation
Valve replacement is the next step
Antibiotic is probably indicated even if patient is not symptomatic
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Research Concepts:
Endocarditis, Bacterial:
Aortic Regurgitation:
Choices:
1. Anti-tussive action
2. Contraction of biliary ducts
3. Sedation
4. Increased peristalsis
Answer: 4 - Increased peristalsis
Explanations:
Morphine causes constipation not increased peristalsis
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Research Concepts:
Opioids:
Choices:
1. Hypotension
2. Bradycardia
3. Malignant hyperthermia
4. Dry mouth
Answer: 4 - Dry mouth
Explanations:
Succinylcholine is a neuromuscular blocking agent used to facilitate
endotracheal intubation and muscle relaxation
It is the shortest acting of the neuromuscular blocking agents
Side effects may include hypotension, bradycardia, and rarely malignant
hyperthermia
It can cause excessive salivation as opposed to dry mouth
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Research Concepts:
Succinylcholine:
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Research Concepts:
Stroke Volume:
Choices:
1. Liver disease
2. Vitamin B12 deficiency
3. Hypertension
4. Kidney disease
Answer: 3 - Hypertension
Explanations:
Sodium nitroprusside is indicated for elevated blood pressure.
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Research Concepts:
Nitroprusside:
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Research Concepts:
Hyperkalemia:
Choices:
1. Lidocaine
2. Metoprolol
3. Morphine
4. Albuterol
Answer: 3 - Morphine
Explanations:
Morphine is metabolized by liver to morphine 6 glucuronide
The metabolite is responsible for analgesic property
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Research Concepts:
Morphine:
Choices:
1. Amiodarone
2. Sotalol
3. Lidocaine
4. Ticlopidine
Answer: 2 - Sotalol
Explanations:
Torsades is a ventricular arrhythmia of varying polarity.
The arrhythmia is a rapid polymorphic ventricular tachycardia with a
typical twist of the QRS complex around the isoelectric baseline.
Torsade is a side effects of certain anti arrhythmic drugs like Sotalol,
quinidine and procainamide.
Common causes of torsades include hypomagnesemia, hypokalemia and
macrolide antibiotics.
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Research Concepts:
Sotalol:
Choices:
1. Esmolol
2. Atenolol
3. Nadolol
4. Metoprolol
Answer: 3 - Nadolol
Explanations:
Non selective beta blockers are contraindicated in asthmatic patients
Of the above choices, nadolol is the one with non-selective beta blocker
activity
Propranolol is another non selective beta blocker
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Research Concepts:
Asthma:
Beta-Blockers:
Choices:
1. Opioid analgesics
2. Anxiolytics
3. Benzodiazepines
4. Anticholinergic agents
Answer: 3 - Benzodiazepines
Explanations:
Benzodiazepines are used to decrease symptoms of alcohol withdrawal
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Research Concepts:
Alcohol Withdrawal:
Choices:
1. Behavioral changes
2. Analgesia
3. Respiratory depression
4. Diarrhea
Answer: 4 - Diarrhea
Explanations:
Morphine can cause severe constipation and most patients require
concomitant laxative therapy
In high doses, morphine can cause apnea.
The side effects of morphine can be reversed with naloxone.
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Research Concepts:
Morphine:
Choices:
1. The condition is associated with an ostium primum ASD
2. There is a cleft mitral valve present
3. Parachute mitral valve may be present
4. Children with partial AV canal defects develop pulmonary hypertension
early and surgery is required soon after diagnosis
Answer: 4 - Children with partial AV canal defects develop pulmonary
hypertension early and surgery is required soon after diagnosis
Explanations:
In partial AV canal defects, pulmonary hypertension is usually absent and
the optimal age of surgery is 2-4 years
In complete AV canal defect, surgery should be performed at 6 months
before pulmonary vascular disease progresses
If severe symptoms are present, surgery is indicated earlier
Cardiac catheterization will reveal an oxygen step up in both right atrium
and right ventricle in complete AV canal defect
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Research Concepts:
Atrioventricular Canal Defects:
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Research Concepts:
Nitrates:
Choices:
1. Cardiac enlargement is seen on an x ray
2. MR does not require any procedure
3. Cardiac catheterization is needed prior to surgery
4. Origin of the RCA from the PA carries has a lower morbidity than the LAD
from the PA
Answer: 3 - Cardiac catheterization is needed prior to surgery
Explanations:
The lower pressure in the RV allows for better myocardial flow and thus
origin of the RCA from the PA is better tolerated.
Cardiac catheterization is not required in all patients.
Critically ill infants can be diagnosed with an ECHO and it suffices.
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Research Concepts:
Anomalous Left Anterior Descending (LAD) Artery:
Choices:
1. Beta blockers
2. ACE inhibitors
3. Alpha blockers
4. Diuretics
Answer: 3 - Alpha blockers
Explanations:
All alpha-blockers have two side effects. They can cause orthostatic
hypotension and a reflex tachycardia.
The orthostatic hypotension is often so severe that many people are not able
to take high doses of alpha-blockers.
Alpha-blockers are best taken at night to avoid the hypotension.
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Research Concepts:
Antihypertensive Medications:
Choices:
1. Age
2. Duration of therapy
3. Type of heparin used
4. Surgical patients
Answer: 1 - Age
Explanations:
There are three factors in addition to longer duration of therapy that is most
strongly associated with the development of HIT
Use of unfractionated heparin rather than low molecular weight heparin is
considered a risk factor
Surgical rather than medical patients are prone to HIT
Female rather than male patients are prone to HIT
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Research Concepts:
Thrombocytopenia, Heparin Induced:
Choices:
1. A patient with history of cardiogenic shock who has new Q waves and
pulmonary edema
2. A trauma patient with hypotension, distended neck veins, and muffled heart
tones
3. A patient with left mainstem artery disease and poor response to IV
dopamine
4. A patient with an anteroseptal myocardial infarction with a new onset of a
cooing, systolic murmur
Answer: 4 - A patient with an anteroseptal myocardial infarction with a new
onset of a cooing, systolic murmur
Explanations:
A balloon pump is most useful to stabilize a patient with a surgically
correctable lesion that is causing heart failure, e.g., a ruptured papillary
muscle with acute mitral regurgitation.
Patients with a new myocardial infarction, in addition to severe, preexisting
cardiac disease, have a poor prognosis.
The balloon pump is not indicated for pericardial tamponade.
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Research Concepts:
Myocardial Infarction, Acute:
Choices:
1. Hypocalcemia
2. Hypophosphatemia
3. Hyponatremia
4. Hyperkalemia
Answer: 2 - Hypophosphatemia
Explanations:
Mild hypophosphatemia is asymptomatic but severe depletion can cause
muscle weakness, hemolytic anemia, and decreased cardiac output
Hypophosphatemia can be seen with chronic alcoholism or refeeding
syndrome
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Research Concepts:
Hypophosphatemia:
Choices:
1. Quinidine
2. Dofetilide
3. Metoprolol
4. Verapamil
Answer: 1 - Quinidine
Explanations:
Quinidine is associated with hemolytic anemia
Dofetilide may cause Torsade de pointes
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Research Concepts:
Quinidine:
Hemolytic Anemia:
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Research Concepts:
Cyanosis:
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Research Concepts:
Aortic Stenosis:
Choices:
1. Provided significant clinical benefit
2. Provided no clinical benefit
3. Had no clinical effect
4. None of the above
Answer: 2 - Provided no clinical benefit
Explanations:
ASA and warfarin reduce cardiovascular morbidity and mortality after MI
when given alone
The Coumadin Aspirin Reinfarction Study (CARS) concluded low, fixed-
dose warfarin combined with low-dose ASA after MI provided no clinical
benefit beyond that achievable with ASA 160 mg alone
The Lancet, Volume 350, Issue 9075, Pages 389-396
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Research Concepts:
Acute Myocardial Infarction:
Aspirin:
Warfarin:
Tap flag to report any problems with this question.
Question 1506: In a patient with asthma and hypertension, the beta-
blocker of choice is:
Choices:
1. Pindolol
2. Propranolol
3. Isoprenaline
4. Timolol
Answer: 1 - Pindolol
Explanations:
Pindolol is a beta-blocker used to treat hypertension
Unlike the other beta blockers is slightly more specific in its actions and
does not affect the bronchi or the pancreas
It also possess intrinsic sympathomimetic activity at low doses which is of
benefit in patients with asthma and hypertension
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Research Concepts:
Asthma:
Hypertension:
Beta-Blockers:
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Question 1507: Which of these agents is associated with cinchonism?
Choices:
1. Digoxin
2. Hydralazine
3. Propranolol
4. Quinidine
Answer: 4 - Quinidine
Explanations:
Quinidine is a class 1 anti arrhythmic agent derived from the bark of
cinchona tree.
Quinidine acts by blocking the fast sodium current and lowers heart rate.
Quinidine is also an inhibitor of cytochrome P450 and can lead to high
concentration of various drugs.
Quinidine can cause cinchonism, which is described as tinnitus, hearing
loss and confusion.
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Research Concepts:
Cinchonism:
Choices:
1. Fire a stapler
2. Apply large nylon suture
3. Insert a foley catheter and inflate balloon
4. Place patient on heart lung machine for repair
Answer: 3 - Insert a foley catheter and inflate balloon
Explanations:
The right ventricle is thin walled and sutures can tear the heart
The safest way to stop bleeding is to place a foley and inflate the balloon
Then a pledget stitch can be placed round the tear
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Research Concepts:
Ventricular Repair, Surgery:
Choices:
1. Trigeminal nerve
2. Right recurrent laryngeal nerve
3. Left recurrent laryngeal nerve
4. Celiac nerve
Answer: 3 - Left recurrent laryngeal nerve
Explanations:
The recurrent (inferior) laryngeal nerve is a branch of the vagus nerve.
The recurrent laryngeal nerve is responsible for laryngeal motor function
and sensation.
It is called the "recurrent" as the branches of the nerve innervate the neck
laryngeal muscles by a prolonged course.
It loops around the arch of aorta near ligamentum arteriosum.
Evolutionarily, this relates to the relation of nerves and branchial arches in
fish.
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Research Concepts:
Recurrent Laryngeal Nerve:
Choices:
1. Skin necrosis
2. Cholestatic jaundice
3. Osteoporosis
4. Anemia
Answer: 1 - Skin necrosis
Explanations:
Skin necrosis due to hypercoagulation can occur during early periods of
warfarin treatment
This is caused by rapid decline of the natural anticoagulant, Protein C
Protein C is also a vitamin K dependent factor that has a shorter half life
than other clotting factors
The other mentioned complications usually occur in long term therapy
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Research Concepts:
Warfarin:
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Research Concepts:
Human Insulin:
Choices:
1. Oxygen
2. Sodium bicarbonate
3. Morphine
4. Furosemide
Answer: 2 - Sodium bicarbonate
Explanations:
In a setting of respiratory acidosis, the patient should be given oxygen,
diuretics and morphine to reduce pulmonary congestion
Bicarbonate is not indicated in respiratory acidosis
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Research Concepts:
Acidosis, Metabolic:
Acidosis, Respiratory:
Choices:
1. Ulcerated ascending aorta
2. Thickened irregular ascending aorta
3. Large mobile fragments in the ascending aorta
4. Large fragment in the arch of aorta
Answer: 3 - Large mobile fragments in the ascending aorta
Explanations:
All the above are related to stroke, but the mobile segments in the aorta are
associated with the highest incidence of stroke.
Palpation of the aorta is not sensitive technique to determine calcification or
plaques in the aorta.
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Research Concepts:
Aortoembolic Stroke:
Choices:
1. Fever and chills
2. Amaurosis fugax
3. Janeway lesions
4. Roth spots
Answer: 2 - Amaurosis fugax
Explanations:
There are many features of infective endocarditis on physical exam. Fever
and chills are present in 90% of patients. A heart murmur is heard in about
7%, and 10% will have evidence of congestive heart failure.
Petechiae, splinter hemorrhage, Osler nodes, Janeway lesions, and Roth
spots are seen in 50% of patients.
Neurologic manifestation may include embolic stroke with focal deficit,
intracerebral hemorrhages, and multiple micro abscesses. Amaurosis fugax
is a presentation of atherosclerotic disease in the carotid artery.
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Research Concepts:
Endocarditis, Infectious:
Choices:
1. Chest x-ray
2. Bronchoscopic lavage
3. Blood cultures
4. Tissue biopsy
Answer: 4 - Tissue biopsy
Explanations:
The definitive diagnosis of nosocomial pneumonia can only be made with
tissue biopsy, but this is rarely ever done
The diagnosis of nosocomial pneumonia is often done based on clinical
history and presentation
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Research Concepts:
Pneumonia, Nosocomial:
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Research Concepts:
TPA Therapy:
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Research Concepts:
Pressure Support:
Mechanical Ventilation:
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Research Concepts:
Lidocaine:
Choices:
1. Aortic arch
2. Carotid bifurcation
3. Brain
4. Atrium
Answer: 2 - Carotid bifurcation
Explanations:
The carotid sinus reflex sends signals to the medulla via the
glossopharyngeal nerve.
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Research Concepts:
Glossopharyngeal Nerve:
Choices:
1. When the pressure settings are alarming
2. When the patient appears to be ready to come off the ventilator
3. To increase their oxygenation before drawing ABG's
4. If the patient has become a DNR status
Answer: 1 - When the pressure settings are alarming
Explanations:
Manually ventilating the patient enables the nurse to evaluate whether the
endotracheal tube is out of position or the patient's airway is blocked
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Research Concepts:
Mechanical Ventilation:
Ventilation, Management:
Choices:
1. Decreased risk of hyperinflation
2. Decreased risk of respiratory acidosis
3. Better results with reduced lung compliance
4. Assists spontaneous breathing
Answer: 1 - Decreased risk of hyperinflation
Explanations:
Pressure controlled ventilation prevents over inflation
It provides lung volumes dependent on lung compliance preventing
hyperinflation and pneumothorax
It is not appropriate with intrinsic pulmonary dysfunction
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Research Concepts:
Pressure Controlled ventilation:
Choices:
1. Alzheimer disease
2. Renal failure
3. Hypovolemia
4. All of the above
Answer: 3 - Hypovolemia
Explanations:
Hypovolemia is a decrease in circulating blood volume
It is a contraindication to the use of PEEP
PEEP compresses the heart and blood vessels decreasing venous return to
the heart resulting in low cardiac output
Alzheimer's and renal failure are not contraindications to PEEP
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Research Concepts:
Positive End-Expiratory Pressure (PEEP):
Hypovolemia:
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Research Concepts:
Aortitis:
Choices:
1. Hypotension
2. Hemoglobinuria
3. Bronchospasm
4. Jaundice
Answer: 4 - Jaundice
Explanations:
Jaundice may present as a chronic sign of hemolytic anemia.
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Research Concepts:
Transfusion Reactions:
Choices:
1. Septic Shock
2. Hypovolemic Shock
3. Neurogenic Shock
4. Cardiogenic Shock
Answer: 4 - Cardiogenic Shock
Explanations:
In cardiogenic shock, the heart simply is not able to pump and this results in
decreased contractility and reduced stroke volume.
Besides low cardiac output, the left ventricular filling pressures are high.
The systemic vascular resistance also increases to compensate for low
blood pressure.
The heart rate is increased and the JVP will always be high because of back
congestion.
Other features of cardiogenic shock include cool peripheries, decreased
urine output, and sweating. In people who bleed, the extremity will also be
cold and there may be diaphoresis but the JVP will also be low. In septic
shock, the extremities will be warm.
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Research Concepts:
Cardiogenic Shock:
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Research Concepts:
Antibiotics:
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Research Concepts:
Pulmonary Artery:
Choices:
1. Left ventricle
2. Pulmonary veins
3. Aorta
4. Peripheral arteries
Answer: 2 - Pulmonary veins
Explanations:
Pulmonary venous pressure is increased with mitral valve stenosis
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Research Concepts:
Mitral Stenosis:
Mitral Stenosis:
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Research Concepts:
Left Ventricular Failure:
Choices:
1. Furosemide
2. Metformin
3. Glipizide
4. Erythromycin
Answer: 1 - Furosemide
Explanations:
Furosemide is a commonly used drug that can mistakenly be given to
patients with sulfa allergy
There are a number of drugs that contain sulfonamides
Another commonly used drug is cotrimoxazole
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Research Concepts:
Sulfa Allergy:
Furosemide:
Choices:
1. Represents electrical impulse originating at the atrioventricular node
2. Normally has duration of 0.11 seconds or less
3. May increase in size with atrial dilation
4. Reflects atrial depolarization
Answer: 1 - Represents electrical impulse originating at the atrioventricular
node
Explanations:
The P wave on an EKG represents an electrical impulse originating from
the sinoatrial node, not the atrioventricular node.
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Research Concepts:
EKG, P wave:
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Cor Pulmonale:
Choices:
1. Trisomy 13
2. Trisomy 18
3. XXY
4. Trisomy 21
Answer: 2 - Trisomy 18
Explanations:
Trisomy 18 is Edward syndrome, which also includes mental deficiency,
ventricular septal defect, and micrognathia.
Trisomy 21 is Down syndrome.
Trisomy 13 is Patau syndrome and includes mental retardation, rocker
bottom feet, polydactyly, nervous system malformations, and cleft lip and
palate.
XXY is Klinefelter syndrome.
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Research Concepts:
Edward Syndrome:
Choices:
1. IL2
2. IL4
3. IL6
4. IL12
Answer: 1 - IL2
Explanations:
Cyclosporine prevents production of IL2 via calcineurin inhibition
Calcineurin is used for induction and maintenance immunosuppression
Adverse effects of cyclosporin include nephrotoxicity, hypertension,
hypertrichosis and hyperkalemia
Hypertrichosis and hirsutism can be reduced by switching to tacrolimus
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Research Concepts:
Cyclosporine:
Choices:
1. Top of the ball
2. Middle of the ball
3. Bottom of the ball
4. Anywhere on the ball
Answer: 2 - Middle of the ball
Explanations:
The correct flow reading is made at the middle of the ball.
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Research Concepts:
Flow Meter:
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Statin Medication:
Myopathy:
Choices:
1. Erythema
2. Seizures
3. Periorbital numbness
4. Methemoglobinemia
Answer: 4 - Methemoglobinemia
Explanations:
Lidocaine toxicities include periorbital numbness and seizures.
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Research Concepts:
Lidocaine:
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Research Concepts:
Bupivacaine:
Choices:
1. The anterior mitral valve leaflet
2. Through into the right atrium
3. Into the septum
4. The right coronary artery
Answer: 3 - Into the septum
Explanations:
These annular abscesses can tunnel through to the septum and produce
heart block
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Research Concepts:
Annular Abscess Formation:
Choices:
1. As bicarbonate
2. As carbaminohemoglobin
3. Dissolved in plasma
4. As carbonic anhydrase
Answer: 1 - As bicarbonate
Explanations:
60% to 70% of carbon dioxide is carried as bicarbonate
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Research Concepts:
Carbon Dioxide Transport:
Choices:
1. Psychological consultation
2. An electroencephalogram
3. Cardiac stress testing
4. Cytomegalovirus testing (CMV)
Answer: 2 - An electroencephalogram
Explanations:
Cardiac transplant recipients are evaluated by a social worker and
psychologists prior to transplant
Physical testing is cardiac catheterization, ECG, stress test, CMV, EBV and
HIV testing
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Research Concepts:
Heart Transplantation:
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Research Concepts:
Femoral Vein Cannulation:
Choices:
1. Metoprolol
2. Vasotec
3. Hydralazine
4. Clonidine
Answer: 4 - Clonidine
Explanations:
Clonidine is a centrally acting agent, can cause salt and water retention
Side effects of clonidine include dry mouth and severe rebound
hypertension if the drug is abruptly stopped
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Research Concepts:
Clonidine:
Choices:
1. Contrast enhanced abdominal MRI/MRA
2. Renal ultrasound
3. Captopril renal scintigraphy
4. Abdominal radiographs
Answer: 1 - Contrast enhanced abdominal MRI/MRA
Explanations:
The clinical history raises concern for renal artery stenosis (RAS) as the
etiology for the bruit and hypertension.
RAS is potentially diagnosed with US but more easily and confidentally
diagnosed with CT or MR angiography. US is much more operator
dependent.
RAS should not be confused with renovascular hypertension. The renal
artery may be narrowed without contributing to hypertension. The
radionuclide exam with an ACEI is best for making this assessment,
perhaps prior to decision to perform an intervention (plasty, stent, surgery).
In this age group, the most common cause for RAS is atherosclerosis, but in
a younger age group fibromuscular dysplasia would also be considered.
FMD classically causes a beaded appearance to the involved vessel.
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Research Concepts:
Renal Artery Stenosis:
Choices:
1. Multiple medications
2. Reduced renal function
3. Gastric alkalinity
4. Reduced total body water
Answer: 1 - Multiple medications
Explanations:
More than 50% of elderly individuals treated with multiple medications
experience a variety of adverse side effects.
Adverse side effects include short term, long term, and idiosyncratic
reactions that affect cognition, gait, and the bodily functions.
It is estimated that polypharmacy affects more than 55% of elderly patients
and causes 8-10% of all adverse drug reactions.
Elderly patients also may have renal insufficiency, poor nutrition, liver
disease, and arthritis. These are factors that can increase the severity of drug
side effects.
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Research Concepts:
Perioperative Adverse Drug Reaction:
Choices:
1. Initiation of bypass
2. Termination of bypass
3. During intracardiac procedure
4. During flushing of vein grafts with cardioplegia
Answer: 1 - Initiation of bypass
Explanations:
The highest risk of embolism is during initiation of CPB
When the cold prime solution enters the patient at the onset of CPB, cold
gases that are dissolved in the prime, air bubbles out in the warm patient
and cause embolism
That is why there should not be a gradient >10'C between the patient and
CPB circuit
In addition, the temperature should be gradually lowered
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Research Concepts:
Cardiopulmonary Bypass:
Choices:
1. Doxycycline
2. Ceftriaxone
3. Clindamycin
4. Erythromycin
Answer: 2 - Ceftriaxone
Explanations:
Cross reactivity between penicillin and cephalosporins is actually less than
7%.
Patients who had anaphylactic reaction after penicillin use should not be
given cephalosporins
Penicillin is not related to tetracycline and macrolides so they can be given
safely for penicillin allergic patients.
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Research Concepts:
Penicillin Allergy:
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Cyanosis:
Choices:
1. Central cyanosis
2. Loud P2
3. Right sided fourth heart sound
4. Continuous murmur
Answer: 4 - Continuous murmur
Explanations:
Classic features of Eisenmenger syndrome include central cyanosis,
clubbing, loud P2, right sided fourth heart sound, and single S2.
Other features include an elevated A wave in CVP tracing and a short soft
systolic murmur.
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Research Concepts:
Eisenmenger Syndrome:
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Research Concepts:
Cardiogenic Shock:
Choices:
1. Alpha receptors
2. Beta receptors
3. Cholinergic receptors
4. Nicotinic receptors
Answer: 1 - Alpha receptors
Explanations:
Norepinephrine is a catecholamine that primarily acts on alpha-receptors.
The resulting action is an increase in blood pressure and systemic vascular
resistance.
Norepinephrine is made from dopamine by the enzyme dopamine B-
hydroxylase.
Deficiency of norepinephrine has been linked to depression.
In the intensive care unit setting norepinephrine is used a pressor agent. At
very high doses, it can lead to limb ischemia and even gangrene.
Norepinephrine is frequently used to treat shock states and has a survival
benefit over dopamine.
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Inotropes And Vasopressors:
Choices:
1. They can cause cellulitis
2. They can cause toxic shock syndrome
3. They are usually associated with a fever
4. They often release an endotoxin
Answer: 4 - They often release an endotoxin
Explanations:
Staphylococcus is a common cause of cellulitis.
S. aureus sometimes causes toxic shock syndrome, which can be fatal if not
promptly treated.
S. aureus is a gram-positive organism that releases exotoxins, not
endotoxins.
Most staphylococcus infections are associated with a fever.
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Research Concepts:
Staphylococcus Aureus:
Choices:
1. Peas and beans
2. Salmon
3. Broccoli and avocado
4. Coffee
Answer: 3 - Broccoli and avocado
Explanations:
Foods to be avoided with warfarin therapy include green leafy vegetables,
broccoli, and avocado.
These foods tend to inhibit the actions of warfarin.
One should also avoid alcohol.
There are many oriental herbs that can affect levels of warfarin.
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Research Concepts:
Anticoagulation:
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Prothrombin Time:
Choices:
1. Increased heart rate
2. Increased systemic vascular resistance
3. Increased blood pressure
4. Decreased wedge pressure
Answer: 4 - Decreased wedge pressure
Explanations:
There is an increase in wedge pressure during intubation.
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Research Concepts:
Intubation, Anesthesia:
Choices:
1. Atherosclerosis
2. Tuberculosis
3. Syphilis
4. Congenital defects
Answer: 1 - Atherosclerosis
Explanations:
Arteriosclerotic disease is the most common cause of thoracic aneurysms.
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Aortic Arch Aneurysm:
Choices:
1. Pneumothorax
2. Ascending aortic dissection
3. Uremic pericarditis
4. Rupture of pericardial cyst
Answer: 2 - Ascending aortic dissection
Explanations:
Trauma more commonly causes aortic rupture, but can also cause aortic
dissection in rare instances. Dissection of the ascending aorta can result in
aortic wall rupture, hemopericardium, and tamponade. Other complications
include occlusion of the coronary ostia and severe aortic insufficiency.
Patients with aortic dissection typically present with sudden onset of severe
and tearing chest pain. Thoracic aortic dissection should be considered in
all patients with chest pain that radiates to the back and migrates to the left
chest and flanks.
Neurologic deficits are also common. Syncope may result from increased
vagal tone, hypovolemia, or arrhythmias.
Cardiac manifestations of aortic dissection include tamponade, superior
vena cava syndrome, wide pulse pressure, pulse deficits, and absent pulses.
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Research Concepts:
Dissection, Aortic:
Dissection, Aortic:
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Question 1558: Tolerance develops to one of the following medications:
Choices:
1. Nitrates
2. Nimodipine
3. Diltiazem
4. Propranolol
Answer: 1 - Nitrates
Explanations:
Tolerance develops easily for nitrate drugs because of depletion of NO
Repeated use during the day results in depletion of NO
The best method to overcome this problem is to use the drug in long
intervals
There is no tolerance that develops to calcium channel blockers
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Nitrates:
Choices:
1. 1 month
2. 1 week
3. 3-6 months
4. For life
Answer: 3 - 3-6 months
Explanations:
Anticoagulation therapy is generally continued for 3-6 months.
Patients with factor C or S deficiency may need long-term anticoagulation.
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Pulmonary Embolism:
Choices:
1. The heart rate response to exercise will be abnormal
2. The patient will have resting bradycardia
3. The patient's exercise capacity will not be reduced
4. There is sympathetic but not parasympathetic innervation of the heart
Answer: 1 - The heart rate response to exercise will be abnormal
Explanations:
After heart transplant, the heart is not innervated
Resting tachycardia is usual
Response to exercise is limited, which in turn limits exercise potential
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Research Concepts:
Heart Transplant:
Choices:
1. A patient who had a myocardial infarction 10 months ago.
2. A patient with a potassium of 2.4, who is on diuretic therapy.
3. A patient with an ongoing pneumonia.
4. A patient with new onset glycosuria and polyuria.
Answer: 1 - A patient who had a myocardial infarction 10 months ago.
Explanations:
Perioperative MI is associated with a 40-70 percent risk of death.
Preoperative risk factors for death include presence of an S3, JVP
distension, age greater than 70, PVCs, MI within past 6 months, and
presence of symptomatic aortic stenosis.
Other risk factors for death include history of diabetes, preoperative Cr >
2.0, and low potassium.
An exercise stress test is the standard method for detection of myocardial
ischemia.
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Preoperative Evaluation And Management:
Choices:
1. Aspirin
2. Cyanide
3. Low molecular weight heparin
4. Warfarin
Answer: 4 - Warfarin
Explanations:
Warfarin was initially used as rat poison and later found be an effective oral
anticoagulant.
Resistance to warfarin effects is now seen in rats.
Dosage of warfarin must be monitored and adjusted using INR.
There is risk of hemorrhage even with monitoring.
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Research Concepts:
Warfarin:
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Anticoagulation:
Choices:
1. 1 mm
2. 5 mm
3. 10 mm
4. Any decline
Answer: 1 - 1 mm
Explanations:
Exercise testing is sometimes used to screen patients with coronary artery
disease.
During the tread mill test, if there is a decline of 1 mm or more, one should
suspect coronary artery disease.
Exercise testing is more predictable in postmenopausal females, men over
the age of 40, and those who have hypertension.
If the exercise test is positive, then the patient may be sent for an
angiogram.
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Treadmill Stress Testing:
Choices:
1. Uremia
2. Malignancy
3. Liver disease
4. Diabetes
Answer: 4 - Diabetes
Explanations:
While many factors increase risk of dehiscence, diabetes on its own is not a
risk factor
Common risk factors for wound dehiscence include age, hypoalbuminemia,
obesity, uremia, malignancy and liver disease
Additionally smoking and use of blood thinners can also increase the risk
Chemotherapeutic drugs are a common cause of wound dehiscence
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Wound Dehiscence:
Choices:
1. Sharp, piercing pain radiating bilaterally to the thorax or arms and typically
occuring after movement, coughing, or sneezing, may be associated with
osteoarthritis
2. Substernal pain with a positive Hamman sign may result from trauma,
asthma, or esophageal rupture
3. Short episodes of sharp precordial pain, resolving with rest and shallow
respirations, are typical of pericarditis
4. The rub of pericarditis can be intermittent and have of up to three
components
Answer: 3 - Short episodes of sharp precordial pain, resolving with rest and
shallow respirations, are typical of pericarditis
Explanations:
Precordial catch syndrome is characterized by short, sharp, anterior chest
wall pain that resolves with rest and shallow respirations.
Pericardial pain is usually substernal, severe, acute in onset, and may
radiate into the back or neck. It is lessened by leaning forward and
worsened by coughing and breathing. EKG often shows diffuse ST
elevation.
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Chest Pain:
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Shock:
Choices:
1. Lactate dehydrogenase
2. Creatine kinase
3. Troponin
4. C-reactive protein
Answer: 3 - Troponin
Explanations:
Troponin levels start to peak in the first 24 hours after an MI.
Troponins are most sensitive for an MI.
Lactate dehydrogenase and C-reactive protein are not very specific markers
for an MI.
CPK levels usually peak between 24-48 hours.
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Myocardial Infarction, Acute:
Choices:
1. Atrial septal defect
2. Ventricular septal defect
3. Tetralogy of fallot
4. Coarctation
Answer: 1 - Atrial septal defect
Explanations:
ASD is the most frequent CHD discovered in adults.
Usually, the ASD can be closed in adults but these patients have a high
incidence of arrhythmias.
Pulmonary hypertension does develop in a few patients but takes decades.
ASD patients do not develop endocarditis.
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Atrial Septal Defect:
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Opioids:
Constipation:
Choices:
1. 4 mg per dL
2. 8 mg per dL
3. 12 mg per dL
4. 15 mg per dL
Answer: 2 - 8 mg per dL
Explanations:
Normal serum calcium is 8 mg per dL.
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Calcium:
Choices:
1. Patient on hirudin
2. Patient receiving heparin flushes to keep an IV catheter patent
3. Patient with a heparin-coated stent
4. Patient on low molecular weight heparin for DVT
Answer: 1 - Patient on hirudin
Explanations:
Any form of heparin can cause heparin induced thrombocytopenia.
Hirudin is not a form of heparin.
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Research Concepts:
Thrombocytopenia, Heparin Induced:
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Vitamin E:
Choices:
1. Circumflex from RCA
2. Lad from the pulmonary artery
3. Lad from non coronary sinus
4. LAD from RCA
Answer: 4 - LAD from RCA
Explanations:
LAD from the RCA is the most common anomaly seen in TOF patients.
The anterior descending arises from the RCA in 5% of TOF patients.
It courses the anterior wall of the right ventricular outflow tract towards a
variable distance towards the pulmonary valve.
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Tetralogy Of Fallot:
Choices:
1. Gore-Tex is a type of polytetrafluoroethylene (PTFE), specifically ePTFE,
implanted in humans since 1971
2. It was first used for human vascular grafts
3. There is limited vascular ingrowth or integration into surrounding tissues
4. ePTFE consists of PTFE fibrils that are not connected
Answer: 4 - ePTFE consists of PTFE fibrils that are not connected
Explanations:
Gore-Tex is a brand of polytetrafluoroethylene used in humans since 1971.
Initially it was used for vascular graft and later facial plastic surgery.
ePTFE consists of fibrils that are woven into a mesh.
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Expanded Polytetrafluoroethylene:
Choices:
1. Increased venous capacitance
2. Decreased systemic vascular resistance
3. Increased cardiac output
4. Warm dry skin
Answer: 3 - Increased cardiac output
Explanations:
Patients with neurogenic shock are usually hypotensive with warm dry skin
The loss of sympathetic tone results in increased venous capacitance and
bradycardia though tachycardia may be an initial feature.
Neurogenic shock can be present with incomplete or complete lesions of
the spinal cord
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Research Concepts:
Shock, Neurogenic:
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Research Concepts:
Peripheral Vascular Resistance:
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Morphine:
Fentanyl:
Choices:
1. Trauma
2. Cancer
3. Heart disease
4. Stroke
Answer: 3 - Heart disease
Explanations:
Heart disease is the leading cause of death in men in the United States.
Cancer is the second most common cause of death in men.
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Research Concepts:
Coronary Artery Disease:
Cause of Death:
Choices:
1. Discuss your concerns with the individual's family
2. Confirm concerns with the individual before reporting
3. No action is needed if the adult caretaker is competent
4. The concern must be reported to the appropriate state agency
Answer: 4 - The concern must be reported to the appropriate state agency
Explanations:
Most states require that suspected neglect or abuse of the elderly be
reported to the appropriate state agency.
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Research Concepts:
Elder Abuse:
Choices:
1. Beta blockers
2. Nitroprusside
3. Sublingual nifedipine
4. Furosemide
Answer: 2 - Nitroprusside
Explanations:
Severe hypertension can be treated with beta blockers or vasodilators
Beta blockers are contraindicated in asthmatics
Nitroprusside would be the drug of choice
Sublingual nifedipine was once a favored method for lowering blood
pressure but is no longer used
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Research Concepts:
Hypertension:
Asthma:
Choices:
1. Nitrates
2. Calcium Channel Blockers
3. Anticholinergic therapy
4. Emergency bypass
Answer: 1 - Nitrates
Explanations:
Spasm in the distal microvascular bed does not respond to nitrates.
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Research Concepts:
Percutaneous Transluminal Coronary Angioplasty:
Choices:
1. Mortality
2. Reinfarction
3. Progression to coronary artery bypass grafting
4. All of the above
Answer: 4 - All of the above
Explanations:
Stenting improved 6-month cardiac free events by 15% when compared
with PTCA alone
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Research Concepts:
Acute Myocardial Infarction:
Intracoronary Stents:
Choices:
1. Interstitial
2. Intracellular
3. Extracellular
4. Intravascular
Answer: 1 - Interstitial
Explanations:
Hemodilution dilutes plasma proteins and decreases colloid osmotic
pressure and also increases capillary permeability.
This results in accumulation of extravascular fluid. There is increased
pulmonary interstitial fluid without a rise in left atrial pressure.
There is also increased tissue and peripheral edema.
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Research Concepts:
Cardiopulmonary Bypass:
Choices:
1. Patient
2. Patient's court-appointed guardian
3. Patient's parents
4. Patient's spouse
Answer: 1 - Patient
Explanations:
Mentally ill patients do not lose their right for making health decisions if
legally competent. Most people with a diagnosed mental illness are legally
competent, and this presumption should always be made prima facie
Remember that competence is a legal and not a medical designation
The wishes of the parents (or even of the physician are not relevant)
As a legally competent individual, the patient is unlikely to have a court-
appointed guardian
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Research Concepts:
Informed Consent:
Mental Illness:
Choices:
1. Accommodation
2. Hypertension
3. Pupillary constriction
4. Tachycardia
Answer: 4 - Tachycardia
Explanations:
Trimethaphan is a ganglionic blocker
It is administered during surgery to control hypotension and to minimize
blood loss
Parasympathetic stimulation of the heart causes bradycardia; removal of
this would result in tachycardia
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Research Concepts:
Trimethaphan:
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Research Concepts:
Antiarrhythmic Medication:
Choices:
1. B-cells
2. T-cells
3. Macrophages
4. Eosinophils
Answer: 3 - Macrophages
Explanations:
Fatty streaks contain macrophages
B-cells manufacture immunoglobulins
T-cells are involved in cellular immunity and humeral immunity
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Research Concepts:
Atherosclerosis:
Choices:
1. 1%
2. 8%
3. 15%
4. 50%
Answer: 3 - 15%
Explanations:
The majority of patients who suffer blunt trauma to the thoracic aorta die at
the site of trauma. Exsanguinating bleeding is common.
Among those who are brought to the emergency room, expedient surgery
salvages about 15% of patients.
Complications of the thoracic aorta include paraplegia, stroke, renal failure,
and bowel ischemia.
Many of these individuals have other organ system damage which leads to a
higher morbidity.
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Research Concepts:
Aorta, Trauma:
Choices:
1. Excessive long chain fatty acids
2. Excessive nitrogenous amino acids
3. Excessive carbohydrates
4. Excessive cholesterol
Answer: 3 - Excessive carbohydrates
Explanations:
Remember, CO2 levels may increase with carbohydrate feedings.
Low carbohydrates and high fat nutrition are required to decrease CO2
production.
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Research Concepts:
Ventilator Weaning:
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Research Concepts:
Sotalol:
Choices:
1. Uncontrolled hypertension
2. Marfan
3. Penetrating trauma
4. Motor vehicle accident
Answer: 4 - Motor vehicle accident
Explanations:
When neither death nor surgery follows acute traumatic aortic transection,
the disruption in at least part of the aortic circumference at the level of the
ligamentum, allows an extravasation of blood into the periaortic area
This blood may remain in communication with the aorta and form a
pulsating hematoma contained by adventitial tissue
Because of the increased wall stress, the false aneurysm begins to enlarge
and form a typical thoracic aneurysm
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Research Concepts:
Thoracic Aorta Aneurysm:
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Research Concepts:
Kussmaul Sign:
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Research Concepts:
Labetalol:
Drug Metabolism:
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Research Concepts:
Atelectasis:
Choices:
1. Coronary artery bypass graft (CABG) first, then lung resection, then
protamine
2. Lung resection first, then CABG, then protamine
3. CABG first, then protamine followed by lung resection
4. Lung resection, then protamine followed by CABG
Answer: 3 - CABG first, then protamine followed by lung resection
Explanations:
Coronary artery bypass grafting (CABG) is generally done first, then
protamine is given and, finally, the lung mass is resected.
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Research Concepts:
Lung Mass:
Choices:
1. Tuberculosis
2. Viral
3. Bacterial
4. Myocardial infarction
Answer: 1 - Tuberculosis
Explanations:
Tuberculosis is the most common cause of constrictive pericarditis
wordwide
In the U.S. the most common causes, in order, are idiopathic, postoperative,
and radiation
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Research Concepts:
Constrictive Pericarditis:
Tuberculosis:
Choices:
1. Hypomagnesemia
2. Aortic valve stenosis
3. Hyperkalemia
4. Mitral valve stenosis
Answer: 1 - Hypomagnesemia
Explanations:
Hypomagnesemia is associated with the onset of PVCs
Asymptomatic PVCs do not require treatment
The drug of choice for treatment of symptomatic PVCs is lidocaine
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Research Concepts:
Premature Ventricular Contractions:
Hypomagnesemia:
Choices:
1. A 65 year old male with a deep venous thrombosis after knee replacement
2. A 72 year old female with a pulmonary embolism after abdominal
hysterectomy
3. A 55 year old male with a pulmonary embolism and gastrointestinal
bleeding after CABG
4. A 62 year old male with a deep venous thrombosis after radical
prostatectomy
Answer: 3 - A 55 year old male with a pulmonary embolism and
gastrointestinal bleeding after CABG
Explanations:
The patient with gastrointestinal bleeding has a contraindication to
anticoagulation and should be treated with IVC filter.
The most common indication for IVC filter placement is diagnosis of DVT
or PE in someone who has a contraindication for anticoagulation. This
accounts for 38-77% of IVC filter placements.
Anticoagulation contraindications include bleeding diathesis, active internal
bleeding, hemorrhagic stroke, major or multiple surgery or trauma, recent
neurosurgical procedures or other intracranial neoplasm, pregnancy, poor
patient compliance with medications, or a patient with unsteady gait or
tendency to fall,
Additional indications for IVC filter placement, in those without
contraindications for anticoagulation, include anticoagulation failure (PE
post heparin), and patients with free-floating iliocaval or pelvic DVT. It can
also be placed as part of PE prophylaxis in patients with high risk of DVT
or high risk of morbidity from PE (pulmonary hypertension, poor cardiac
reserve, cancer and certain trauma patients).
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Research Concepts:
Vascular Filter, Inferior Vena Cava:
Choices:
1. Lactate
2. pH
3. PaCO2
4. HCO3
Answer: 1 - Lactate
Explanations:
Standard ABG reports pH, PaCO2, PaO2, HCO3, O2 saturation, and base
excess.
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Research Concepts:
Arterial Blood Gas:
Choices:
1. S3 gallop
2. MI 2 months ago
3. Age > 70
4. Intermittent run of 2-3 PVCs
Answer: 4 - Intermittent run of 2-3 PVCs
Explanations:
PVCs are a relatively common occurrence where the heartbeat is initiated
by the ventricles rather than the SA node
A PVC can be perceived as a skipped beat as a palpitation in the chest
PVCs usually do not pose any danger and most are asymptomatic
PVCs is more frequently in elderly, after ischemia and myocarditis
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Research Concepts:
Premature Ventricular Contraction:
Arrythmias:
Choices:
1. Aortic coarctation
2. Aortic stenosis
3. Cardiac hypertrophy
4. Pulmonary fibrosis
Answer: 1 - Aortic coarctation
Explanations:
Aortic coarctation is characterized by upper extremity hypertension
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Research Concepts:
Aortic Coarctation:
Choices:
1. Water solubility
2. Weak acidity
3. Lipid solubility
4. Weak alkalinity
Answer: 3 - Lipid solubility
Explanations:
Methohexital is lipid soluble and redistributes rapidly from the serum into
adipose tissue.
It is a barbiturate derivative used for anesthesia without analgesia.
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Research Concepts:
Methohexital:
Choices:
1. Administer benzodiazepines
2. Administer IV beta-blocker
3. Administer IV ACE inhibitor
4. Repeat cardiac enzymes
Answer: 2 - Administer IV beta-blocker
Explanations:
The patient is having a non-ST elevation myocardial infarction and a beta-
blocker should be given due to their effect of reducing myocardial oxygen
demand and ventricular wall tension and have been shown to decrease
mortality
Initial therapy for acute coronary syndrome is morphine, oxygen, aspirin
and nitrates as well as anticoagulation in NSTEMI
Cardiac enzymes are usually repeated after 6 to 8 hours
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Research Concepts:
Myocardial Infarction, Acute:
Choices:
1. Presents with diastolic murmur
2. Most common symptom is dyspnea
3. Population most at risk is age > 60
4. Rheumatic fever is the leading cause
Answer: 3 - Population most at risk is age > 60
Explanations:
Mitral valve stenosis usually occurs between age 20 to 40
The most common cause is rheumatic fever
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Research Concepts:
Mitral Stenosis:
Choices:
1. Benzodiazepines
2. Vecuronium
3. Barbiturates
4. Baclofen
Answer: 2 - Vecuronium
Explanations:
Vecuronium is a competitive antagonist for acetylcholine at the
neuromuscular junction.
It is non-depolarizing and can be reversed by cholinesterase inhibitors
including pyridostigmine, neostigmine, and edrophonium.
It is approximately 1/3 more potent than pancuronium but slightly shorter
acting but duration of action increases with increasing dose.
It is useful to prevent patients from fighting mechanical ventilation.
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Research Concepts:
Ventilator Management:
Vecuronium:
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Research Concepts:
Protamine:
Choices:
1. Angina
2. Dyspnea
3. Syncope
4. Arrhythmias
Answer: 1 - Angina
Explanations:
It is important to know all the symptoms and signs of mitral stenosis, mitral
regurgitation, aortic stenosis, and aortic regurgitation. The first symptom in
aortic stenosis is usually angina. Syncope is the second symptom and
dyspnea is the third symptom.
Surgery is done for patients who are symptomatic, for patients who have a
peak pressure gradient of 50 mmHg, and for patients who are asymptomatic
but have severe stenosis.
These patients need a graded exercise test, which, if positive, indicates
surgery. If surgery is not done, the right atrial pressure will increase and
hepatomegaly will result. This is the end stage of aortic stenosis.
On an x-ray, calcium may be seen in the left ventricular silhouette. Post
stenotic aortic dilatation may be visible, as well.
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Research Concepts:
Aortic Stenosis:
Choices:
1. The patient should be told that he should have no problems
2. The patient should be advised that he should discuss this with his physician
3. The patient should be informed that the energy required for sexual activity
is the same as walking at 3 to 4 miles per hour
4. The patient should be referred to a psychologist
Answer: 3 - The patient should be informed that the energy required for
sexual activity is the same as walking at 3 to 4 miles per hour
Explanations:
The cardiac rehab therapist should be comfortable in discussing the cardiac
requirements for sexual activity
Sexual intercourse requires 3 to 4 METS, about the same as walking 3 to 4
miles per hour
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Research Concepts:
Sexual Intercourse:
Cardiac Rehabilitation:
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Research Concepts:
Morphine:
Choices:
1. Obtain a stat chest x-ray
2. Administer nitroglycerin
3. Perform a stat echocardiogram
4. Perform an emergency cardiac catheterization
Answer: 2 - Administer nitroglycerin
Explanations:
Initial treatment of patients with an acute MI includes supplemental
oxygen, nitroglycerin, aspirin, and morphine (for pain relief).
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Research Concepts:
Myocardial Infarction:
Choices:
1. Less than 150 mg/dL
2. Less than 100 mg/dL
3. Less than 70 mg/dL
4. Less than 50 mg/dL
Answer: 3 - Less than 70 mg/dL
Explanations:
The American Heart Association recommends LDL to be lower than 70 in
high risk patients
In average risk patients, normal is <130 mg/dL
Moderate elevation is 130 to160 mg/dL
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Research Concepts:
Hyperlipidemia:
Choices:
1. Tuberculosis
2. Idiopathic
3. Post-surgical
4. Parasites
Answer: 1 - Tuberculosis
Explanations:
Tuberculosis is the most common cause of constrictive pericarditis
worldwide
Idiopathic causes are the second most common cause
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Research Concepts:
Constrictive Pericarditis:
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Research Concepts:
Cardiopulmonary Physiology:
Choices:
1. Austin-Flint murmur
2. Corrigan's pulse
3. De Musset sign
4. Delayed carotid pulse
Answer: 4 - Delayed carotid pulse
Explanations:
Aortic regurgitation has many features. The typical diastolic murmur is best
heard with the patient leaning forward.
Austin Flint murmur, Corrigan pulse Musset sign, Quincke sign, and Muller
signs are prominent some patients with chronic aortic reguritation.
Traube sign is presence of loud pistol shots over the femoral arteries.
Delayed carotid pulsations are a feature of aortic stenosis.
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Research Concepts:
Aortic Regurgitation:
Choices:
1. Administration of heparin
2. Embolectomy under local anesthesia
3. Endovascular stenting
4. Placement of a vena cava filter
Answer: 2 - Embolectomy under local anesthesia
Explanations:
Emboli from the heart are not uncommon in patients with congestive heart
failure.
The ideal treatment for this patient is an embolectomy under local
anesthesia.
The patient is not a candidate for general anesthesia and is at high risk for
death.
Some surgeons will attempt a Fogarty embolectomy if the patient is too
unstable for an angiogram.
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Research Concepts:
Thromboembolism:
Choices:
1. Heart rate >100bpm
2. Recent surgery
3. Hemoptysis
4. Tachypnea
Answer: 4 - Tachypnea
Explanations:
The Wells Criteria was introduced to help identify patients at risk for a
pulmonary embolus.
The Wells Criteria include a prior history of PE, HR > 100, recent surgery,
clinical signs of DVT, hemoptysis, and a recent cancer.
Wells Criteria generally apply to younger patients without co-morbidity.
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Research Concepts:
Pulmonary Embolism:
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Research Concepts:
Blood Volume:
Choices:
1. 100 mg per dL
2. 120 mg per dL
3. 150 mg per dL
4. 200 mg per dL
Answer: 1 - 100 mg per dL
Explanations:
LDL should be lower than 100 mg per dL with coronary heart disease
Optimal goal of LDL less than 70 mg per dL in high risk
Triglycerides should be lowered to < 200 mg/dL and non HDL cholesterol
should be lowered to <130 mg/dL
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Research Concepts:
Coronary Artery Disease:
Choices:
1. Hypertension
2. Hyperkalemia
3. Myalgias
4. Paresthesias
Answer: 3 - Myalgias
Explanations:
HMG Co-A reductase inhibitors cause myalgias in 9 to 20% of patients
Rhabdomyolysis is rare
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Research Concepts:
HMG-CoA Reductase Inhibitors:
Choices:
1. Atrial septal defect
2. Aortic insufficiency
3. Aortic stenosis
4. Mitral regurgitation
Answer: 1 - Atrial septal defect
Explanations:
Valvular heart lesions are more commonly predisposed to the development
of infective endocarditis
Atrial septal defect is not a risk factor for infective endocarditis
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Research Concepts:
Endocarditis, Infectious:
Choices:
1. 2 mm ST elevation in V3R
2. 2 mm ST elevation in V3
3. 3 mm ST elevation in aVR
4. 3 mm ST elevation in V1R
Answer: 1 - 2 mm ST elevation in V3R
Explanations:
Patients with an inferior wall MI should have a right sided ECG
Right sided infarction shows greater than 1 mm of ST elevation in V3R or
V4R
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Research Concepts:
Right Ventricular Infarction:
Choices:
1. No showers for 1 week
2. Avoid air travel for one month
3. Never use a microwave oven again
4. Avoid heavy lifting with the implantation side arm for 1 week after the
surgery
Answer: 4 - Avoid heavy lifting with the implantation side arm for 1 week
after the surgery
Explanations:
Post-operative instructions include this information.
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Research Concepts:
Pacemaker, Surgery:
Choices:
1. Acute myocardial infarction
2. Mitral stenosis
3. Congestive heart failure
4. Deep venous thrombosis
Answer: 4 - Deep venous thrombosis
Explanations:
Embolic from the heart are the major cause of embolic strokes
Emboli usually result after an MI, mitral stenosis, congestive heart failure,
dilated cardiomyopathy and carotid artery disease.
Atrial fibrillation continues to be the most common causes of embolic
stroke
DVT will only cause an embolic stroke if there is a right to left shunt.
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Research Concepts:
Embolic Stroke:
Choices:
1. Echocardiogram
2. Stress test
3. Coronary angiogram
4. ECG
Answer: 1 - Echocardiogram
Explanations:
In a young patient with aortic stenosis, there is a low chance of coronary
artery disease and thus an echo is sufficient to make the diagnosis.
In elderly patients with AS, there is always the chance that coronary disease
may be present and thus, a coronary angiogram is warranted.
Radionuclide tests are helpful for coronary patients but are risky in patients
with aortic stenosis.
Cardiac catheterization most accurately measures the gradient across the
aortic valve.
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Research Concepts:
Aortic Stenosis:
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Research Concepts:
Hypotension:
Choices:
1. Withdrawal of the catheter
2. Insertion of the catheter
3. Upon insertion and withdrawal of the catheter
4. None of the above
Answer: 1 - Withdrawal of the catheter
Explanations:
Suction should occur on withdrawal of the catheter when performing
tracheal suctioning
Glove, face mask and eye protection should be worn during the procedure
Sterile technique should be observed when performing the procedure
If ventilated, the patient should be hyper oxygenated/hyperventilated before
and after the procedure
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Research Concepts:
Nasotracheal Suctioning:
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Research Concepts:
Opioid Toxicity:
Choices:
1. Digoxin
2. Nitroglycerin
3. Verapamil
4. Propranolol
Answer: 2 - Nitroglycerin
Explanations:
Nitrates result in rapid vasodilatation and vascular headache
Acetaminophen might help if administered before taking nitrates
The other short coming of nitrates is tolerance with repeated use
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Research Concepts:
Nitroglycerin:
Choices:
1. Blood pressure and pulse rate
2. Hydration status mucus membranes
3. Urine output
4. Nutritional status
Answer: 3 - Urine output
Explanations:
Urine output is vital information used to assess hydration status.
Blood pressure and pulse rate can be misleadingly normal.
Mucus membranes could dry out due to other reasons such as medications
or NPO status.
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Research Concepts:
Fluid Management:
Choices:
1. Venography
2. Duplex compression ultrasound
3. Venous plethysmography
4. Magnetic resonance angiography (MRA)
Answer: 2 - Duplex compression ultrasound
Explanations:
Compression ultrasound with color doppler is a very sensitive and specific
modality for the diagnosis of a lower extremity DVT.
The technique is portable, cheap, and readily available.
The study can be accomplished within minutes at the bedside.
The exam is more sensitive for DVT in the thigh and popliteal areas and
less sensitive in the lower leg. Fortunately, the DVTs most likely to
embolize to the lungs are those in the thigh and popliteal areas.
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Research Concepts:
Deep Vein Thrombosis:
Choices:
1. Left basilar rales
2. Whispered pectoriloquy on left side
3. Tracheal deviation to the right
4. Hyperresonance to percussion on right side
Answer: 4 - Hyperresonance to percussion on right side
Explanations:
Pneumothorax is associated with hyperresonance with percussion as well as
decrease breath sounds on the affected side
Whispered pectoriloquy is increased volume of whisper heard with
stethoscope and is associated with consolidation in pneumonia
If there is a left tension pneumothorax, the trachea may be deviated toward
rightward
Rales are caused by fluid in the alveoli
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Research Concepts:
Pneumothorax:
Choices:
1. Preventing absorption
2. Increasing excretion
3. Altering them into harmless fatty acids
4. Reduce liver secretion of triglycerides
Answer: 4 - Reduce liver secretion of triglycerides
Explanations:
The omega-3 fatty acids in fish oil decrease triglyceride levels in the body
by reducing the liver secretion of triglycerides.
Adverse effects include eructation, infection, flu-like syndrome, dyspepsia,
taste perversion, back pain, pain, rash, and angina pectoris.
They can increase ALT without increasing AST.
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Research Concepts:
Omega-3 Fatty Acids:
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Research Concepts:
Cardiac Contusion:
Choices:
1. 5 mmHg
2. 10 mmHg
3. 20 mmHg
4. 30 mmHg
Answer: 3 - 20 mmHg
Explanations:
Effective CPR should create a coronary perfusion pressure of at least 20
mmHg.
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Research Concepts:
Cardiopulmonary Resuscitation:
Choices:
1. 2 hours
2. 4 hours
3. 6 hours
4. 8 hours
Answer: 1 - 2 hours
Explanations:
It is considered safe to proceed with surgery six hours after formula or milk.
Infants can breast feed 4 hours before surgery.
Clear liquids are allowed up to 2 hours before surgery.
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Research Concepts:
Preoperative Evaluation And Management:
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Research Concepts:
Hepatitis B:
Choices:
1. It binds to the receptor and produces no reaction
2. It causes an enzyme reaction
3. It binds to the receptor and mimics the agonist
4. It does not require a receptor and diffuses easily across the lipid bilayer
Answer: 1 - It binds to the receptor and produces no reaction
Explanations:
An agonist is receptor specific. It binds then creates a reaction.
An antagonist will bind, will not cause a reaction, and will prevent the
agonist from binding.
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Research Concepts:
Cellular Receptor:
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Research Concepts:
Ventricular Septal Defect:
Choices:
1. Labetalol
2. Aspirin
3. Norepinephrine
4. Nitroglycerin
Answer: 4 - Nitroglycerin
Explanations:
Nitroglycerin is widely used in medicine to dilate the coronary vessels to
treat angina or chronic heart failure.
Nitroglycerin paste should be removed at night to allow the body to restore
its responsiveness. This phenomenon of tachyphylaxis is quiet common
with nitroglycerin.
Nitroglycerin vasodilates blood vessels by increasing production of nitric
oxide. Nitroglycerin can decrease chest pain, decreases blood pressure,
increases heart rate and induces orthostatic hypotension.
Side effects include headache, painful urination and diarrhea. Headaches
are common after nitroglycerin therapy and induced by release of nitric
oxide.
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Research Concepts:
Nitroglycerin:
Choices:
1. Pelvic trauma
2. Leg trauma
3. Chest trauma
4. Abdominal trauma
Answer: 3 - Chest trauma
Explanations:
Trendelenburg is contraindicated in head and chest trauma
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Research Concepts:
Chest Trauma:
Patient Positioning:
Choices:
1. Amiodarone
2. Lidocaine
3. Magnesium hydroxide
4. Aluminum salts
Answer: 1 - Amiodarone
Explanations:
Amiodarone is class III antiarrhythmic
It can result in highly increased serum digoxin levels if given concurrently
Lidocaine reduces the risk of arrhythmia in digitalis toxicity
Magnesium and aluminum salts decrease GI absorption of Digoxin
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Research Concepts:
Digoxin:
Amiodarone:
Drug Interactions:
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Question 1643: What is the most common work related source of hepatitis
B infections among healthcare workers?
Choices:
1. Accidental needle sticks
2. Direct contact with a patient's skin
3. Respiratory droplets
4. Oral fecal contamination
Answer: 1 - Accidental needle sticks
Explanations:
Accidental needle sticks are the most common source of work related
hepatitis B infections in healthcare workers.
They are also one of the most common source of HIV infections among
healthcare workers.
Hepatitis A not B is spread by oral fecal contamination.
Influenza is spread by respiratory droplets.
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Research Concepts:
Hepatitis B:
Needle Stick:
Choices:
1. Calcium channel blockers
2. Diuretics
3. Angiotensin-converting enzyme inhibitors
4. Beta blockers
Answer: 2 - Diuretics
Explanations:
The use of diuretics should be avoided in patients with gout due to
possibility of further elevating uric acid levels.
This is worst with the thiazides but occurs with all classes.
There is rarely concern in patients with asymptomatic hyperuricemia.
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Research Concepts:
Gout:
Diuretics:
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Research Concepts:
Warfarin:
Food Interactions:
Choices:
1. Its course is constant
2. It drains into the femoral vein
3. It courses between the lateral malleolus and the Achilles tendon
4. It contains bicuspid instead of tricuspid valves
Answer: 3 - It courses between the lateral malleolus and the Achilles tendon
Explanations:
The great saphenous vein originates on the dorsum of the foot and passes
anterior to the anterior malleolus where it can be visualized.
At the knee, the great saphenous vein runs slightly posterior to the medial
epicondyle and on to the femur.
The great saphenos vein joins the femoral vein in the femoral triangle. The
saphenous nerve is a branch of the femoral nerve and runs with the
saphenous vein.
The saphenous vein cutdown is usually made just over the dorsum where
the vein is anterior to the medial malleolus.
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Saphenous Vein:
Choices:
1. Spironolactone
2. Amiloride
3. Triamterene
4. Eplerenone
Answer: 4 - Eplerenone
Explanations:
Eplerenone is a specific aldosterone receptor blocker that can be used as a
diuretic
Spironolactone antagonizes the action of aldosterone but does not block its
receptors
Same is true for the other potassium sparing drugs such as triamterene and
amiloride
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Research Concepts:
Eplerenone:
Choices:
1. Ehlers-Danlos with a dilated aortic root
2. Marfan syndrome
3. Annulo-aortic ectasia
4. Aortic dissection
Answer: 4 - Aortic dissection
Explanations:
When the aortic sinuses are involved, or if a patient has Marfan, Ehlers-
Danlos, or annulo-aortic ectasia, a composite conduit with a graft should be
placed.
No part of the ascending aorta must be left behind. However, in aortic
dissection, only the ascending aorta is replaced in about 70-80% of patients.
The goal in aortic dissection is to obliterate the intimal tear and close the
false lumen.
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Aortic Dissection:
Choices:
1. Systolic ejection murmur radiating to the neck
2. Delayed carotid upstroke
3. S4
4. All of them
Answer: 4 - All of them
Explanations:
Physical exam in a patient with AS may reveal a systolic ejection murmur
radiating to the neck, an S4 and a delayed carotid upstroke
A soft paradoxical S2 is often heard
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Research Concepts:
Aortic Stenosis:
Aortic Stenosis:
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Research Concepts:
Mitral Stenosis:
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Research Concepts:
Dopamine:
Choices:
1. Acarbose
2. Metformin
3. Pioglitazone
4. Glipizide
Answer: 4 - Glipizide
Explanations:
Sulfonylurea antidiabetic drugs act through stimulation of insulin release
Excess stimulation with sulfonylureas such as glipizide, are common causes
of drug induced hypoglycemia
The other diabetic medications are not common causes of hypoglycemia
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Research Concepts:
Sulfonylureas:
Hypoglycemia:
Choices:
1. Establish pulselessness, give two breaths, and begin chest compressions
2. Establish unresponsiveness, obtain assistance, position patient, establish
pulselessness, begin CPR protocol with 100 compressions per minute
3. Establish unresponsiveness, clear the airway, ventilate with two breaths,
and begin chest compressions at 80 per minute
4. Establish breathlessness, clear the airway, give two breaths, establish
pulselessness, begin chest compressions at 60 per minute
Answer: 2 - Establish unresponsiveness, obtain assistance, position patient,
establish pulselessness, begin CPR protocol with 100 compressions per minute
Explanations:
Establish unresponsiveness, obtain assistance, position patient, establish
pulselessness, begin CPR protocol with 100 compressions per minute.
The adult protocol is followed for children over 8 years old.
Hands-only CPR is advocated in the field. Ventilatory support is secondary.
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Research Concepts:
Cardiopulmonary Resuscitation:
Choices:
1. Niacin
2. Ezetimibe
3. Fluvastatin
4. Lipitor
Answer: 2 - Ezetimibe
Explanations:
Ezetimibe causes cholesterol reduction by interference with gut absorption
of cholesterol.
Ezetimibe is most effective when combined with a statin.
It has not been shown to decrease cardiovascular events or decrease
atherosclerosis.
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Ezetimibe:
Choices:
1. Physical restraints
2. More than three medications
3. Unfamiliar environment
4. Use of haloperidol
Answer: 4 - Use of haloperidol
Explanations:
Intensive care unit (ICU) psychosis is a disturbance of consciousness and
attention with a change in cognition. It has a rapid onset and often lasts
several days.
Factors that can precipitate ICU psychosis include use of physical
restraints, numerous medications, unfamiliar environment, and lack of
sleep.
Treatment involves the use of sedatives and antipsychotics such as
haloperidol.
Some patients may benefit from use of narcotics and benzodiazepines such
as midazolam.
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Research Concepts:
ICU psychosis:
Choices:
1. Barrel chest deformity
2. Dyspnea on exertion
3. Clubbed fingers
4. Decreased respiratory rate
Answer: 4 - Decreased respiratory rate
Explanations:
A decreased respiratory rate is not a sign or symptom of COPD
Patients with COPD are usually tachypneic
Other sign and symptoms include barrel chest, clubbed fingers, and
prolonged expiratory phase
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Research Concepts:
Obstructive Pulmonary Disease, Chronic (COPD):
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Beriberi (Thiamine Deficiency):
Choices:
1. Quinidine
2. Amiodarone
3. Phenytoin
4. Sotalol
Answer: 3 - Phenytoin
Explanations:
Phenytoin is an anticonvulsant and is sometimes used to treat digoxin-
induced arrhythmias.
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Research Concepts:
Arrhythmias:
Digoxin:
Choices:
1. An intermediate probability V/Q scan with high index of clinical suspicion
requires no further evaluation
2. PE is more common in females than males
3. The prevalence, after age of 50, is the same in both male and female
4. D dimer assay is highly diagnostic of a PE
Answer: 3 - The prevalence, after age of 50, is the same in both male and
female
Explanations:
Although the prevalence of PE is higher in males than females before 50
year of age, this trend resolves with age
An intermediate probability perfusion scan with a remain index of suspicion
would merit anticoagulation and a pulmonary arteriogram
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Research Concepts:
Pulmonary Embolism:
Choices:
1. Coloboma
2. Heart disease
3. Aniridia
4. Choanal atresia
Answer: 3 - Aniridia
Explanations:
CHARGE syndrome encompasses a wide spectrum of abnormalities caused
by a hereditary abnormality.
Coloboma, heart disease, atresia choanae, retarded growth and
development, and genital anomalies are consider part of CHARGE
syndrome.
Aniridia is not part of CHARGE syndrome.
No one feature is always present or adequate for the diagnosis of CHARGE
syndrome.
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Research Concepts:
Charge Syndrome:
Choices:
1. Increase on blood pressure
2. Down sloping of ST segment by 1 mm
3. Presence of U wave on ECG
4. Peaked T waves
Answer: 2 - Down sloping of ST segment by 1 mm
Explanations:
Horizontal or down sloping ST segment depression of at least 1 mm is a
good indication for the presence of angina.
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Treadmill Stress Testing:
Choices:
1. Choking
2. Dizziness
3. Leg cramp
4. Vomiting
Answer: 1 - Choking
Explanations:
Airway obstruction is the first priority for treatment.
The ABCs of triage indicate one should immediately assess and treat
Airway, Breathing, and Cardiac problems.
The other choices do not represent immediately threats to life.
Choking is first treated by attempting a Heimlich maneuver.
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Research Concepts:
Choking:
Choices:
1. Tomato juice
2. Bread
3. Chicken
4. Oranges
Answer: 1 - Tomato juice
Explanations:
Many canned foods and juices such as tomato juice are high in sodium and
should be avoided in a sodium-restricted diet
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Research Concepts:
Dietary Sodium:
Choices:
1. Chorea
2. Pancarditis
3. Subcutaneous nodules
4. Erythema nodosum
Answer: 4 - Erythema nodosum
Explanations:
Carditis is present in nearly 40% of patients and may include new onset
heart failure, pericarditis, and cardiomegaly.
Migratory polyarthritis occurs in most patients and usually involves the
large joints.
Subcutaneous nodules are painless and occur in less than 10% of patients.
Chorea occurs in 10% of cases. Erythema marginatum occurs in 5% of
patients; the rash is serpiginous and long-lasting.
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Research Concepts:
Rheumatic Fever, Acute:
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Cardiogenic Shock:
Choices:
1. Tachycardia
2. Constipation
3. Dysrhythmia
4. Anorexia
Answer: 4 - Anorexia
Explanations:
Anorexia is a common early sign of digoxin toxicity.
Visual symptoms are also common early signs of toxicity and include
colored halos around bright or green lights and a green or yellow tint to
white objects.
Tachycardia is usually a later sign of digoxin toxicity. Constipation is not
usually a sign of digoxin toxicity.
Dysrhythmia is usually a later sign of digoxin toxicity.
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Research Concepts:
Digoxin Toxicity:
Choices:
1. Digoxin
2. Captopril
3. Dobutamine
4. Amiodarone
Answer: 3 - Dobutamine
Explanations:
Dobutamine is an inotropic agent with Beta-1 receptor agonist activity.
Dobutamine increases the force of contraction of the heart and it also
vasodilates the pulmonary arteries.
Dobutamine is used to treat heart failure and cardiogenic shock.
Dobutamine has mild Beta-2 agonist activity and can only be used
intravenously.
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Research Concepts:
Inotropes And Vasopressors:
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Research Concepts:
Venous Air Embolism:
Choices:
1. Category A: Adequate and well-controlled studies have failed to
demonstrate a risk to the fetus in the first trimester of pregnancy (and there
is no evidence of risk in later trimesters).
2. Category B: Animal reproduction studies have failed to demonstrate a risk
to the fetus and there are no adequate and well-controlled studies in
pregnant women.
3. Category C: Animal reproduction studies have shown an adverse effect on
the fetus and there are no adequate and well-controlled studies in humans,
but potential benefits may warrant use of the drug in pregnant women
despite potential risks.
4. Category X: There is positive evidence of human fetal risk based on
adverse reaction data from investigational or marketing experience or
studies in humans, but potential benefits may warrant use of the drug in
pregnant women despite potential risks.
Answer: 4 - Category X: There is positive evidence of human fetal risk
based on adverse reaction data from investigational or marketing experience or
studies in humans, but potential benefits may warrant use of the drug in pregnant
women despite potential risks.
Explanations:
Category X: Studies in animals or humans have demonstrated fetal
abnormalities and/or there is positive evidence of human fetal risk based on
adverse reaction data from investigational or marketing experience, and the
risks involved in use of the drug in pregnant women clearly outweigh
potential benefits.
Category B: Animal reproduction studies have failed to demonstrate a risk
to the fetus and there are no adequate and well-controlled studies in
pregnant women.
Category C: Animal reproduction studies have shown an adverse effect on
the fetus and there are no adequate and well-controlled studies in humans,
but potential benefits may warrant use of the drug in pregnant women
despite potential risks.
Category D: There is positive evidence of human fetal risk based on
adverse reaction data from investigational or marketing experience or
studies in humans, but potential benefits may warrant use of the drug in
pregnant women despite potential risks.
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Research Concepts:
Medications in Pregnancy:
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Question 1670: The most common treatment for paroxysmal
supraventricular tachycardia is:
Choices:
1. Magnesium
2. Shock
3. Calcium channel blocker
4. Digoxin
Answer: 3 - Calcium channel blocker
Explanations:
The most common treatment for paroxysmal supraventricular tachycardia is
a calcium blocker
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Research Concepts:
Paroxysmal Supraventricular Tachycardia:
Choices:
1. Pull out the tongue
2. Tilt head and lift chin
3. Lift neck from behind
4. Jaw thrust
Answer: 2 - Tilt head and lift chin
Explanations:
The simplest way to ensure an open airway in an unconscious patient is to
use a head tilt and chin lift technique.
This maneuver lifts the tongue from the back of the throat.
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Research Concepts:
Airway, Management:
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Hyponatremia:
Electrolyte Abnormalities:
Choices:
1. Papillary muscles and chordae tendineae
2. Pectinate muscles
3. AV and SA nodes
4. Myometrium
Answer: 1 - Papillary muscles and chordae tendineae
Explanations:
The flaps on the bicuspid valve and tricuspid valve are connected to the
chordae tendineae which are connected to the papillary muscle
They prevent the cusps from being everted into the atrium during
ventricular contraction
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Research Concepts:
Heart Anatomy:
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Research Concepts:
Thrombolytic Therapy:
Hemothorax:
Choices:
1. 1%
2. 5%
3. 20%
4. 33%
Answer: 3 - 20%
Explanations:
20% of patients with Down syndrome have congenital cardiovascular
disease
The most common findings are atrial septal defect and ventricular septal
defect
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Research Concepts:
Down Syndrome:
Choices:
1. Compensated respiratory alkalosis
2. Uncompensated metabolic alkalosis
3. Compensated metabolic alkalosis
4. Uncompensated respiratory alkalosis
Answer: 3 - Compensated metabolic alkalosis
Explanations:
The ABG interpretation is a compensated metabolic alkalosis
pH is normal, indicating a compensated state but is trending toward
alkalosis
Bicarbonate is high, indicating primary event is metabolic
PCO2 is high, indicating a compensatory respiratory acidosis
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Research Concepts:
Metabolic Alkalosis:
Choices:
1. LMWH are longer acting than heparin
2. LMWH do not require monitoring like heparin
3. LMWH doses are based on the weight of patient
4. LMWH is given intravenously
Answer: 4 - LMWH is given intravenously
Explanations:
LMWH is widely used in hospitals and has largely replaced unfractionated
heparin.
The agents are given subcutaneously and are just as effective as heparin.
They are never given intravenously.
Unlike heparin, they do not require monitoring.
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Research Concepts:
Low Molecular Weight Heparin (LMWH):
Heparin:
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Activated Clotting Time:
Choices:
1. Centrally placed nuclei in the muscle fibers
2. Basophilic muscle fibers
3. Striated muscle
4. Intercalated discs
Answer: 2 - Basophilic muscle fibers
Explanations:
Cardiac muscle fibers are eosinophilic
Cardiac muscle has intercalated discs, striated muscle fibers, and centrally
placed nuclei in the fibers
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Heart Histology:
Choices:
1. Heparin
2. Penicillin
3. Atorvastatin
4. Warfarin
Answer: 3 - Atorvastatin
Explanations:
The most serious side effects of statins are myositis and myopathy.
In a few individual statins can induce skeletal muscle breakdown and
rhabdomyolysis which can cause renal failure.
Risk of rhabdomyolysis is increased when statins are combined with fibrate
drugs.
Other rare side effects of statins include intestitial lung disease, cognitive
impairment, erectile dysfunction, and abdominal pain.
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Research Concepts:
Statin Medication:
Choices:
1. Gum hypertrophy
2. Hypertension
3. Hypokalemia
4. Hirsutism
Answer: 3 - Hypokalemia
Explanations:
Cyclosporine is used to prevent rejection of transplanted organs.
Cyclosporine is believed to act by binding to cyclophilin (immunophilin) of
immunocompetent T lymphocytes.
Cyclosporine has many side effects including gum hyperplasia, seizures,
peptic ulcers, pancreatitis, high blood pressure, hyperkalemia,
nephrotoxicity, hepatotoxicity, and an increased susceptibility to
opportunistic fungal and viral infections.
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Research Concepts:
Cyclosporine:
Choices:
1. Tetralogy of Fallot
2. Transposition of great vessels
3. Truncus arteriosus
4. Tricuspid atresia
Answer: 3 - Truncus arteriosus
Explanations:
The truncus and bulbus cordis are divided by the aorticopulmonary septum
When the aortico-pulmonary septum divides it gives rise to the aorta and
pulmonary artery
Failure of the truncus to divide leads to develop of truncus arteriosus
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Research Concepts:
Aorticopulmonary Membrane:
Truncus Arteriosus:
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Research Concepts:
Coronary Artery Anatomy:
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Research Concepts:
Aortic Regurgitation:
Choices:
1. Ascites
2. Myocardial infarction
3. Renal insufficiency
4. Hypotension
Answer: 3 - Renal insufficiency
Explanations:
Classic signs for heart rejection include dysrhythmia, CHF, and ascites
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Research Concepts:
Heart Transplantation:
Choices:
1. Echocardiogram after 24 hours
2. Percutaneous intervention (PCI) alone
3. Exercise stress test within 24 hours of admission
4. Early invasive therapy (e.g. routine catheterization within 48 hours and
revascularization as appropriate)
Answer: 4 - Early invasive therapy (e.g. routine catheterization within 48
hours and revascularization as appropriate)
Explanations:
Early invasive therapy would be most appropriate in this high-risk patient
ACC/AHA guidelines recommend ASA and clopidogrel or IV GP IIb/IIIa
inhibitor prior to intervention in medium to high-risk patients
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Angina, Unstable:
Choices:
1. Lymphatic obstruction
2. Right heart failure
3. Systemic edema of the body
4. Bilateral pleural effusions
Answer: 3 - Systemic edema of the body
Explanations:
Anasarca is essentially generalized edema and is characterized by extreme
swelling of the skin.
Anasarca is due to fluid extrusion into the extracellular space.
Anasarca is usually caused by congestive heart failure or liver or renal
disease.
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Anasarca:
Choices:
1. Jugular notch
2. Body of gladiolus
3. Sternal angle
4. Clavicular notch
Answer: 3 - Sternal angle
Explanations:
The sternal angle is a slight anterior projection formed by the junction of
the manubrium and the body.
The costal cartilage of the 2nd rib attaches at this point.
The angle of Louis also marks the site of bifurcation of the trachea into left
and right main stem bronchi.
The angle of Louis also corresponds with the upper body of the right
atrium.
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Research Concepts:
Thorax Anatomy:
Choices:
1. ACEI
2. Digoxin
3. Calcium channel blockers
4. Adenosine
Answer: 3 - Calcium channel blockers
Explanations:
Either calcium channel blockers or beta-blockers can be used for ventricular
control.
Most patients need to be on anticoagulation medication at the same time.
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Research Concepts:
Atrial Flutter:
Choices:
1. The use of more than one pharmacy
2. Six or more prescribed concomitant drugs and/or the use of potentially
inappropriate medication
3. The use of multiple illegally obtained prescriptions
4. All medications prescribed to a patient
Answer: 2 - Six or more prescribed concomitant drugs and/or the use of
potentially inappropriate medication
Explanations:
The use of more than one pharmacy is ill advised, but is a consumer's
choice.
A working definition of polypharmacy is the use of six or more prescribed
concomitant drugs and/or the use of potentially inappropriate medication.
The use of multiple illegally obtained prescriptions is a crime.
All the medications prescribed to a patient is a medication inventory.
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Research Concepts:
Polypharmacy:
Managed Care:
Choices:
1. 10
2. 25
3. 30
4. 35
Answer: 2 - 25
Explanations:
Only about half of all patients with acute MI will have diagnostic changes
on ECG
ECG shows ST-segment or T-wave changes
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Research Concepts:
Electrocardiogram:
Choices:
1. Dizziness
2. Tachycardia
3. Jugular venous distension
4. Absence of 3rd heart sound
Answer: 3 - Jugular venous distension
Explanations:
Tricuspid regurgitation can develop following an endomyocardial biopsy to
determine the presence of rejection of the donor heart
Tricuspid regurgitation causes symptoms of right-sided heart failure
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Research Concepts:
Endomyocardial Biopsy:
Tricuspid Regurgitation:
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Research Concepts:
Anticoagulation:
Choices:
1. 81 mg
2. 162 mg
3. 325 mg
4. 650 mg
Answer: 1 - 81 mg
Explanations:
Aspirin is given for prophylaxis at 81 mg per day
Aspirin is an irreversible COX inhibitor
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Research Concepts:
Aspirin:
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Research Concepts:
Aortic Stenosis:
Choices:
1. Benzodiazepine
2. Omeprazole
3. Nitroglycerin
4. NSAID
Answer: 4 - NSAID
Explanations:
This case is likely due to Dressler syndrome, also known as post
myocardial infarction syndrome.
It is a benign autoimmune pleuritis or pericarditis that occurs up to 2-3
weeks after myocardial infarction.
It occurs most commonly following open heart surgery, ST elevation MI, or
pericardial bleeding.
Therapy is rest and NSAIDs or sometimes glucocorticoids.
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Research Concepts:
Dressler Syndrome:
Choices:
1. Renal elimination
2. Renal metabolism
3. Class 1 antiarrhythmic agent
4. Needs a loading dose
Answer: 2 - Renal metabolism
Explanations:
Procainamide is metabolized by the liver and eliminated in the kidneys.
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Research Concepts:
Procainamide:
Choices:
1. History of PVCs
2. Angina on exertion
3. Angina at rest
4. History of MI 7 months ago
Answer: 4 - History of MI 7 months ago
Explanations:
Generally, a patient who waits about 6 months after an MI to have surgery
has a reduced risk of another MI.
All the rest are risk factors for MI.
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Research Concepts:
Perioperative Cardiac Management:
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Vitamin K:
Choices:
1. Digoxin
2. Terazosin
3. Furosemide
4. Metoprolol
Answer: 4 - Metoprolol
Explanations:
Beta-blockers are known to improve long term survival in patients with
myocardial infraction
Propranolol and metoprolol are common beta-blockers used
Beta-blockers reduce sympathetic activity and cardiac contractility
Alpha-1-blockers like terazosin may result in unopposed beta stimulation
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Research Concepts:
Acute Myocardial Infarction:
Beta-Blockers:
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Research Concepts:
Oxyhemoglobin Dissociation Curve:
Choices:
1. It is not the duration of surgery but the type of surgery that increases risk of
DVT
2. Prophylaxis against DVT is now routine in most elective surgeries
3. DVT always presents with a painful and swollen calf
4. Aspirin can prevent most cases of DVT
Answer: 2 - Prophylaxis against DVT is now routine in most elective
surgeries
Explanations:
DVT depends on the duration of surgery. The longer the procedure, the
greater the risk of DVT. While it is true that certain lower abdominal and
pelvic surgeries make a patient more prone to DVT, almost any surgery is a
risk factor for DVT.
The majority of elective surgeries done today are done under DVT
prophylaxis. Prophylaxis includes heparin, compression stockings, or use of
sequential pumps.
DVT can present in subtle ways and can be asymptomatic in many cases.
The only way to make a diagnosis is to have a suspicion and order a duplex
ultrasound.
Aspirin has never been shown to be an effective agent against DVT.
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DVT:
Choices:
1. Keep blood pressure on the low side
2. Restore blood pressure to normal
3. Restore blood pressure to just 40 mmHg above normal
4. Restore blood pressure so that there is urine output
Answer: 2 - Restore blood pressure to normal
Explanations:
There has been a lot of controversy about how aggressive to be with fluid
resuscitation in patients with hemorrhage shock.
Today the consensus is that the blood pressure should be restored to normal.
The will allow organ perfusion.
Excess elevation of blood pressure with fluids can lead to more bleeding.
Controlled resuscitation strikes a balance between low blood pressure and
organ perfusion. This method is now advocated for most trauma patients.
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Research Concepts:
Shock, Hemorrhagic:
Choices:
1. Circumflex artery
2. Left coronary artery
3. Posterior interventricular artery
4. Anterior right atrial artery
Answer: 4 - Anterior right atrial artery
Explanations:
The terminal branch of the anterior right atrial artery is the SA nodal artery
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Research Concepts:
Anterior Right Atrial Artery:
Choices:
1. I and II
2. II, III, and aVF
3. V1 and V2
4. V5 andV6
Answer: 3 - V1 and V2
Explanations:
Elevations in leads V1 and V2 occur with anteroseptal infarctions
Elevations in leads II, III, and aVF are associated with inferior infarcts
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Anteroseptal Myocardial Infarction:
Choices:
1. Intravenous antibiotics
2. Surgical referral
3. Cardiac catheterization
4. Blood cultures before antibiotics
Answer: 2 - Surgical referral
Explanations:
The patient presents with congestive heart failure secondary to an atrial
myxoma
There is evidence of peripheral embolization
Myxomas are most common in women age 20 to 50
Surgery is indicated with recurrence occurring in only 1 or 2%
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Research Concepts:
Atrial Myxoma:
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Protamine:
Choices:
1. Norepinephrine
2. Dobutamine
3. Dopamine
4. All of the above
Answer: 4 - All of the above
Explanations:
A variety of pressor drugs are used to treat cardiogenic shock.
The classic drugs include dopamine, norepinephrine, and epinephrine.
The mean blood pressure required for adequate tissue perfusion is
60mmHg.
In patients with inadequate tissue perfusion, initiation of inotropic and
vasopressor drug therapy is necessary.
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Research Concepts:
Cardiogenic Shock:
Choices:
1. Ticlopidine
2. Clopidogrel
3. Abciximab
4. Dipyridamole
Answer: 3 - Abciximab
Explanations:
Abciximab is a monoclonal antibody against the glycoprotein 2b/3a platelet
receptor.
It is used during angioplasty because of its very short half life and prevents
thrombus formation.
Major side effect is hemorrhage.
Thrombocytopenia can also occur several days later and transfusions of
platelets is the only effective treatment for hemorrhage.
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Anticoagulation:
Choices:
1. Within the first 24 hrs
2. Within the first hour
3. Only after a myocardial infarction has been confirmed
4. Anytime within the first 12 hours
Answer: 2 - Within the first hour
Explanations:
Once an acute myocardial infarction has been established, emergency
angioplasty or anticoagulation are vital.
All patients should receive a baby aspirin as soon as possible.
Thrombolytic therapy should generally be started within the first 30
minutes.
The goal of angioplasty is to get the patient in the catheterization lab within
the first 60 minutes.
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Research Concepts:
Myocardial Infarction, Acute:
Choices:
1. Sedatives
2. Pain medication
3. Anti-hypertensives
4. Antibiotics
Answer: 2 - Pain medication
Explanations:
PCA stands for patient controlled analgesic machine.
Patient has control of the administration of the drug.
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Research Concepts:
Patient Controlled Anesthesia (PCA):
Explanations:
Endomyocardial biopsies are usually done for 5 years to detect rejection
83% of patients survive for 1 year and 76% for more than 3 years
Mortality after 1 year is most often due to coronary artery disease
Within the first year, acute rejection and infection are the major causes of
mortality
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Research Concepts:
Heart Transplantation:
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Flecainide:
Choices:
1. Right atrium
2. Right ventricle
3. Left ventricle
4. Left atrium
Answer: 1 - Right atrium
Explanations:
The majority of benign tumors are located in the left atrium. Myxomas are
very rare in other chambers of the heart. In Carney syndrome, myxomas
may occur in other chambers of the heart.
The majority of left atrial myxomas are found near the fossa ovalis in the
atrium.
Cardiac myxomas that occur as part of the Carney syndrome are less
common in the left atrium and are often multicentric.
Cardiac myxomas can present with any number of symptoms but the most
common is a triad of embolic phenomenon, mitral stenosis like symptoms
and constitutional features. More than 50% will present with left sided heart
failure when the tumors are large.
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Atrial Myxoma:
Choices:
1. Calcium chloride
2. Insulin
3. Magnesium
4. Kayexalate
Answer: 3 - Magnesium
Explanations:
The treatments of hyperkalemia involves insulin, sodium polystyrene
sulfonate, and calcium.
Beta agonists can be given.
Magnesium has no role in the treatment of hyperkalemia.
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Research Concepts:
Hyperkalemia:
Choices:
1. Systemic embolism
2. Pulmonary hypertension
3. Tricuspid regurgitation (TR)
4. Hemoptysis
Answer: 3 - Tricuspid regurgitation (TR)
Explanations:
In about 5-10% of patients undergoing mitral valve surgery, tricuspid
annuloplasty is performed but less than 2% of patients require tricuspid
valve replacement
Patients with functional TR secondary to mitral disease who do not undergo
repair of the tricuspid valve at the time of initial surgery have a variable
course
When the TR is not repaired at the initial surgery, only 10-20% have severe
TR post operatively
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Research Concepts:
Mitral Valve Replacement:
Choices:
1. Bargaining
2. Denial
3. Acceptance
4. Depression
Answer: 2 - Denial
Explanations:
The stages of grief: denial, anger, bargaining, depression and acceptance
The stages of grief may not necessarily occur in above sequence
There are many who are critical of this idea
It is important to understand how to deal with each stage of grief
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Research Concepts:
Grief Reaction:
Choices:
1. Gum hypertrophy
2. Hypertension
3. Hypokalemia
4. Hirsutism
Answer: 3 - Hypokalemia
Explanations:
Cyclosporine has many adverse side effects.
Most common include gingival hyperplasia, convulsions, peptic ulcers,
fever, vomiting, diarrhea, and confusion.
Cyclosporine can cause a rise in blood pressure and even leads to potassium
retention.
Burning sensation at fingertips is also widely reported in patients who use
cyclosporine.
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Research Concepts:
Cyclosporine:
Choices:
1. Associated with focal neurological deficits
2. Patients present with non specific symptoms
3. Fever is a common sign
4. Murmurs are often absent
Answer: 4 - Murmurs are often absent
Explanations:
While most patients present with nonspecific symptoms, murmurs are
commonly associated with subacute infectious endocarditis
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Research Concepts:
Endocarditis, Bacterial:
Explanations:
Elevated levels of CKMB or troponin are not specific enough, and nor is
the ECG
Some believe that new regional wall abnormalities on TEE may be the best
indicator of a post CABG MI
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Research Concepts:
Acute Myocardial Infarction:
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Research Concepts:
Lung Anatomy:
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Stroke:
Choices:
1. Morphine
2. Meperidine
3. Fentanyl
4. Acetaminophen
Answer: 4 - Acetaminophen
Explanations:
All narcotics can cause dysphoria, irrespective of the dose.
Acetaminophen is a non-narcotic and does not produce dysphoria, even in
large doses.
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Research Concepts:
Non-Narcotic Pain Medicines:
Opioids:
Choices:
1. Non-Q wave MI (NQWMI)
2. ST-segment elevation MI (STEMI) seen within 12 hours of onset of
symptoms
3. Non-STEMI (NSTEMI)
4. None of the above
Answer: 2 - ST-segment elevation MI (STEMI) seen within 12 hours of
onset of symptoms
Explanations:
Patients with STEMI presenting within in 12 hours of onset of symptoms
are candidates for reperfusion therapy
Reperfusion therapy reduces infarct size
It also limits ventricular dysfunction and reduces serious complications
Reperfusion therapy is not appropriate for those with NQWMI and
NSTEMI
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Research Concepts:
Acute Myocardial Infarction:
Choices:
1. Bisacodyl
2. Cimetidine
3. Magnesium hydroxide
4. Omeprazole
Answer: 4 - Omeprazole
Explanations:
Peptic ulcer disease results in gastric mucosal erosion caused by acid injury
Acid production can be maximally reduced by proton pump inhibitors
Omeprazole is one of the commonly used PPIs
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Research Concepts:
Peptic Ulcer Disease:
Choices:
1. Cardiac arrhythmias
2. Myocardial infarction (MI)
3. Chest pain associated with stable angina
4. None of the above
Answer: 3 - Chest pain associated with stable angina
Explanations:
A buildup of lactic acid and carbon dioxide is implicated in chest pain
associated with stable angina
Stable angina is a temporary low flow state in the coronary arteries and
does not lead to infarction (i.e. cell injury or death)
During the low flow state, lactic acid and carbon dioxide buildup causing
pain
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Research Concepts:
Angina, Stable:
Explanations:
Normal valve area of the mitral valve is about 4-6 cm2.
The normal left atrial pressure is 5 mm Hg and in severe cases of mitral
stenosis, it increase to 20 mmHg. This leads to increased pressure in the
pulmonary vasculature.
The majority of cases of mitral stenosis are due to rheumatic fever.
Most people who have rheumatic fever develop mitral stenosis after 1-2
decades. Once symptoms start they usually progress.
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Mitral Stenosis:
Choices:
1. Ischemic cardiomyopathy
2. Mild to moderate heart failure (HF)
3. Nonischemic cardiomyopathy
4. All of the above
Answer: 4 - All of the above
Explanations:
Numerous clinical trials have concluded reduced mortality in patients with
mild to moderate HF, ischemic and nonischemic cardiomyopathy receiving
ACE inhibitors
The above is considered a class effect of ACE inhibitors
ACE inhibitors can cause potassium retention
Caution is necessary when initiating potassium in ACE inhibitor patients
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Research Concepts:
Angiotensin Converting Enzyme Inhibitors (ACEI):
Cardiomyopathy, Pathology:
Choices:
1. Venous air embolism
2. Deep venous thrombosis (DVT)
3. Venous thromboembolism
4. None of the above
Answer: 1 - Venous air embolism
Explanations:
Venous air embolism is predominantly an iatrogenic complication
It is mostly associated with neurosurgical procedures performed in the
sitting position
Other causes of venous air embolism include central venous catheterization,
blunt chest trauma, mechanical ventilation, thoracocentesis and
hemodialysis
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Research Concepts:
Venous Air Embolism:
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Acute Inflammatory Response:
Choices:
1. Increased potassium
2. Decreased potassium
3. Increased calcium
4. Dehydration
Answer: 2 - Decreased potassium
Explanations:
Digoxin has a low therapeutic index and arrhythmias are common when
potassium levels decrease.
Common symptoms include nausea, diarrhea, and vomiting. At high levels
digoxin may cause blurred vision, yellow halos, confusion, nightmares, and
depression.
When digoxin toxicity occurs, the typical feature on ECG is PR interval
prolongation.
Digoxin toxicity is treated with anti digoxin antibodies, potassium and
calcium. Digoxin levels in the blood are not affected by hemodialysis.
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Research Concepts:
Digoxin Toxicity:
Choices:
1. Vital capacity
2. Tidal capacity
3. Residual volume
4. Functional residual capacity
Answer: 2 - Tidal capacity
Explanations:
The normal tidal volume in an adult is about 500 cc
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Research Concepts:
Tidal Volume:
Choices:
1. Bulboventricular flange
2. Right sinal horn
3. Bulbus cordis
4. Aortic sac
Answer: 3 - Bulbus cordis
Explanations:
The truncus arteriosus and the conus arteriosus are the 2 parts of the bulbus
cordis
Ridges appear as bulges in the truncus arteriosus on the left inferior walls
and right superior wall and fuse to be the septum
The septum spirals as it separates the distal pulmonary artery from the aorta
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Research Concepts:
Bulbus Cordis:
Aorta:
Pulmonary Artery:
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Question 1734: Which antihypertensive agent acts centrally?
Choices:
1. Metoprolol
2. Captopril
3. Alpha methyldopa
4. Prazosin
Answer: 3 - Alpha methyldopa
Explanations:
Alpha methyldopa is converted to methyl norepinephrine centrally to
decrease the adrenergic outflow from the CNS, leading to a decreased total
peripheral resistance, and decreased systemic blood pressure.
With alpha methyldopa, cardiac output is not affected and blood supply to
the kidney remains the same.
Because alpha methyldopa does not affect blood supply to the kidney, it is
useful in hypertensive patients with renal insufficiency.
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Research Concepts:
Antihypertensive Medications:
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Research Concepts:
Carbon Dioxide Detector:
Choices:
1. It primarily contains phospholipids
2. It contains cholesterol
3. Proteins are the most abundant based on weight
4. It contains no channels
Answer: 4 - It contains no channels
Explanations:
Phospholipids are the most abundant based on the number of molecules.
Proteins make up the channels in the lipid bilayer.
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Cell Membrane:
Choices:
1. Staphylococcus aureus
2. Lyme disease
3. Group A Streptococcus
4. Streptococcus viridans
Answer: 3 - Group A Streptococcus
Explanations:
The patient most likely had rheumatic fever
Lyme disease can cause cardiomyopathy and cardiac conduction
abnormalities but not valvular disease
Strep viridans and Staph aureus can cause infectious endocarditis
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Rheumatic Fever, Pathology:
Choices:
1. Flumazenil
2. Naloxone
3. Naltrexone
4. Morphine sulfate
Answer: 4 - Morphine sulfate
Explanations:
Morphine overdose causes respiratory depression, bradycardia, and
hypotension.
Naloxone is the antidote for morphine overdose.
Naltrexone is useful in cases of substance abuse.
Flumazenil is used to treat overdose with benzodiazepines.
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Research Concepts:
Opioid Toxicity:
Choices:
1. Prazosin
2. Metoprolol
3. Clonidine
4. Isoproterenol
Answer: 2 - Metoprolol
Explanations:
Dobutamine directly stimulates beta 1 receptors and improves cardiac
output
Metoprolol is a selective beta 1 receptors blocker and can antagonize the
effects of dobutamine
Prazosin is an Alpha one blocker
Clonidine is an alpha two agonist
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Research Concepts:
Dobutamine:
Selective Beta-1-Blockers:
Choices:
1. Parachute mitral valve
2. Aortic stenosis
3. Coarctation of aorta
4. Supravalvular mitral membrane
Answer: 2 - Aortic stenosis
Explanations:
Shone syndrome is a congenital heart complex disorder consisting of 4
cardiac defects.
There is a supravalvular mitral membrane, parachute mitral valve, subaortic
stenosis, and coarctation of the aorta.
The lesion is characterized by obstruction of both the inflow and the
outflow of the left ventricle.
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Research Concepts:
Shone Syndrome:
Choices:
1. Factor 2
2. Factor 5
3. Factor 7
4. Factor 10
Answer: 4 - Factor 10
Explanations:
Both the intrinsic and extrinsic clotting pathways proceed through the
common pathway, forming activated factor X.
Prothrombin is cleaved by factor X to yield thrombin.
Thrombin then cleaves fibrinogen, which then forms fibrin monomers.
Thrombin also activates factors 8 and 5 and factor 13, which then forms
covalent bonds that cross-link fibrin polymers.
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Coagulation Pathways:
Choices:
1. Inflammation
2. Peptic ulcer disease
3. Pulmonary artery pressure
4. Incidence of asthma
Answer: 3 - Pulmonary artery pressure
Explanations:
Nitric oxide has found use in cardiovascular surgery. It has been used
successfully when there is pulmonary hypertension.
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Nitric Oxide:
Choices:
1. Pain when patient goes outside on a cold day
2. Pain after a big meal
3. Change in pattern of pain
4. Pain after raking the leaves
Answer: 3 - Change in pattern of pain
Explanations:
The patient should report a change in the pattern of chest pain.
It may indicate increasing severity of coronary artery disease.
Pain is expected with exertion or situations that decrease blood flow to the
heart (big meal) or increase peripheral resistance (cold weather).
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Angina, Stable:
Choices:
1. SA node
2. Bundle of His
3. Pectinate muscle
4. AV node
Answer: 4 - AV node
Explanations:
The atrioventricular node is supplied by the posterior interventricular artery.
This is a branch of right coronary artery in those who have right dominance.
The rest of patients have supply from the left circumflex via the posterior
interventricular artery.
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Heart Anatomy:
Choices:
1. Prevents uptake of catecholamines
2. Prevents release of catecholamines from the nerve endings
3. Acts as an agonist on presynaptic receptors
4. Increases breakdown of catecholamines
Answer: 3 - Acts as an agonist on presynaptic receptors
Explanations:
Clonidine works in the brain as an alpha agonist.
By stimulating the presynaptic alpha-receptors, there is a decrease in
sympathetic stimulation and consequently a lowering of blood pressure.
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Research Concepts:
Clonidine:
Choices:
1. Dull, boring pain
2. Pain lasting for more than 4 hours
3. Pain occurring at rest
4. Chest pain radiating to the jaw or left arm
Answer: 4 - Chest pain radiating to the jaw or left arm
Explanations:
In at least 10-19 percent of patients with jaw or left arm pain, there is a
strong correlation with ischemic chest pain.
In general, any type of chest pain must be investigated.
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Research Concepts:
Coronary Artery Disease:
Chest Pain:
Choices:
1. Treatment of serious infections secondary to Gram-positive bacteria that are
beta-lactam-resistant
2. Treatment of infections secondary to Gram-positive bacteria in those with
anaphylaxis to beta-lactam antibiotics
3. Empiric antimicrobial therapy for a febrile neutropenic patient
4. Antibiotic prophylaxis for implantation of devices or prosthetic materials at
hospitals with high incidence of MRSA infections
Answer: 3 - Empiric antimicrobial therapy for a febrile neutropenic patient
Explanations:
The Centers for Disease Control and Prevention have established guidelines
for situations in which the use of vancomycin is appropriate as well as
situations in which the use of vancomycin is discouraged
"Empiric antimicrobial therapy for a febrile neutropenic patient, unless
initial evidence indicates that the patient has an infection caused by gram-
positive microorganisms (e.g., at an inflamed exit site of Hickman catheter)
and the prevalence of infections caused by MRSA in the hospital is
substantial"
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Research Concepts:
Vancomycin:
Choices:
1. Calcium channel blockers and diuretics
2. Antiarrhythmics and diuretics
3. Beta blockers and diuretics
4. ACE inhibitors and diuretics
Answer: 4 - ACE inhibitors and diuretics
Explanations:
ACE inhibitors and diuretics are the primary treatment for left ventricular
dysfunction with mitral valve regurgitation.
An ARB can be substituted if the ACEI is not tolerated.
Nitrates are occasionally used.
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Research Concepts:
Mitral Regurgitation:
Choices:
1. Single lung transplant
2. Bilateral lung transplant
3. Heart and lung transplant
4. Heart transplant
Answer: 3 - Heart and lung transplant
Explanations:
The heart and lung transplant is the procedure of choice if the underlying
cardiac defect cannot be fixed.
Bilateral lung transplant is considered if the cardiac defect is very simple.
Repair of the cardiac defect alone is not recommended.
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Research Concepts:
Eisenmenger Syndrome:
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Research Concepts:
Central Venous Pressure:
Choices:
1. Saline irrigation
2. Apply direct pressure
3. Apply indirect pressure
4. Use a tourniquet
Answer: 2 - Apply direct pressure
Explanations:
Direct pressure on a wound is the most appropriate way to control bleeding
in most body areas.
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Research Concepts:
Hemorrhage Control:
Choices:
1. Age
2. IDDM
3. Repeat contrast doses
4. NSAID use
Answer: 4 - NSAID use
Explanations:
Risk factors for CIN are subcateogrized as patient related, procedure
related, and contrast related.
Patient related factors include patient age, the presence of chronic renal
disease, IDDM, or HTN, metabolic syndrome, multiple myeloma, anemia,
renal transplant, or hypoalbuminemia. It also includes cases of hypovolemia
or decreased effective circulating volumes as evidence by CHF, EF < 40%,
hypotension, or need for IABP.
Procedure related risk factors include urgent rather than elective imaging,
arterial rather than venous contrast administration, and diagnostic rather
than therapeutic contrast administration.
Contrast-related risk factors are related to contrast volume, contrast
osmolarity, ionicity, and viscosity.
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Research Concepts:
Contrast-Induced Nephropathy:
Choices:
1. 5
2. 10
3. 15
4. 20
Answer: 3 - 15
Explanations:
Studies have shown that smoking associated risks are the same as normal
population after 15 year of cessation
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Research Concepts:
Smoking Cessation:
Cardiovascular Disease:
Choices:
1. High frequency
2. Low frequency
3. High voltage
4. Low voltage
Answer: 1 - High frequency
Explanations:
The frequency of electrocautery is above 100 hertz.
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Research Concepts:
Electrocautery:
Choices:
1. Stat cardioversion
2. ECHO
3. Intravenous Lidocaine
4. IV amiodarone
Answer: 1 - Stat cardioversion
Explanations:
The ECG findings suggest atrial fibrillation with rapid ventricular rate.
Immediate electrical defibrillation is indicated if the patient is
hemodynamically unstable.
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Research Concepts:
Hypotension:
Atrial Fibrillation:
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Research Concepts:
Great Vessel Embryology:
Choices:
1. Rales
2. Desaturation
3. Respiratory alkalosis
4. Angina
Answer: 3 - Respiratory alkalosis
Explanations:
Acute pulmonary edema can present with respiratory acidosis.
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Research Concepts:
Pulmonary Edema, Cardiogenic:
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Research Concepts:
Furosemide:
Choices:
1. Flumazenil
2. Warfarin
3. Protamine sulfate
4. Vitamin K
Answer: 3 - Protamine sulfate
Explanations:
Protamine sulfate quickly terminates the action of heparin on a 1:1 mole
basis
Vitamin K is an antidote for warfarin poisoning
Flumazenil is an antidote for diazepam overdose
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Research Concepts:
Protamine:
Choices:
1. 100 ng per L
2. 300 ng per L
3. 500 ng per L
4. 700 ng per L
Answer: 1 - 100 ng per L
Explanations:
A BNP level greater than 650 ng per L is indicative of restriction
cardiomyopathy
BNP lower than 150 ng per L is indicative of constriction cardiomyopathy
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Research Concepts:
Constrictive Pericarditis:
Choices:
1. Absent P waves
2. Irregular ventricular rate
3. Rapid oscillation f waves
4. Wide QRS
Answer: 4 - Wide QRS
Explanations:
ECG in a patient with atrial fibrillation will show absent P waves, irregular
heart rate, and rapid oscillation f waves.
The ventricular response is usually irregular in atrial fibrillation.
The QRS is normal in patients with atrial fibrillation. Otherwise, the rhythm
would be similar to ventricular fibrillation.
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Research Concepts:
Atrial Fibrillation:
Choices:
1. Hypokalemia
2. Hypomagnesemia
3. Hyponatremia
4. Hypocalcemia
Answer: 1 - Hypokalemia
Explanations:
Sodium polystyrene sulfonate is a type of polymer and ionomer based on
polystyrene.
The mechanism of action is mediated by ion exchange of potassium with
sodium.
The resin absorbs 1 mEq of potassium per gram and releases 1 mEq of
sodium.
It is effective as a spermicide and a topical microbicide.
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Research Concepts:
Sodium Polystyrene Sulfonate:
Choices:
1. Amiloride
2. Furosemide
3. Acetazolamide
4. Spironolactone
Answer: 2 - Furosemide
Explanations:
Hyperuricemia can result from thiazide or loop diuretic therapy
Potent diuretics decrease urate excretion by increasing net urate
reabsorption
Volume depletion appears to play an important role in this response
Amiloride and spironolactone are potassium sparing diuretics
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Research Concepts:
Gout:
Furosemide:
Choices:
1. Left thoracotomy
2. Median sternotomy
3. Right thoracotomy
4. Partial sternal split
Answer: 3 - Right thoracotomy
Explanations:
In a patient with patent grafts and now needing a REDO for a valve, the
right thoracotomy provides excellent exposure.
The aorta can be cross-clamped but the best way to do the procedure is
under hypothermic fibrillatory arrest.
Left thoracotomy is another choice.
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Research Concepts:
Mitral Regurgitation:
Choices:
1. Inappropriate antibiotic
2. Under-dosing
3. Wrong timing of administration
4. Wrong site of administration
Answer: 3 - Wrong timing of administration
Explanations:
The most common error in prophylactic antibiotic administration is
erroneous timing in administration, which occurs in more than one third of
cases.
An effective antibiotic is selected in the majority of cases.
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Research Concepts:
Prophylactic Antibiotics:
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Research Concepts:
Aortic Arch:
Choices:
1. 10 minutes
2. 5 minutes
3. 2 minutes
4. 20 minutes
Answer: 2 - 5 minutes
Explanations:
After a person is without cardiopulmonary function for 4 to 6 minutes,
permanent brain damage is almost certain
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Research Concepts:
Anoxic Encephalopathy:
Circulatory Arrest:
Choices:
1. Coxsackievirus infections
2. Arenavirus infections
3. Echovirus infections
4. Enterovirus infections
Answer: 1 - Coxsackievirus infections
Explanations:
Coxsackie B viruses are cardiotropic and can infect myocytes.
Myocarditis can lead to dilated cardiomyopathy.
The mechanism of action is probably both direct viral cytotoxicity and
immune-mediated.
Adenovirus, cytomegalovirus (CMV), enterovirus, HIV, and parvovirus also
can be cardiotropic.
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Research Concepts:
Myocarditis, Viral:
Coxsackie Viruses:
Choices:
1. Decrease fever
2. Decrease pain in the chest
3. Decrease local discomfort caused by invasive procedures
4. Affect blood clotting
Answer: 4 - Affect blood clotting
Explanations:
Aspirin acts against platelet aggregation and impedes blood clotting.
Aspirin administration during the acute management of a myocardial
infarction may decrease mortality.
Aspirin is a non-opioid analgesic, non-steroidal anti-inflammatory,
antipyretic, anti-platelet medication. Although aspirin is an antipyretic, it
would not be given for this reason in this client's situation.
Aspirin is an analgesic. However, in this situation it would not be given for
its analgesic properties.
There is no indication that the client is having an invasive procedure.
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Research Concepts:
Aspirin:
Choices:
1. Change antibiotics
2. Continue antibiotics for a longer course
3. Consult surgery for excision of the valve without replacement
4. Consult surgery for endovascular resection of the vegetation
Answer: 3 - Consult surgery for excision of the valve without replacement
Explanations:
Once the infection is cleared, valve replacement can be considered.
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Research Concepts:
Endocarditis, Libman-Sacks:
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Research Concepts:
Cardiopulmonary Bypass:
Choices:
1. Lancisi
2. Austin flint
3. Ladin
4. Larrey
Answer: 1 - Lancisi
Explanations:
Lancisi's sign is usually a large V wave in the jugular wave tracing
It is due to an incompetent tricuspid valve
The V wave occurs when blood flows back into the jugular vein
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Research Concepts:
Tricuspid Regurgitation:
Choices:
1. Bethanechol
2. Prazosin
3. Oxybutynin
4. Atropine
Answer: 1 - Bethanechol
Explanations:
Urinary retention is a common complication during the post operative
period
Cholinergic stimulation helps to contract the detrusor muscle and relieve
the retention
Bethanechol is a cholinergic agent that is selective for M3 muscarinic
receptors
Oxybutynin is an anticholinergic used for treatment of urge incontinence
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Research Concepts:
Post-op Urinary Retention:
Bethanechol:
Choices:
1. Suctioning
2. Administration of oxygen
3. Administration of aspirin
4. Keeping airway open
Answer: 3 - Administration of aspirin
Explanations:
Nursing assessment of the patient at risk for acute respiratory failure is key
in preventing the disease
Some preventative measures include keeping the airway open, suctioning,
positioning, administration of oxygen and aerosol therapy
Administration of aspirin is not a preventative measure with regards to
acute respiratory failure
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Research Concepts:
Respiratory Distress/Failure:
Choices:
1. Bronchitis
2. Pleuritis
3. Pulmonary edema
4. Asthma
Answer: 3 - Pulmonary edema
Explanations:
Alveolar-arterial oxygen gradient increases when there is pathologic
shunting.
This can be caused by atelectasis, pneumonia, or pulmonary edema leading
to under ventilation of alveoli.
The alveolar-arterial oxygen gradient is the difference between alveolar
PO2 and arterial PO2 and normally is 5 to 10 mm Hg.
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Research Concepts:
Alveolar to Arterial Oxygen Gradient:
Pulmonary Edema:
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Research Concepts:
Constipation:
Choices:
1. Splenomegaly
2. Liver involvement
3. Congestive heart failure
4. Erythema nodosum
Answer: 3 - Congestive heart failure
Explanations:
Sarcoidosis is a multisystem disease that most commonly involves the
lungs.
Only 2 to 9% of patients have clinical evidence of cardiac involvement.
20% of patients have cardiac involvement on autopsy. Congestive heart
failure is a rare complication.
Splenic involvement, not always symptomatic, is found in over half of
sarcoidosis patients. The liver is involved with sarcoidosis by biopsy in 60-
90%, but most are asymptomatic, only 20-30% showing clinical liver
involvement.
Sarcoidosis involves the skin in about 25%, with erythema nodosum being
the most common presentation.
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Research Concepts:
Sarcoidosis:
Choices:
1. Captopril
2. Metoprolol
3. Nifedipine
4. Aspirin
Answer: 2 - Metoprolol
Explanations:
Beta blockers are common medications used in patients with hypertension.
Beta blockers are not indicated in patients with severe peripheral vascular
disease.
Blocking beta receptors leads to unopposed alpha action and severe
vasoconstriction.
Beta blockers are also not recommended in patients with a history of
asthma.
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Research Concepts:
Beta-Blockers:
Choices:
1. Mycardial infarction
2. Dressler syndrome
3. Pleuritis
4. Pneumonia
Answer: 2 - Dressler syndrome
Explanations:
Dressler syndrome is a secondary form of pericarditis.
Dressler often occurs after a myocardial infarction (MI) and due to
inflammation of the pericardium.
Dressler is self-limiting and may present with low grade fever, chest pain,
and a friction rub.
Dressler tends to occur 7-14 days after an MI and may present with
elevated ESR.
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Research Concepts:
Dressler Syndrome:
Choices:
1. Increased
2. Decreased
3. Same
4. No relationship
Answer: 1 - Increased
Explanations:
Insulin requirement is increased due to stress response.
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Research Concepts:
Diabetes Mellitus, Type 2:
Choices:
1. IMA has faster atherosclerosis
2. IMA experiences spasm
3. IMA and artery diameter are less equal
4. IMA thrombosis is more common
Answer: 2 - IMA experiences spasm
Explanations:
Patency at 10 years is greater than 90% for IMA grafts and only 40% SVG.
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Research Concepts:
Coronary Artery Bypass Graft:
Choices:
1. Procaine
2. Lidocaine
3. Bupivacaine
4. Tetracaine
Answer: 2 - Lidocaine
Explanations:
Lidocaine is a local anesthetic with anti arrhythmic properties
Lidocaine is classified as a class 1b anti arrhythmic drug and is used for
ventricular arrhythmias
Lidocaine is also effective in treating jellyfish stings
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Research Concepts:
Antiarrhythmic Medication:
Local Anesthetics:
Choices:
1. Melanoma
2. Squamous cell carcinoma
3. Angiosarcoma
4. Myxoma
Answer: 3 - Angiosarcoma
Explanations:
Cardiac sarcomas are the most common primary malignant tumors of the
heart.
It should be noted that metastatic tumors are 30 times more common than
primary heart tumors.
Angiosarcomas can occur in any age group and often occur in the right
ventricle.
The symptoms may vary from chest pain, dyspnea, tachycardia, and
hypertension. The prognosis is very poor.
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Research Concepts:
Angiosarcoma:
Choices:
1. Males
2. Diabetics
3. Young adults
4. Hypertensives
Answer: 2 - Diabetics
Explanations:
Diabetic patients are at increased risk for surgery.
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Research Concepts:
Surgery, Risks:
Choices:
1. Left atrium
2. Right atrium
3. Left ventricle
4. Right ventricle
Answer: 2 - Right atrium
Explanations:
The cardiomediastinal silhouette normally occupies half of the chest width.
The right border is formed by the right atrium.
The left atrium is the most posterior cardiac chamber. The left ventricle is
left border forming, and the right ventricle is the most anterior cardiac
chamber.
The right heart border, along the cardiophrenic angle, is a common location
to see a pericardial cyst.
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Research Concepts:
Chest Radiograph:
Choices:
1. Aspirin associated risks are greater than benefit in these patients
2. Patients can present with confusion only
3. Beta blockers are contraindicated due to the high incidence of AV nodal
disease
4. Males are 3 times more likely than females to have an MI in this group
Answer: 2 - Patients can present with confusion only
Explanations:
The elderly can present with atypical symptoms including CVA, confusion,
or a silent MI
Aspirin and beta blocker are both useful for this group
Males are only 1.5 times more likely than females to have an MI in this age
group
Greater than 85 of patients that die from CAD are over 65 years
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Research Concepts:
Acute Myocardial Infarction:
Choices:
1. Apomorphine
2. Ondansetron
3. Metoclopramide
4. Prochlorperazine
Answer: 2 - Ondansetron
Explanations:
Ondansetron is a 5HT3 receptor blockers and widely used to treat nausea
and vomiting
Ondansetron is used to treat the severe nausea and vomiting which occurs
in patients receiving cancer chemotherapy
Because of expense, the use of this drug is limited for routine nausea and
vomiting
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Research Concepts:
Ondansetron:
Choices:
1. Ezetimibe
2. Colesevelam
3. Simvastatin
4. Niacin
Answer: 3 - Simvastatin
Explanations:
Simvastatin is an HMG-CoA reductase inhibitor, commonly known as a
"statin." It is a first-line medication in the treatment of hyperlipidemia.
Statins have been shown to decrease LDL, triglycerides, and coronary
events.
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Research Concepts:
Hyperlipidemia:
Choices:
1. Administer radiation
2. Surgical excision
3. Reduce dose of immunosuppression
4. Increase dose of chemotherapeutic drugs
Answer: 3 - Reduce dose of immunosuppression
Explanations:
The first step of management in patients with post-transplant lymphomas is
to reduce the dose of immunosuppression.
Most centers reduce the dose of cyclosporine.
Corticosteroids are usually continued.
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Research Concepts:
Posttransplantation Lymphoproliferative Disorders:
Choices:
1. 40-120 mmHg
2. 50-130 mmHg
3. 60-160 mmHg
4. 90-180 mmHg
Answer: 3 - 60-160 mmHg
Explanations:
Coronary perfusion pressure (CorPP)= Aortic diastolic pressure (AoDP) -
Left ventricular end diastolic pressure (LVEDP).
LVEDP reflects the pulmonary capillary wedge pressure (PCWP).
Coronary blood flow is largely determined by myocardial metabolism.
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Research Concepts:
Cardiac Physiology:
Choices:
1. A
2. C
3. E
4. K
Answer: 4 - K
Explanations:
Vitamin K is reduced with antibiotics
Results from reducing colonic bacteria
This can be important in patients on anticoagulation
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Research Concepts:
Antibiotics:
Antibiotics:
Vitamin K:
Choices:
1. Migraine headaches
2. Pulmonary hypertension
3. Induction of abortion
4. Prevention of closure of a patent ductus
Answer: 1 - Migraine headaches
Explanations:
Bosentan, a prostaglandin analog is used for pulmonary hypertension
Prostaglandins can induce abortion and preterm labor
It can also be used to keep a patent ductus open
Some prostaglandins have a vasodilatory effect and may aggravate migraine
headaches
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Research Concepts:
Prostaglandins:
Choices:
1. Decreased the risk for first acute major coronary events
2. Reduced HDL-C levels
3. Increased LDL-C levels
4. None of the above
Answer: 1 - Decreased the risk for first acute major coronary events
Explanations:
Lovastatin reduced the risk for first acute major coronary event in men and
women with average TC and LDL-C levels and below average HDL-C
levels.
First acute major coronary events defined as fatal or nonfatal MI, unstable
angina or sudden cardiac death.
Lovastatin reduced LDL-C levels by 25%. It also increased HDL-C levels
by 6% .
AFCAPS/TexCAPS Downs JR et al. JAMA 1998;279:1615-1622
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Research Concepts:
Statin Medication:
Explanations:
Rheumatic heart disease still accounts for many cases of endocarditis in
immigrant populations. However, in the elderly it is calcific aortic stenosis
that is the common pathology
Congenital heart defects can also acquire IE and bicuspid aortic valve is the
most common. Of all the congenital heart defects, ASD is least affected by
IE
The biggest risk factor for IE is residual valve damage caused from a
previous attack of rheumatic fever
In IV drug abusers, there are never any underlying valve abnormalities
visualized and the majority of cases involve the tricuspid valve
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Research Concepts:
Endocarditis, Infectious:
Choices:
1. Granulation tissue
2. Necrosis of myocardium and infiltrates of polymorphonuclear leukocytes
3. Lymphocytic infiltrate
4. Excessive calcium accumulation
Answer: 2 - Necrosis of myocardium and infiltrates of polymorphonuclear
leukocytes
Explanations:
Autopsy done within 24-48 hrs after an MI will typically reveal
accumulation of PMNs, as well as some necrosis.
On gross examination, the infarct is usually not identifiable within the first
12 hours.
After the first 5-7 days, the necrotic areas are invaded by granulation tissue.
Ultimately, the infarct is replaced by a scar.
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Research Concepts:
Myocardial Infarction, Acute:
Choices:
1. Papilledema
2. Hyperthyroidism
3. Thrombocytopenia
4. None of the above
Answer: 1 - Papilledema
Explanations:
Papilledema must be present for a diagnosis of malignant hypertension
Hyperthyroidism can cause hypertension, but does not need to be present
for a definitive diagnosis
Thrombocytopenia is not related to malignant hypertension
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Research Concepts:
Hypertension, Malignant:
Choices:
1. Abciximab
2. Ticlopidine
3. OKT3
4. Hirudin
Answer: 1 - Abciximab
Explanations:
Abciximab is a glycoprotein IIb/IIIa receptor antagonist and a monoclonal
antibody.
It is used to decrease platelet aggregation in patients with unstable angina or
undergoing percutaneous coronary intervention.
It is also used off label in conjunction with thrombolytics.
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Research Concepts:
Antiplatelet Medications:
Abciximab:
Choices:
1. Headache
2. Hypotension
3. Diarrhea
4. Dizziness
Answer: 3 - Diarrhea
Explanations:
Nitroglycerin can cause a headache, dizziness and hypotension
These side effects are related to its vasodilating properties
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Research Concepts:
Nitroglycerin:
Side Effects:
Choices:
1. Epinephrine
2. Isoproterenol
3. Dobutamine
4. Norepinephrine
Answer: 2 - Isoproterenol
Explanations:
Isoproterenol is frequently used as an IV drip to pace the transplanted heart
The transplanted heart is devoid of any neural activity since the nerves have
been transected
Isoproterenol can also be used to for serious episodes of heart block and
Adams-Stokes attacks (except when caused by ventricular tachycardia or
fibrillation)
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Research Concepts:
Heart Transplantation:
Choices:
1. Approximately 10% of health-care workers experience some form of
allergic reaction to latex
2. Latex is not found in catheters
3. Persons allergic to latex also may be sensitive to fruits such as bananas,
kiwis, pears, pineapples, grapes, and papayas
4. Latex allergies became an important problem with the institution of
universal precautions
Answer: 2 - Latex is not found in catheters
Explanations:
Latex allergy is a significant problem as up to 17% of health-care workers
have allergic reactions to latex.
Reactions can vary from contact dermatitis to anaphylaxis.
Latex can be found in catheters, gloves, and many other medical supplies.
Those allergic to latex may be sensitive to kiwis, bananas, grapes,
pineapples, and papayas.
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Research Concepts:
Latex Allergy:
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Research Concepts:
Marfan Syndrome:
Choices:
1. Prostaglandin
2. Leukotriene
3. Thromboxane
4. Histamine
Answer: 1 - Prostaglandin
Explanations:
Prostaglandin release during niacin use is responsible for the flushing side
effect that is frequently seen
This is why aspirin can easily reduce the symptoms if given before niacin
administration
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Research Concepts:
Niacin:
Choices:
1. Administration of methylene blue
2. Administration of sodium thiosulfate
3. Administration of 100% oxygen
4. Use of a hyperbaric chamber
Answer: 1 - Administration of methylene blue
Explanations:
Nitroglycerin can cause cyanosis by production of methemoglobinemia and
can be fatal.
Methemoglobin levels can be measured. Treatment is by administering
methylene blue.
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Research Concepts:
Methemoglobinemia:
Nitroglycerin:
Choices:
1. Hypertrophic cardiomyopathy
2. Cardiac atrophy
3. Hypotension
4. Supraventricular tachycardia
Answer: 2 - Cardiac atrophy
Explanations:
Older adults are at risk for changes in the myocardium secondary to
deconditioning.
The left ventricle will have decreased ability to respond to increased
demands.
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Research Concepts:
Cardiac Atrophy:
Choices:
1. Tetralogy of Fallot
2. Ventricular septal defect
3. Patent ductus arteriosus
4. Coarctation of the aorta
Answer: 3 - Patent ductus arteriosus
Explanations:
Congenital rubella is associated with patent ductus arteriosus (PDA) and
peripheral pulmonary artery stenosis.
The murmur of a patent ductus arteriosus is a continuous "washing
machine" murmur best heard over the left upper sternal border.
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Research Concepts:
Patent Ductus Arteriosus:
Congenital Rubella:
Choices:
1. Celecoxib
2. Famotidine
3. Phenelzine
4. Captopril
Answer: 4 - Captopril
Explanations:
Captopril can increase bradykinin levels by inhibiting angiotensin
converting enzyme
Celecoxib is a COX-2 inhibitor
Famotidine is an H2 blocker
Phenelzine is a non-selective MAO inhibitor
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Research Concepts:
Bradykinin:
ACE Inhibitors:
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Research Concepts:
Congestive Heart Failure And Pulmonary Edema:
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Research Concepts:
Meleney Gangrene:
Meleney Gangrene:
Choices:
1. Aortic valve replacement
2. High dose digoxin
3. Echocardiogram
4. Cardiac catheterization
Answer: 4 - Cardiac catheterization
Explanations:
Patient with symptomatic aortic regurgitation needs AVR
Perform cardiac catheterization first
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Research Concepts:
Aortic Regurgitation:
Choices:
1. Obesity
2. Age greater than 75
3. Male sex
4. Distant smoking history
Answer: 1 - Obesity
Explanations:
Obesity increases risk of pulmonary complications whereas as age often is
associated preexisting comorbid conditions but does not increase operative
risk on its own
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Research Concepts:
Obesity:
Operative Risk:
Choices:
1. When there is sweating
2. When the temperature increases
3. When the heart rate increases
4. When the blood pressure drops by more than 10 mmHg
Answer: 4 - When the blood pressure drops by more than 10 mmHg
Explanations:
The stress test should be halted if there is onset of chest pain, a drop in
blood pressure of more than 10 mmHg, there is dyspnea, or ST segment
elevation or depression.
Other indications to stop the stress test include syncope, dizziness, or ST
elevation of at least 1 mm.
Presence of VT or numerous PVCs should also be an indication to stop the
test.
If the patient does not feel well, stop the test.
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Research Concepts:
Treadmill Stress Testing:
Choices:
1. Bipivicaine
2. Articaine
3. Tetracaine
4. Etidocaine,
Answer: 3 - Tetracaine
Explanations:
Lidocaine is an amide anesthetic and so no amides should be used in this
case. Other amides include bupivacaine, etidocaine, cinchocaine, and
articaine.
Esther anesthetics are good alternatives if a patient is allergic to amides.
These include benzocaine, procaine, chloroprocaine, cocaine,
cyclomethycaine, piperocaine, and tetracaine.
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Research Concepts:
Local And Regional Anesthesia:
Choices:
1. Aortic arch 1
2. Aortic arch 2
3. Aortic arch 3
4. Aortic arch 4
Answer: 3 - Aortic arch 3
Explanations:
The first arch gives rise to the external carotid arteries.
The second arch regresses.
The third pair of arches make up the proximal part of internal carotid
arteries.
The fourth arch on the left forms the aortic arch and on the right forms the
right subclavian artery.
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Research Concepts:
Great Vessel Embryology:
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Research Concepts:
Abscess:
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Research Concepts:
Hyperventilation:
Choices:
1. Stress
2. Exercise
3. Dream
4. Hyperthermia
Answer: 3 - Dream
Explanations:
Sleeping is the least energy consuming activity
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Research Concepts:
Coronary Artery Disease:
Choices:
1. Lethargic
2. Delirious
3. Dissociative
4. Psychotic
Answer: 2 - Delirious
Explanations:
Delirium is characterized by state of confusion with hallucination.
Lethargic patients have a lowered level of consciousness, with drowsiness,
listlessness, and apathy. It is not characterized by hallucinations.
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Research Concepts:
Delirium:
Choices:
1. Young
2. Pregnant
3. Male
4. Old
Answer: 2 - Pregnant
Explanations:
Pregnancy is absolutely contraindicated in Eisenmenger syndrome
Mortality rates is over 50 percent
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Research Concepts:
Eisenmenger Syndrome:
Pregnancy:
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Research Concepts:
Heart Failure, Congestive:
Choices:
1. Norepinephrine
2. Cocaine
3. Dopamine
4. Dobutamine
Answer: 2 - Cocaine
Explanations:
Cocaine prevents reuptake of catecholamines resulting in higher
sympathetic tone triggering arrhythmias.
It also probably had direct effects on cardiac muscle.
It is theorized that cocaine alters myocardial automaticity directly, that it
causes central autonomic dysregulation with increased neurohumoral and
adrenergic stimulation, and that it causes vasospasm and ischemia.
This results in electrical disturbances and potentiates re-entrant arrhythmia.
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Research Concepts:
Toxic, Cocaine:
Choices:
1. Drug
2. Surgical manipulation
3. Shock
4. Anesthesia
Answer: 2 - Surgical manipulation
Explanations:
Atrial fibrillation post maze procedure is due to surgical manipulation
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Research Concepts:
Atrial Fibrillation:
Choices:
1. Tachycardia
2. Bronchospasm
3. Decreased urine output
4. Hypotension
Answer: 1 - Tachycardia
Explanations:
Epinephrine is a sympathomimetic medication.
It causes tachycardia and bronchodilation.
Low doses may cause a decrease in blood pressure due to peripheral
vasodilation.
However, moderate and high doses cause hypertension.
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Research Concepts:
Epinephrine:
Choices:
1. Begin administration of prostaglandin E1
2. Obtain an electrocardiogram
3. Begin administration of 100% oxygen
4. Call cardiology for an emergency consultation
Answer: 1 - Begin administration of prostaglandin E1
Explanations:
Cyanosis in a newborn that does not improve with 100% oxygen is most
probably due to congenital heart disease
There is most likely a right to left shunt, secondary to obstruction of the
blood flow from the right ventricle
The patient requires immediate intervention to prevent hypoxic ischemic
damage. Prostaglandin E1 opens the ductus arteriosus and allows enhanced
pulmonary blood flow improving oxygenation.
A cardiology consult should be obtained after urgent treatment
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Research Concepts:
Congenital Heart Disease:
Choices:
1. Sodium polystyrene sulfonate
2. Loop diuretics and intravenous fluids
3. Hemodialysis
4. Spiral CT of the chest
Answer: 2 - Loop diuretics and intravenous fluids
Explanations:
Hypercalcemia shortens the duration of repolarization
It is treated with loop diuretics and fluids
Hemodialysis is not needed in most cases
Hyperkalemia would show peaked T waves not shortening of the ST
segment
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Research Concepts:
Hypercalcemia:
Rhabdomyolysis:
Choices:
1. Metoprolol
2. Furosemide
3. Captopril
4. Clonidine
Answer: 4 - Clonidine
Explanations:
Congestive heart failure is the inability of the heart to supply sufficient
blood flow to meet the needs of the body.
Treatments include medications (ACE inhibitors, ARBs, beta blockers,
spironolactone, diuretic and digoxin), devices (implantable defibrillator or
biventricular pacemakers) and transplantation.
African American patients have improved prognosis when treated with
hydralazine and nitrates
Clonidine is a direct-acting alpha-2 adrenergic agonist that is used to treat
hypertension, neuropathic pain, opioid detoxification and migraine
headaches.
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Research Concepts:
Heart Failure, Congestive:
Choices:
1. Mask
2. Mask and eye protection
3. Mask, eye protection, and gloves
4. Mask, eye protection, gloves, and gown
Answer: 2 - Mask and eye protection
Explanations:
Droplet precautions mean that the patient's secretions in droplet form are
contagious
These droplets do not travel more than 3 feet
Healthcare workers should wear masks and eye protection when working
with these patients
The patient should wear a mask if being moved about the facility
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Research Concepts:
Droplet Precautions:
Choices:
1. Warfarin prophylaxis
2. Repeat TTE in one year
3. TEE and surgical consult
4. Watchful waiting and endocarditis prophylaxis
Answer: 3 - TEE and surgical consult
Explanations:
Patients with severe gradual onset mitral valve regurgitation with ejection
fraction <50% should undergo a more definitive transesophageal
echocardiogram in preparation for possible valve replacement surgery
Endocarditis prophylaxis is advisable but surgical consult should not be
delayed
As there is no indication of atrial fibrillation there is no need for
anticoagulation
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Research Concepts:
Mitral Regurgitation:
Choices:
1. Locked-in syndrome
2. Vegetative state
3. Central pontine myelinolysis
4. Severe depression
Answer: 2 - Vegetative state
Explanations:
The patient has no evidence of cognitive function but has sustained
autonomic activity
This can occur secondary to severe damage to the cerebral cortex and intact
brainstem
MRI will reveal the ischemic damage to the cerebral cortex
Protracted hypoxemia or near drowning can cause this condition
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Research Concepts:
Vegetative State:
Choices:
1. Quinolones
2. Sulfonamides
3. Imipenem
4. Aminoglycosides
Answer: 2 - Sulfonamides
Explanations:
Pseudomonas is resistant to many antibiotics. When antibiotics are used
empirically, cultures should be obtained and then the choice of antibiotic
narrowed.
Currently, imipenem and quinolones are used in combination with
aminoglycosides to treat Pseudomonas infections.
Other methods to prevent resistance include probiotic prophylaxis, which
may delay onset of pseudomonas infection in the intensive care unit.
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Research Concepts:
Pseudomonas Infection:
Choices:
1. The medication may cause bradycardia
2. The medication may cause a drop in blood pressure
3. The medication cannot cause angina
4. The medication is contraindicated while taking sublingual nitroglycerin
Answer: 2 - The medication may cause a drop in blood pressure
Explanations:
Amlodipine besylate (Norvasc) may cause a drop in blood pressure.
Amlodipine besylate is an anti-hypertensive and anti-anginal medication.
It decreases myocardial contractility and oxygen demand by inhibiting the
transport of calcium ions into myocardial and smooth muscle cells. It is
important to teach patients about potential postural hypotension and
measures that avoid syncope or faintness that may occur with sudden
position changes.
Amlodipine besylate (Norvasc) may cause palpitations that are perceptible
to the patient, but does not cause bradycardia. Amlodipine besylate
(Norvasc) can cause angina.
Amlodipine besylate (Norvasc) causes a decrease in frequency and severity
of angina attacks because of its coronary vasodilatory effects. Patient Need:
Health Promotion/Maintenance
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Research Concepts:
Calcium Channel blockers:
Choices:
1. Digoxin
2. Lidocaine
3. Amlodipine
4. Nifedipine
Answer: 1 - Digoxin
Explanations:
Digoxin is the only drug mentioned from the above list that can reduce A-V
node conduction
Lidocaine is a class I antiarrhythmic that is preferred for use in myocardial
infarction
Amlodipine and nifedipine do not affect AV node function
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Research Concepts:
Digoxin:
Choices:
1. It is probably a laboratory error
2. Type A
3. Type B
4. Both type A and type B
Answer: 3 - Type B
Explanations:
Catecholamines are known to cause type B lactic acidosis (not associated
with tissue hypoxia).
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Research Concepts:
Inotropes And Vasopressors:
Lactic Acidosis:
Choices:
1. Aortic stenosis
2. Aortic regurgitation
3. Atrial septal defect
4. Tricuspid stenosis
Answer: 1 - Aortic stenosis
Explanations:
Patients with tricuspid stenosis often develop large A waves in the jugular
veins
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Research Concepts:
Tricuspid Stenosis:
Choices:
1. Tachypnea
2. Tachycardia
3. Sudden onset
4. Fever
Answer: 4 - Fever
Explanations:
Fever is not a characteristic of acute PE
Tachypnea, tachycardia and sudden onset are characteristics of acute PE
pulmonary embolism
Chest pain may also be a characteristic of acute PE
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Research Concepts:
Pulmonary Embolism:
Choices:
1. Partial heart bypass with left lung collapse
2. Use of Gott shunt
3. Clamp and sew technique with left lung collapse
4. Femoral-femoral bypass
Answer: 4 - Femoral-femoral bypass
Explanations:
With the right lung damaged, poor oxygenation will occur with one-lung
ventilation (as you have already collapsed the left lung to get exposure to
the thoracic aorta).
Both the Gott shunt and partial heart bypass cannot fully oxygenate the
patient. The patient will need complete bypass and so femoral-femoral
bypass is the technique used.
A femoral-femoral bypass will require full anti-coagulation, but one may
use heparinized-coated catheters.
Stenting may be helpful in such a situation.
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Research Concepts:
Chest Trauma:
Choices:
1. Elevated white blood cell count
2. Decreased hemoglobin
3. Elevated blood urea nitrogen (BUN) and creatinine
4. Hyperkalemia
Answer: 3 - Elevated blood urea nitrogen (BUN) and creatinine
Explanations:
The results of blood work during an attack of hereditary angioedema are
normal.
The condition results in intravascular fluid sequestration and thus a patient
will show elevated hematocrit or evidence of prerenal failure.
The levels of eosinophils or erythrocyte sedimentation rate are not elevated
in hereditary angioedema.
Levels of complement factors C3 and C1q are normal but C4 may be low.
Sometimes a bowel obstruction may be observed during an attack.
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Research Concepts:
Hereditary Angioedema:
Choices:
1. Hold next dose of warfarin, give Vitamin K, repeat INR, restart lower dose
warfarin
2. Investigate dietary habits and check for antibodies to heparin
3. Stop warfarin, give FFP, Vitamin K, PCC, repeat INR
4. Hold next dose of warfarin, repeat INR, restart lower dose warfarin
Answer: 3 - Stop warfarin, give FFP, Vitamin K, PCC, repeat INR
Explanations:
In a patient with elevated INR<5 without bleeding the next dose of warfarin
should be held and INR rechecked the following day
In the nonbleeding patient with INR 5-9, Vitamin K should also be added
In the nonbleeding patient with INR 9-20, Vitamin K should be given, and
warfarin held until INR is 2-3
In the nonbleeding patient with INR>20, or if the patient is bleeding,
warfarin should be stopped, and Vitamin K, FFP, PCC given
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Research Concepts:
Warfarin:
Choices:
1. Pupillary dilation
2. Excessive salivation
3. Tachycardia
4. Urinary retention
Answer: 2 - Excessive salivation
Explanations:
Atropine is an anticholinergic that is often used prior to surgery to dry up
secretions
Pupillary dilation, tachycardia, and urinary retention are some side effects
of atropine
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Research Concepts:
Atropine:
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Electrocardiogram:
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Ventricular Septal Defect:
Choices:
1. Less glucose requirement
2. Less oxygen demand
3. Increases blood flow
4. Increases vascular resistance
Answer: 3 - Increases blood flow
Explanations:
In hypothermia state, there is reduced glucose and oxygen demand.
Cerebral blood flow also drops.
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Hypothermia:
Choices:
1. Increase cardiac output
2. Decrease intrathoracic pressure
3. Increase venous return
4. Increase functional residual capacity
Answer: 4 - Increase functional residual capacity
Explanations:
PEEP shifts lung water from alveoli not the perivascular interstitial space
PEEP can help recruitment of alveoli
PEEP prevents a decrease in FRC
PEEP can increase intrathoracic pressure and decreased venous return
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Research Concepts:
Positive End-Expiratory Pressure (PEEP):
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Hyperkalemia:
Hyperkalemia:
Choices:
1. Internal intercostals
2. Diaphragm
3. External intercostals
4. Abdominal intercostals
Answer: 2 - Diaphragm
Explanations:
The diaphragm is the most important muscle during inspiration.
The external intercostals also participate in inspiration.
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Research Concepts:
Phrenic Nerve:
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Research Concepts:
Phrenic Nerve Injury:
Diaphragm Disorders:
Choices:
1. Extensive pulmonary parenchymal disease
2. Muscular atrophy of the diaphragm
3. Phrenic nerve paralysis after congenital heart surgery
4. Diabetic with high quadriplegia
Answer: 4 - Diabetic with high quadriplegia
Explanations:
An intact phrenic nerve in quadriplegic diabetics is not a contraindication to
pacing.
If the lung is diseased or the diaphragm muscle atrophied, or if there is
temporary phrenic nerve paralysis after a coronary artery bypass graft,
pacing is not indicated.
When the diaphragm is paced, a permanent tracheostomy is needed to
prevent upper airway obstruction from discoordinated diaphragmatic and
laryngeal muscle activity.
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Research Concepts:
Diaphragmatic Pacing:
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Research Concepts:
Amiodarone:
Choices:
1. Prominent pulmonary arteries
2. Right ventricular distension
3. Pulmonary edema
4. Elevated left main stem bronchus
Answer: 3 - Pulmonary edema
Explanations:
Chest radiograph may show left atrial, right ventricle, and pulmonary artery
enlargement.
Rarely calcification may be visible on the mitral valve annulus.
Pulmonary edema is rarely seen on CXR in this context.
The left atrium sits below the left mainstem bronchus. So left atrial
enlargement can cause an elevation of the left main stem bronchus. The
patient may have a constant cough.
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Research Concepts:
Mitral Stenosis:
Choices:
1. Smokers had more frequent ischemic episodes of a shorter duration when
compared to nonsmokers
2. Nonsmokers had less frequent ischemic episodes of a longer duration when
compared to smokers
3. Smokers had more frequent ischemic episodes of a longer duration when
compared to nonsmokers
4. Nonsmokers had more frequent ischemic episodes of shorter duration when
compared to smokers
Answer: 3 - Smokers had more frequent ischemic episodes of a longer
duration when compared to nonsmokers
Explanations:
Cigarette smoking is an established risk factor for CAD
Patients with CAD who smoked had a frequency of angina 3X greater and a
duration 12X greater than those nonsmokers with CAD
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Research Concepts:
Smoking:
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Research Concepts:
Cyanosis:
Choices:
1. Prazosin
2. Minoxidil
3. Metoprolol
4. Diltiazem
Answer: 2 - Minoxidil
Explanations:
Minoxidil is a vasodilator used in the treatment of hypertension.
Reflex tachycardia can occur with minoxidil. Concomitant use of a beta-
blocker is required.
Minoxidil can lead to water retention and should be used with caution in
patients with congestive heart failure.
Minoxidil can cause hypertrichosis (growth of hair) and has been used in
the treatment of male pattern baldness.
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Research Concepts:
Antihypertensive Medications:
Choices:
1. Pulmonary hypertension
2. Left bundle branch block
3. Mitral stenosis
4. Aortic insufficiency
Answer: 2 - Left bundle branch block
Explanations:
When P2 precedes A2 such that the split is maximized in expiration and
decreases in inspiration there is paradoxical splitting of S2
A fixed split in S2 is seen with atrial septal defect
A loud P2 is seen with pulmonary hypertension
Delayed excitation of the left ventricle as in left bundle block causes the
paradoxical splitting of S2
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Research Concepts:
Bundle Branch Block, Left:
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Research Concepts:
Hirudin:
Choices:
1. Verbal disappointment directed at the patient regarding the behaviors
2. Explanation of why the behaviors are risk factors for coronary artery
disease
3. Warning the patient of the chances of heart attacks and heart failure should
the patient continue their behaviors
4. Verbal praise for changing their behaviors which put them at risk for
coronary artery disease
Answer: 4 - Verbal praise for changing their behaviors which put them at
risk for coronary artery disease
Explanations:
A basic principle of behavior modification is that behavior is learned.
New behavior is more likely to persist if it is rewarded.
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Research Concepts:
Primary And Secondary Prevention Of Coronary Artery
Disease:
Choices:
1. Methicillin
2. Sulfonamides
3. Asprin
4. Neomycin
Answer: 4 - Neomycin
Explanations:
Hypersensitivity reaction is the most common cause of interstitial nephritis.
Interstitial nephritis can be caused by drugs, penicillins, sulfa drugs, and
nonsteroidal anti-inflammatory drugs.
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Research Concepts:
Nephritis, Interstitial:
Choices:
1. Ramipril
2. Hydrochlorothiazide
3. Amlodipine
4. Metoprolol
Answer: 4 - Metoprolol
Explanations:
A patient with hypertension and angina should be on a beta blocker.
An ACE inhibitor should be added, if possible.
If needed a low dose of a thiazide diuretic would be the next step.
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Research Concepts:
Essential Hypertension:
Angina, Stable:
Choices:
1. Atrial septal defect
2. Patent ductus arteriosus
3. Coarctation of aorta
4. Ventricular septal defect
Answer: 2 - Patent ductus arteriosus
Explanations:
Continuous machinery murmur occurs if there is communication in the
circulation and continuous pressure gradient through the cardiac cycle.
Continuous murmurs are often loudest during late systole. This finding
often helps the examiner discriminate between a continuous murmur and an
ejection murmur associated with an early diastolic murmur.
Possible causes of a continuous murmur include pulmonary artery to aorta
communication as in patent ductus arteriosus with is maximal inferior to the
left clavicle.
Another rare cause of continuous murmur includes a coronary artery fistula.
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Research Concepts:
Patent Ductus Arteriosus:
Choices:
1. Renal excretion of sodium
2. Glomerular filtration rate
3. Blood flow in the lower body
4. Plasma levels of angiotensin II
Answer: 4 - Plasma levels of angiotensin II
Explanations:
The coarctation is proximal to the kidneys, resulting in activation of the
renin-angiotensin system.
Activation of this system would result in increased angiotensin II and
decreased renal excretion of sodium.
The arterial pressure would be decreased in the lower body.
Glomerular filtration would be reduced compared to a patient with a normal
aorta.
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Research Concepts:
Aortic Coarctation:
Choices:
1. Chest compressions
2. Calling 911
3. Aspirin
4. External electrical defibrillation
Answer: 4 - External electrical defibrillation
Explanations:
External electrical defibrillation with AEDs is the most successful treatment
modality for VF
ACLS is indicated in the setting of VF
It is recommended to use the minimum amount of energy required to
achieve defibrillation
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Research Concepts:
Ventricular Fibrillation:
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Research Concepts:
Heart Anatomy:
Choices:
1. Echocardiography every 6 months
2. Daily weights with care by a multidisciplinary team
3. Long term skilled nursing care
4. Dabigatran
Answer: 2 - Daily weights with care by a multidisciplinary team
Explanations:
It has been shown that regular monitoring of a patient with CHF allows
initiating care before hospitalization is required
Multidisciplinary teams with active patient involvement has shown to be
most effective
Periodic echocardiograms do not make a difference
Many medications decrease exacerbations and hospitalizations but not
dabigatran
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Research Concepts:
Heart Failure, Congestive:
Multidisciplinary Team:
Choices:
1. Pressures with in the different heart chambers
2. Carbon dioxide concentration of the blood in different heart chambers
3. Degree of methemoglobinemia, if any
4. Wall motion abnormalities of the left ventricle
Answer: 1 - Pressures with in the different heart chambers
Explanations:
The pulmonary capillary wedge pressure reflects the left ventricular end-
diastolic pressure and guides the physician in determining fluid
management for the patient
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Research Concepts:
Pulmonary Artery Catheterization:
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Research Concepts:
Aortic Stenosis:
Choices:
1. No coronary revascularization procedure
2. Unsuccessful coronary revascularization
3. Successful coronary revascularization
4. Recurring anginal symptoms after revascularization
Answer: 3 - Successful coronary revascularization
Explanations:
ACC/AHA guidelines recommend the continuation of anti-ischemic
medications after revascularization in all, except those undergoing
successful procedures
All UA/NSTEMI patients should receive prescriptions for nitroglycerin
upon discharge
Easily understandable medication directions should also be provided
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Research Concepts:
Angina, Unstable:
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Research Concepts:
Alcohol Withdrawal:
Choices:
1. In the myelinated area
2. Inside of nerve
3. Outside of nerve
4. Only the axon
Answer: 2 - Inside of nerve
Explanations:
Local anesthetics block from inside of the nerve cell in the unmyelinated
area.
Unmyelinated areas are known as the nodes of Ranvier.
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Research Concepts:
Local Anesthetics:
Choices:
1. There may be ECG changes
2. The SVR is usually low
3. Dopamine may be used for treatment
4. The JVP is elevated
Answer: 2 - The SVR is usually low
Explanations:
In carcinogenic shock, there may be many signs and symptoms. The patient
may develop a third heart sound and there maybe crackles on auscultation.
The myocardium usually is severely damaged and unable to pump blood.
Most patients have a low cardiac output, high SVR and an elevated JVP.
The condition is treated with drugs like dopamine, dobutamine, or
milrinone or an after load-reducing agent like ACEI.
Besides oxygen, other patients may benefit from intravenous morphine.
Some patient may benefit from an intra aortic balloon pump. However,
cardiogenic shock carries a very high mortality, irrespective of the type of
treatment.
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Research Concepts:
Shock, Cardiogenic:
Choices:
1. Immediate cardiac catheterization with likely stent placement
2. IV nitroprusside and an urgent transesophageal echocardiogram
3. IV morphine and nitrates, oxygen and aspirin
4. Serial cardiac enzymes and IV beta-blockers and heparin
Answer: 2 - IV nitroprusside and an urgent transesophageal echocardiogram
Explanations:
This case is suggestive of aortic dissection that can be diagnosed with
transesophageal echo
Beta-blockers are for rate control and nitroprusside for BP control
A proximal, Type A, dissection is associated with aortic insufficiency and
hypertension and requires urgent repair while a distal dissection is
associated with arterial obstruction leading to renal failure and bowel
ischemia
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Research Concepts:
Dissection, Aortic:
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Research Concepts:
Ticlopidine:
Choices:
1. ACE inhibitor
2. Thiazide
3. ASA
4. Calcium channel blocker
Answer: 4 - Calcium channel blocker
Explanations:
Congestive heart failure can be precipitated or exacerbated by beta
blockers, non-dihydropyridine calcium channel blockers, NSAIDS, and
alcohol.
These agents should be avoided if possible.
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Research Concepts:
Heart Failure, Congestive:
Choices:
1. Rheumatic fever
2. Degenerative disease
3. Endocarditis
4. Coronary heart disease
Answer: 2 - Degenerative disease
Explanations:
Mitral valve degenerative disease or myxomatous disease is the most
common cause of MR in America
All the chordae are thinned and elongated with billowing of the mitral valve
The posterior annular dilatation is symmetric and involves both
commissures equally
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Research Concepts:
Mitral Regurgitation:
Choices:
1. High hemoglobin
2. High WBC
3. High hematocrit
4. High platelet
Answer: 2 - High WBC
Explanations:
WBC correlates with mortality
CRP also correlates with mortality rate
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Research Concepts:
Acute Myocardial Infarction:
Leukocytosis:
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Research Concepts:
Digoxin Toxicity:
Choices:
1. Postpone surgery
2. Proceed with surgery
3. Start PO antibiotics
4. IV antibiotics
Answer: 1 - Postpone surgery
Explanations:
URI can lead to bronchospasm.
It is recommended to postpone elective surgery.
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Research Concepts:
Preoperative Evaluation And Management:
Choices:
1. Circumflex coronary artery
2. Aortic valve
3. AV node
4. SA node
Answer: 4 - SA node
Explanations:
All the structures above except the SA node may be damaged during mitral
valve surgery
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Research Concepts:
Mitral Valve Replacement:
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Research Concepts:
Tetralogy Of Fallot:
Choices:
1. Augmented perfusion of the heart
2. String sign
3. Improved ejection fraction
4. Occlusion of the coronary artery
Answer: 2 - String sign
Explanations:
Bypass of minimally stenosed vessels with an arterial conduit like the IMA
will result in competitive flow and cause atrophy of the arterial graft or a
string sign as seen on an angiogram.
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Research Concepts:
Internal Mammary Artery Bypass:
Choices:
1. Greater than 15 mm Hg
2. Lesser than 15 mm Hg
3. Greater than 5 mm Hg
4. Lesser than 5 mm Hg
Answer: 1 - Greater than 15 mm Hg
Explanations:
Cardiogenic shock is characterized by pulmonary arterial sedge pressure
greater than 15 mm Hg
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Research Concepts:
Cardiogenic Shock:
Choices:
1. Infectious endocarditis
2. Atrial myxomas
3. Mitral valve prolapse
4. Aortic stenosis
Answer: 3 - Mitral valve prolapse
Explanations:
Mitral valve prolapse is the most common valvular defect in children in the
United States.
Rheumatic valvular disease is the most common valvular disease in the
developing world.
Myxomas are usually found in the left atrium.
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Research Concepts:
Mitral Valve Prolapse:
Choices:
1. Aortic stenosis
2. Aortic regurgitation
3. Thoracic outlet syndrome
4. Raynaud's syndrome
Answer: 2 - Aortic regurgitation
Explanations:
A water hammer pulse is bounding and very forceful.
A water hammer pulse is often seen in aortic regurgitation because of the
increased stroke volume of the left ventricle.
The wide pulse pressure often results in large amount of blood being
pumped out during each heart beat.
Other disorders with water hammer pulse include PDA, pregnancy, fever,
and anemia.
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Research Concepts:
Aortic Regurgitation:
Choices:
1. Warfarin
2. Cryoprecipitate
3. Protamine
4. Vitamin K
Answer: 3 - Protamine
Explanations:
Protamine antagonizes the anticoagulant effects of heparin.
Protamine is derived from fish sperm and has a high arginine content.
The positively charged protein interacts with the negatively charged
heparin.
Adverse effects of protamine include hypersensitivity, bronchoconstriction,
flushing, and hypotension.
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Research Concepts:
Anticoagulation:
Choices:
1. Verapamil
2. Adenosine
3. Digoxin
4. None of the above
Answer: 2 - Adenosine
Explanations:
Adenosine blocks the conduction of impulses through the AV node.
Adenosine increases the efflux of potassium, hyperpolarizing the nodal
cells. It is effective in 90% of cases.
Procainamide and esmolol are other anti-arrhythmic medications that are
considered second line.
Patients should be checked for electrolyte imbalances, including
magnesium. Abnormalities should be corrected.
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Research Concepts:
Wolff-Parkinson-White Syndrome:
Choices:
1. Prophylactic antibiotics
2. Changing the line frequently
3. Aseptic technique for dressing changes
4. Avoid use for parenteral nutrition or transfusions
Answer: 3 - Aseptic technique for dressing changes
Explanations:
A central line needs to be handled using aseptic technique
Each lumen should be assigned on purpose
Prophylactic antibiotics are not of help
Changing the line frequently introduces other risks
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Research Concepts:
Central Line Management:
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Research Concepts:
Chronic Transplant Rejection:
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Effusion, Pleural:
Choices:
1. Tachycardia
2. Hypotension
3. Rashes
4. Respiratory depression
Answer: 1 - Tachycardia
Explanations:
Morphine causes histamine release and results in hypotension and
bradycardia.
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Research Concepts:
Morphine:
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Research Concepts:
Cutdown, Saphenous Vein:
Choices:
1. pH 7.35
2. PCO2 48
3. D(A-a)O2 < 350 torr on 100% O2
4. PaO2 >70 torr on FIO2 0.5
Answer: 2 - PCO2 48
Explanations:
PCO2 levels greater than 45 torr may indicate that the patient is still not
breathing well and is therefore not ready for extubation.
However, in a CO2 retainer, this level may be acceptable.
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Research Concepts:
Ventilator Management:
Choices:
1. Carvedilol
2. Captopril
3. Furosemide
4. Diltiazem
Answer: 4 - Diltiazem
Explanations:
Diltiazem is a calcium channel (L- type) blocker prototype
Like verapamil, diltiazem has more depressant effect on heart than
dihydropyridines (e.g., nifedipine)
Diltiazem can cause AV block, CHF, edema and constipation
Diltiazem is widely used to treat arrhythmias, hypertension and angina
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Research Concepts:
Heart Failure, Congestive:
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Research Concepts:
Cardiomyopathy, Dilated:
Choices:
1. Red rash
2. Erythema nodosum
3. Polycythemia
4. Neutropenia
Answer: 3 - Polycythemia
Explanations:
Erythrocytosis, or polycythemia, is an excess of red blood cells.
In primary polycythemia, there is no identifiable cause of red blood cell
increase, whereas in secondary polycythemia the hormone erythropoietin is
increased.
Other causes of polycythemia include smoking, high altitude living, chronic
carbon monoxide exposure, and disorders of the kidney.
Symptoms of polycythemia include purpura, bruising, tender skin rashes,
thrombosis of small vessels, heat intolerance, weight loss, itching, and
excess warmth in the body.
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Research Concepts:
Polycythemia:
Choices:
1. cAMP
2. ATP
3. cGMP
4. GTP
Answer: 3 - cGMP
Explanations:
Nitroglycerin activates guanylate cyclase and converts GTP to cGMP.
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Research Concepts:
Nitroglycerin:
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Research Concepts:
Intravenous Infusion:
Choices:
1. Prior intracranial hemorrhage (ICH)
2. Active bleeding
3. Known malignant intracranial neoplasm
4. All of the above
Answer: 4 - All of the above
Explanations:
Prior ICH, active bleeding or bleeding diathesis (excluding menses) and
known malignant intracranial neoplasm are absolute contraindications to
thrombolysis in STEMI
Some others are known structural cerebral vascular lesion and ischemic
stroke within 3 months
Lastly, others are suspected aortic dissection, and significant closed-head
trauma or facial trauma within 3 months
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Research Concepts:
Thrombolytic Therapy:
Choices:
1. Late afternoon
2. Early morning
3. At night
4. Evening
Answer: 1 - Late afternoon
Explanations:
Prinzmetal angina typically occurs in the early morning.
Many people who use nitrates develop tolerance and a drug free period
should be established.
The drug free period should not be in the morning as this is the time when
the attacks usually occur.
The patient should be advised to have a drug free period in the late
afternoon.
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Research Concepts:
Angina, Prinzmetal:
Choices:
1. Complete blood count (CBC)
2. Serum sodium
3. Serum creatinine
4. Serum cross-reactive protein
Answer: 1 - Complete blood count (CBC)
Explanations:
TPA is a thrombolytic agent, which can cause bleeding
It is contraindicated in patients with low platelet counts
A CBC should therefore be performed to assess the platelet count
It will also provide a baseline hemoglobin for comparison purposes if
bleeding occurs
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Research Concepts:
TPA Therapy:
Choices:
1. Adenoviridae
2. Hepadnaviridae
3. Picornaviridae
4. Reoviridae
Answer: 3 - Picornaviridae
Explanations:
Enteroviruses, members of Picornaviridae, account for at least half of all
cases of acute myocarditis
Of the individual members, group B coxsackie viruses are the most
common causes
Myocarditis due to group A coxsackie viruses, echoviruses, and
polioviruses is also well documented.
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Research Concepts:
Myocarditis, Viral:
Choices:
1. Patients positive for syphilis
2. Patients with Turner syndrome
3. Adults with Marfan syndrome
4. Patients with mitral valve stenosis
Answer: 4 - Patients with mitral valve stenosis
Explanations:
Patients with Turner syndrome, Marfan syndrome, previous syphilis
infection, and aortic stenosis are highly predisposed to aortic dissection
Blunt chest trauma can result in aortic dissection due to rapid deceleration
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Research Concepts:
Aortic Dissection:
Choices:
1. Majority occur in the right cardiophrenic angle
2. They communicate with the pericardium
3. Do not require excision
4. Can be aspirated
Answer: 2 - They communicate with the pericardium
Explanations:
Pericardial cysts do not communicate with the pericardium and are
asymptomatic.
They present as a unilocular mass and an occasional patient may present
with chest heaviness.
Diagnosis is usually evident on a chest x-ray and a CT scan. Majority are
located in the right cardiophrenic angle.
VATs is fast becoming an effective technique for removal of these cysts if
the diagnosis is not certain.
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Pericardial Cyst:
Choices:
1. Every 4 hours
2. Every 2 hours
3. Every 1 hour
4. Continuously
Answer: 4 - Continuously
Explanations:
Intravenous nitroglycerin can produce profound hypotension
The blood pressure should be monitored continuously in patients receiving
an intravenous nitroglycerin infusion.
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Research Concepts:
Nitroglycerin, Intravenous:
Explanations:
Heparin is a mucopolysaccharide, which is found in basophils and mast
cells.
Heparin acts like an anticoagulant and prevents formation of blood clots.
Unlike fibrinolytics, heparin does not break down clots that are already
formed.
Heparin is not used orally and its activity is monitored using activated
partial thromboplastin time (aPTT) levels.
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Research Concepts:
Heparin:
Choices:
1. Bleeding time
2. Prothrombin time
3. Euglobin time
4. International normalized ratio
Answer: 1 - Bleeding time
Explanations:
Bleeding time is affected by platelet function. Von Willebrand disease is a
common disorder that affects bleeding time.
Other disorders that cause prolonged bleeding time include
thrombocytopenia, disseminated intravascular coagulation, Bernard Soulier
syndrome, and Glanzmann thrombasthenia.
Aspirin and other non-steroidal anti-inflammatory drugs inhibit cyclo-
oxygenase and prolong bleeding time.
Individuals with Von Willebrand disease experience prolonged bleeding
time. Patients who are on aspirin or non-steroidal anti-inflammatory drugs
are usually told to stop the medication for at least 7-10 days prior to any
elective surgery.
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Research Concepts:
Bleeding Time:
Coagulopathy:
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Question 1903: Which of the following are common side effects high level
of statin drugs?
Choices:
1. Atrial fibrillation
2. Skin rash and gastrointestinal bleeding
3. Thrombocytopenia
4. Skeletal muscle injury and hepatic dysfunction
Answer: 4 - Skeletal muscle injury and hepatic dysfunction
Explanations:
Muscle injury and hepatic dysfunction are the most common
Muscle injury occurs because of inhibition of dolichol phosphate
Muscle injury can manifest with weakness and myalgias
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Statin Medication:
Myopathy:
Choices:
1. Right atrium
2. Right ventricle
3. Left atrium
4. Left ventricle
Answer: 3 - Left atrium
Explanations:
Mitral stenosis causes a higher pressure in the left atrium.
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Research Concepts:
Mitral Stenosis:
Choices:
1. Polycystic ovarian syndrome
2. Pregnancy
3. Premature menopause
4. Bulimia
Answer: 2 - Pregnancy
Explanations:
Secondary amenorrhea is often caused by pregnancy (most common cause)
Secondary amenorrhea is the absence of menses for 3 months in a woman
with previously normal menstruation or 9 months for women with a history
of oligomenorrhea.
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Amenorrhea, Secondary:
Pregnancy:
Choices:
1. Fibrin tissue adhesive
2. Skin staples
3. Porous strips
4. Healing by secondary intention
Answer: 4 - Healing by secondary intention
Explanations:
While each method has its purpose, they are not interchangeable, and
healing by secondary intention is limited to distinct situations
In general, healing by secondary intention is not an alternative to suture
techniques
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Research Concepts:
Wound Closure Technique:
Choices:
1. Cisatracurium
2. Succinylcholine
3. Atracurium
4. Vecuronium
Answer: 2 - Succinylcholine
Explanations:
Succinylcholine is the only depolarizing neuromuscular-blocking agent in
clinical use
It mimics acetylcholine by binding to the alpha subunits of nicotinic
receptors
The other choices are nondepolarizing neuromuscular blocking drugs
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Research Concepts:
Depolarizing Neuromuscular Blocking Drugs:
Choices:
1. ACE inhibitors increase the progression of disease
2. Ejection fraction is the best predictor for mortality rate
3. Beta blockers are beneficial
4. Five year mortality rate is 50 percent
Answer: 1 - ACE inhibitors increase the progression of disease
Explanations:
Studies have shown ACE inhibitors and beta blockers lower the progression
of disease and improve the overall function
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Research Concepts:
Heart Failure, Congestive:
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Pulmonary Embolism:
Choices:
1. Congenital prolonged QT syndrome
2. Wolff-Parkinson-White syndrome
3. Tetralogy of Fallot
4. Hypertrophic cardiomyopathy
Answer: 4 - Hypertrophic cardiomyopathy
Explanations:
Hypertrophic cardiomyopathy is the most common cause of ventricular
fibrillation in people younger than 30.
Hypertrophic cardiomyopathy is the most common cause of ventricular
fibrillation in athletes.
It has autosomal dominant inheritance.
The hypertrophy of the left ventricle, most commonly of the septum.
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Research Concepts:
Cardiomyopathy, Hypertrophic:
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Research Concepts:
Ventricular Fibrillation:
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Research Concepts:
Cardiac Tamponade:
Choices:
1. Diastolic time decreases more than systolic time decreases
2. Systolic time decreases more than diastolic time decreases
3. Diastolic time decreases but systolic time stays the same
4. Diastolic time stays the same but systolic time decreases
Answer: 1 - Diastolic time decreases more than systolic time decreases
Explanations:
Normally, the cardiac cycle is two thirds diastolic and one third systolic.
During tachycardia diastole is shortened preferentially.
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Research Concepts:
Tachycardia:
Cardiac Physiology:
Choices:
1. Amiodarone
2. Quinidine
3. Lidocaine
4. Cardioversion
Answer: 4 - Cardioversion
Explanations:
In any hypotensive patient with an arrhythmia, cardioversion should be the
first step.
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Research Concepts:
Atrial Fibrillation:
Choices:
1. Heberden nodes
2. Bouchard nodes
3. Osler nodes
4. Janeway lesions
Answer: 3 - Osler nodes
Explanations:
Osler nodes are reddish painful lesions on the palms and soles.
Osler nodes are usually associated with infective endocarditis.
Other features of endocarditis include Roth spots and Janeway lesions.
Janeway lesions also occur on the palms but are not painful.
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Research Concepts:
Endocarditis, Bacterial:
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Pulmonary Artery Catheterization:
Choices:
1. Pindolol
2. Propranolol
3. Labetalol
4. Acebutolol
Answer: 3 - Labetalol
Explanations:
Labetalol has both alpha and beta blocking ability. It has a short half-life.
It is sometimes used for hypertension in pregnancy although it is considered
to be a category C pregnancy drug.
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Research Concepts:
Labetalol:
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Research Concepts:
Blood Transfusion:
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Research Concepts:
Intracoronary Stents:
Choices:
1. Aspirin platelet function test
2. Prothrombin time
3. Reptilase time
4. Platelet count
Answer: 1 - Aspirin platelet function test
Explanations:
The aspirin platelet function test can be ordered for preoperative evaluation.
The test can also be used for evaluation of women with menorrhagia,
detecting drug-induced platelet dysfunction, and checking patient
compliance with antiplatelet drugs.
It may be appropriate to assist in evaluation of bleeding patients.
It may detect patients with von Willebrand disease and assist in their
treatment with DDAVP.
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Research Concepts:
Aspirin:
Choices:
1. It is used in the treatment of malaria
2. It normally causes a widened QRS
3. It rarely causes toxic side effects
4. It is a Class 1 anti-arrhythmic
Answer: 4 - It is a Class 1 anti-arrhythmic
Explanations:
Quinidine is a Class 1 anti-arrhythmic. It is indicated for atrial, interatrial,
and ventricular arrhythmias.
Quinine is used in the treatment of malaria, not quinidine. A wide QRS is
not normal and might indicate quinidine toxicity.
Quinidine has numerous side effects and serum levels should be monitored.
Patient Need: Physiological Integrity
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Research Concepts:
Antiarrhythmic Medication:
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Research Concepts:
Anticoagulation:
Choices:
1. Amiodarone
2. Quinidine
3. Lidocaine
4. Cardioversion
Answer: 4 - Cardioversion
Explanations:
In any hypotensive patient with an arrhythmia, cardioversion should be the
first step of treatment.
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Research Concepts:
Cardiogenic Shock:
Atrial Fibrillation:
Choices:
1. Lithotomy
2. Trendelenburg
3. Reverse Trendelenburg
4. High Fowler's
Answer: 4 - High Fowler's
Explanations:
High Fowler's position is best for a hospitalized patient experiencing
difficulty breathing
The patient's upper torso is positioned between 60 to 90o in relation to the
lower body
It is also useful for patient's who are on feeding precautions
It is also useful when needing dependent drainage after abdominal surgery
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Research Concepts:
Respiratory Distress/Failure:
Choices:
1. Place a central venous pressure line early for fluid resuscitation and
monitoring
2. Type and crossmatch
3. Secure the airway and ventilate adequately
4. Rapidly infuse colloids
Answer: 3 - Secure the airway and ventilate adequately
Explanations:
The airway must be established.
Identification and control of bleeding are done simultaneously with IV
access and fluid resuscitation.
Type specific or O-negative blood is given if hemodynamic instability
persists after the infusion of 2 L of crystalloid.
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Research Concepts:
Shock, Hemorrhagic:
Choices:
1. Unstable angina
2. Hypertension
3. Asthma
4. Chronic obstructive pulmonary disease
Answer: 1 - Unstable angina
Explanations:
Unstable angina is an absolute contraindication to cardiopulmonary
exercise testing
Other absolute contraindications include uncontrolled asthma, uncontrolled
hypertension, aortic stenosis, febrile illness, and O2 sat <85% at rest
Relative contraindications include hypertension, heart disease, epilepsy, and
inability to exercise
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Research Concepts:
Cardiopulmonary Exercise Testing:
Choices:
1. Prolonged prothrombin time (PT)
2. Prolonged partial thromboplastin time (PTT)
3. Prolonged thrombin time
4. Prolonged fibrin time
Answer: 2 - Prolonged partial thromboplastin time (PTT)
Explanations:
Factor VIII deficiency results in a prolonged PIT, with a normal PT and
thrombin time
Fibrin time is not a true test. Factor VIII is involved in the intrinsic
coagulation cascade, which is initiated by factor XII interaction with high
molecular weight kinins or kallikrein and resulting in serial activation of
factors XI and IX, with factor VIII acting as a cofactor with activated factor
IX for activation of factor X
The PTT measures the function of the intrinsic cascade, and is therefore
prolonged in cases of factor VIII or IX deficiency. The PT measures the
extrinsic clotting cascade, with factor VII interacting with tissue factor to
activate factor X
Activated factor X can then activate factor V, which then activates thrombin
(factor 11), which then cleaves fibrinogen to form fibrin. Factor XIII is then
required for fibrin cross-linking to form a stable blood clot
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Research Concepts:
Hemophilia A:
Choices:
1. Informed consent
2. Compensation
3. Refusal of treatment
4. Choose alternate treatments
Answer: 2 - Compensation
Explanations:
Human subjects participating in medical research must have informed
consent.
They can refuse treatment or choose alternate treatments.
Some research studies do offer compensation but this is not a legal
requirement.
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Research Concepts:
Ethics and Legal Issues:
Research Study:
Choices:
1. Hypoxemia
2. Bilateral infiltrates
3. Decreased lung compliance
4. Pulmonary capillary wedge pressure of 16 mm Hg
Answer: 4 - Pulmonary capillary wedge pressure of 16 mm Hg
Explanations:
Cardiogenic pulmonary edema will have PCWP greater than 18 mm Hg
Both conditions may have hypoxemia, bilateral infiltrates, and decreased
lung compliance
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Research Concepts:
Acute Respiratory Distress Syndrome:
Choices:
1. Holter monitor
2. Transthoracic echocardiogram
3. Exercise scintigraphy
4. CT scan
Answer: 3 - Exercise scintigraphy
Explanations:
If a patient has an inconclusive exercise stress test, one must rule out
coronary artery disease.
One can either proceed with a stress dobutamine echo or nuclear
scintigraphy.
A coronary angiogram can be performed if suspicion is high.
The use of CT scan to assess calcium deposition in the coronary vessels is
still being questioned. The results are hard to interpret.
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Treadmill Stress Testing:
Choices:
1. Double aortic knob sign
2. Tracheal displacement to the right
3. Displacement of nasogastric tube
4. Notching of the ribs
Answer: 4 - Notching of the ribs
Explanations:
The most common finding of aortic dissection on chest x-ray is mediastinal
widening.
Other features on chest x-ray include a double aortic knob sign, inward
displacement of aortic wall calcification, tracheal displacement, left side
pleural effusion, cardiac enlargement, and left apical opacity.
Notching of ribs is seen in coarctation of the aorta.
Occasionally, mediastinal fat may cause widening on chest x-ray and lead
to a false positive diagnosis. The best test for a stable patient with suspected
dissection is either a chest CT or a transesophageal echocardiogram.
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Aorta, Trauma:
Choices:
1. Right atrial enlargement
2. Right lung collapse
3. Left ventricular enlargement
4. Left atrial enlargement
Answer: 3 - Left ventricular enlargement
Explanations:
The apical impulse is normally at the left midclavicular line in the fifth
interspace.
Displacement laterally and inferiorly can occur with left ventricular
enlargement.
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Left Ventricular Enlargement:
Choices:
1. Thiosulfate
2. Depoprusside
3. Acetaldehyde
4. Cyanide
Answer: 4 - Cyanide
Explanations:
Nitroprusside is a drug that is used for malignant hypertension and in severe
congestive heart failure since it reduces both preload and after load.
Nitroprusside degrades in the human body to release cyanide.
Rhodanese is a mitochondrial enzyme that detoxifies the cyanide by
reaction with thiosulfate.
Without adequate thiosulfate the cyanide ions can rapidly reach toxic levels.
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Research Concepts:
Sodium Nitroprusside:
Choices:
1. Wheezing
2. Prolonging the action of local anesthetics
3. Hypotension
4. Pulmonary edema
Answer: 4 - Pulmonary edema
Explanations:
Epinephrine can induce pulmonary edema in some patients.
Pulmonary edema is best treated with diuretics.
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Research Concepts:
Epinephrine:
Choices:
1. Bicarbonate
2. Potassium
3. Calcium
4. Digoxin
Answer: 3 - Calcium
Explanations:
Chvostek sign occurs when tapping the skin over the facial nerve causes
ipsilateral contraction of facial muscles. This is a suggestive sign of
hypocalcemia.
Trousseau sign occurs when the blood pressure cuff is inflated on the arm
and causes a flexion of the wrist and extension of interphalangeal joints.
The thumb usually adducts. Trousseau sign is more specific for
hypocalcemia.
Other abnormalities that may occur in hypocalcemia include athetosis,
dystonic spasm, Parkinson disease, and hemiballismus.
Coarse hair, brittle nails, and dry skin are other features of long-standing
hypocalcemia.
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Research Concepts:
Hypocalcemia:
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Heart Failure, Congestive:
Choices:
1. Release of adrenaline
2. Relaxation of the bronchial tree
3. Release of ACTH
4. All of the above
Answer: 4 - All of the above
Explanations:
Components of a stress reaction include release of adrenalin and ACTH and
relaxation of the bronchial tree
Another component of the reaction is slowing of the digestive process
The stress reaction prepares the body to react efficiently to a stressor
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Research Concepts:
Stress Reaction:
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Preoperative Evaluation And Management:
Choices:
1. ASA
2. Plavix
3. Coumadin
4. Alteplase (tPA)
Answer: 4 - Alteplase (tPA)
Explanations:
Streptokinase is often used to break down clots in patients with an acute
myocardial infarction, but allergic reactions limit use.
The major application of thrombolytic agents is in the emergency treatment
of myocardial infarction. Under ideal conditions (within 6 hours following
an MI), these agents will lyse the thrombus in the coronary artery and
reanalyze the vessel.
Primary percutaneous coronary intervention is the preferred procedure. If
this procedure is not possible, fibrinolysis is the best option.
Streptokinase induces activation of plasminogen to produce plasmin, which
breaks up blood clots.
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Research Concepts:
Myocardial Infarction, Acute:
Choices:
1. Thrombus
2. Emboli
3. Hypotension
4. Spinal ischemia
Answer: 4 - Spinal ischemia
Explanations:
A common complication of aortic surgery is low flood in the radicular
arteries and leads to spinal cord ischemia.
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Paraplegia:
Choices:
1. Mismatch on an isotopic ventilation/perfusion scan
2. Pleuritic chest pain
3. Peripheral cyanosis
4. Tachypnea
Answer: 3 - Peripheral cyanosis
Explanations:
Peripheral cyanosis is not a feature of a pulmonary embolism.
Most common presenting features of a pulmonary embolism include
dyspnea, chest pain, cough, hemoptysis, and fever.
Depending on the size of the pulmonary embolus, the symptoms may vary.
Friction rub, loud P2, or a right ventricular gallop are heard in only a few
patients.
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Research Concepts:
Pulmonary Embolism:
Choices:
1. Tachycardia
2. Peripheral edema
3. Jugular venous distention (JVD)
4. Carotid bruits
Answer: 4 - Carotid bruits
Explanations:
Tachycardia, peripheral edema and JVD are classic signs and symptoms of
right ventricular heart failure
Carotid bruits are not signs of right ventricular failure
Carotid bruits are associated with atherosclerotic carotid artery disease
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Research Concepts:
Right Heart Failure:
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Pneumonia, Aspiration:
Choices:
1. Anterior wall infarction
2. Septal wall infarction
3. Inferior wall infarction
4. Normal
Answer: 2 - Septal wall infarction
Explanations:
Holosystolic murmur is likely a VSD
Echo is needed to further evaluate the condition
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Interventricular Septum Damage:
Choices:
1. Young patients
2. Female patients
3. Diabetics
4. Use of vein grafts
Answer: 4 - Use of vein grafts
Explanations:
Patients requiring REDO surgery today are much older, increasing number
have diabetes, and diffuse peripheral vascular disease.
REDO surgery is undertaken for graft closure, worsening atherosclerosis,
choice of conduit, kinking, etc
The number one factor which determines if a REDO is going to occur is the
choice of conduit.
Late vein graft atherosclerosis is seen on angiography on practically all vein
grafts after 3-5 years.
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Redo CABG:
Choices:
1. 2 years
2. 4 years
3. 5 years
4. 10 years
Answer: 3 - 5 years
Explanations:
PTCA is more cost effective for the first 5 years in multi-vessel disease
After 5 years, CABG becomes more cost effective due to rehospitalization
and revascularization
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Research Concepts:
Percutaneous Transluminal Coronary Angioplasty:
Choices:
1. To prevent blood clots
2. To prevent muscle atrophy
3. To promote cardiac contractility
4. To increase blood flow to the legs
Answer: 1 - To prevent blood clots
Explanations:
Plantar and dorsal flexion of the ankles promotes venous return from the
lower extremities.
Venous stasis is a risk factor for deep venous thrombosis (DVT)
development.
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Research Concepts:
Deep Venous Thrombosis Prophylaxis:
Choices:
1. Total lung capacity
2. Vital capacity
3. Residual volume
4. Functional residual capacity
Answer: 2 - Vital capacity
Explanations:
In obstructive lung disease all parameters increases except vital capacity
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Research Concepts:
Obstructive Pulmonary Disease, Chronic (COPD):
Vital Capacity:
Choices:
1. Barbiturates
2. Muscle relaxants
3. Dantrolene
4. Acetaminophen
Answer: 3 - Dantrolene
Explanations:
Dantrolene and observation for the next 24 hours are recommended. The
condition can recur.
The patient has malignant hyperthermia.
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Malignant Hyperthermia:
Choices:
1. It is a pure opioid antagonist at the mu, kappa and delta receptors
2. It has an addiction potential equal to that of codeine
3. At high doses it causes death by respiratory depression
4. It is classified as a mixed agonist -antagonist drug
Answer: 3 - At high doses it causes death by respiratory depression
Explanations:
Morphine is the prototype of many narcotic drugs that interact
predominantly with the opioid mu-receptor
These mu-binding sites are discretely distributed in the human brain, spinal
cord and spinal nucleus of trigeminal nerve.
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Morphine:
Choices:
1. Resistance
2. Voltage
3. Frequency
4. Amplitude
Answer: 3 - Frequency
Explanations:
Electrocautery current frequency is 105 Hz.
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Electrocautery:
Choices:
1. Constipation from immobility
2. Activity intolerance from left ventricular dysfunction
3. Hypoxia from restricted lung function
4. Cholestasis from diffuse edema
Answer: 2 - Activity intolerance from left ventricular dysfunction
Explanations:
Decreased cardiac output associated with heart failure leads to reduced
oxygen and fatigue
These patients have minimal exercise tolerance
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Research Concepts:
Heart Failure:
Choices:
1. Gallstones
2. Renal stones
3. Thrombotic stroke
4. Peripheral vascular disease
Answer: 4 - Peripheral vascular disease
Explanations:
There are many complications that can occur in patients with Eisenmenger
syndrome.
CNS complications include brain abscess, thrombotic strokes, and
hemorrhage.
Both gallstones and renal stones occur with increased frequency in this
condition.
Transient visual loss is a common complaint. Peripheral vascular disease is
not likely.
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Research Concepts:
Eisenmenger Syndrome:
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Research Concepts:
Transplantation:
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Antihypertensive Medications:
Choices:
1. Causes smooth muscle to relax
2. Most well known is nitrous oxide
3. Prostacyclin is considered to an EDRF
4. Endothelial derived hyperpolarizing factor is thought to be potassium
Answer: 2 - Most well known is nitrous oxide
Explanations:
EDRF are factors produced by the endothelium that cause relaxation of
smooth muscle.
The most well known EDRF is nitric oxide, which induces vasodilatation.
Other EDRF include Prostacyclin and it is felt that another endothelium
derived hyperpolarizing factor may be potassium.
Heme proteins can also induce formation of heat shock proteins that
generate carbon monoxide and relax smooth muscle.
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Research Concepts:
Endothelial-derived Relaxation Factor:
Choices:
1. Hyperchloremia
2. Hypernatremia
3. Hypokalemia
4. Hyperkalemia
Answer: 3 - Hypokalemia
Explanations:
Low potassium levels predispose to digoxin toxicity
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Research Concepts:
Digoxin Toxicity:
Choices:
1. There is a decrease in lung over-inflation
2. It is used to assist spontaneous breathing
3. It is more effective in patients with decreased lung compliance
4. None of the above
Answer: 1 - There is a decrease in lung over-inflation
Explanations:
Over-inflation and concomitant lung injury is prevented with PCV by
delivering pressure cycled mechanical breaths
PCV is not suitable in case of intrinsic pulmonary dysfunction because it
delivers variable inflation volumes depending on lung compliance
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Research Concepts:
Mechanical Ventilation:
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Research Concepts:
Bundle of His:
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Aspirin:
Choices:
1. Have a judge order treatment
2. Discuss implications with the family
3. Review the case with the ethics committee
4. Respect the patients wishes
Answer: 4 - Respect the patients wishes
Explanations:
The competent patient has the right to refuse treatment.
Discussing with the family and ethics committee cannot overrule the
patient.
Patient confidentiality would prevent discussion with family without the
patient's permission.
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Refusal of Care:
Choices:
1. Diuretics
2. Calcium channel blockers
3. ACE inhibitors
4. Beta-blockers
Answer: 3 - ACE inhibitors
Explanations:
Side effects of ACE inhibitors include dry cough, rashes, fever, altered
taste, hypotension, and hyperkalemia.
Potassium levels must be monitored and potassium supplementations are
contraindicated in patients who take ACE inhibitors.
Angioedema is a rare but potentially life threatening reaction.
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Research Concepts:
Angiotensin Converting Enzyme Inhibitors (ACEI):
Choices:
1. Hypernatremia
2. Hyponatremia
3. Hyperkalemia
4. Hypokalemia
Answer: 4 - Hypokalemia
Explanations:
Insulin infusion commonly results in intracellular shift of potassium
Insulin infusion is often used to reduce hyperkalemia
Sodium bicarbonate can also cause hypokalemia by inducing intracellular
shift of potassium
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Research Concepts:
Hypokalemia:
Insulin:
Choices:
1. Lidocaine
2. Bupivacaine
3. Mepivacaine
4. Tetracaine
Answer: 4 - Tetracaine
Explanations:
Amide local anesthetics are hydrolyzed in the liver. Liver dysfunction may
increase the elimination half-life of amide local anesthetics.
Lidocaine, bupivacaine, and mepivacaine are amides and need to be used
with caution in those with hepatic disease.
Patients with severe liver disease may develop toxic levels.
Tetracaine is an ester and is safer in these patients.
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Research Concepts:
Local Anesthetics:
Choices:
1. 3 cc per hour
2. 6 cc per hour
3. 30 cc per hour
4. 60 cc per hour
Answer: 3 - 30 cc per hour
Explanations:
30 cc per hour will be delivered. 60 min/1 hr X 2mg/1 min X 1q/1000mg X
500cc/2 gm = 30 cc per hour.
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Research Concepts:
Antiarrhythmic Medication:
Ventricular Tachycardia:
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Research Concepts:
Pericardial Effusion:
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Patient Self-Determination Act:
Advanced Directives:
Choices:
1. First degree heart block
2. Wenckebach (Mobitz type I)
3. Classical (Mobitz type II)
4. Sinus bradycardia
Answer: 3 - Classical (Mobitz type II)
Explanations:
Mobitz type II can have serious complications.
Placing a pacemaker prior to surgery may be required.
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Research Concepts:
Heart Block, Second Degree:
Choices:
1. Best treatment is percutaneous intervention
2. These patients do better with open-heart surgery
3. The patients do best with medical therapy
4. There is no difference in prognosis if the medical therapy is optimal
Answer: 4 - There is no difference in prognosis if the medical therapy is
optimal
Explanations:
In patients with stable angina, if optimal medical therapy is provided there
is no difference in outcome compared to percutaneous intervention or
surgery.
Evidence now shows that elderly patients with stable CAD do better with
medical therapy.
Percutaneous intervention may help in the short term, but stent occlusion is
a chronic problem.
Open-heart surgery is best reserved for patients with depressed LV function
and triple vessel disease.
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Research Concepts:
Coronary Artery Disease:
Choices:
1. Atrial septal defect
2. Atrial embolism
3. Coronary atherosclerosis
4. Underlying malignancy
Answer: 1 - Atrial septal defect
Explanations:
Atrial septal defect is a congenital heart defect in the interatrial septum.
It allows blood flow between the atria.
It can result in paradoxical emboli, a clot traveling from the right atrium to
the left and into systemic circulation. This can cause a cerebrovascular
accident.
Other complications of ASD are pulmonary hypertension, Eisenmenger
syndrome, atrial flutter, atrial fibrillation, and right sided heart failure.
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Research Concepts:
Atrial Septal Defect:
Stroke, Ischemic:
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Research Concepts:
Digoxin:
Choices:
1. 25%
2. 50%
3. 75%
4. nearly 100%
Answer: 3 - 75%
Explanations:
Unless they undergo valve replacement therapy, the three-year mortality
rate after symptoms develop is 75%.
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Research Concepts:
Aortic Stenosis:
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Research Concepts:
Lung Exam:
Choices:
1. Aspirin
2. Nifedipine
3. Atorvastatin
4. Metoprolol
Answer: 2 - Nifedipine
Explanations:
Calcium channel blockers have not been shown to reduce risk in patients
with coronary disease
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Research Concepts:
Coronary Artery Disease:
Choices:
1. Start an amiodarone drip
2. Urgent cesarean section
3. Change to metoprolol for rate control
4. Percutaneous mitral balloon valvulotomy
Answer: 4 - Percutaneous mitral balloon valvulotomy
Explanations:
If a patient with severe mitral stenosis with a valve area of less than 1.0 cm
is experiencing symptomatic decompensation with maximal medical
therapy, invasive therapy is indicated
The risks of procedural radiation to the developing fetus are outweighed at
this stage by the risks of extreme prematurity from an early delivery
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Research Concepts:
Mitral Stenosis:
Pregnancy:
Choices:
1. Sister Mary Joseph phenomenon
2. Chadwick sign
3. Koebner sign
4. Nikolsky sign
Answer: 3 - Koebner sign
Explanations:
Koebner sign refers to development of new lesions at sites of injury. Any
type of trauma can lead to new psoriatic skin lesions.
In general, causes of Koebner reaction are due to scratching rather than the
actual infection or chemical injury.
Other disorders besides psoriasis that exhibit Koebner reaction are
molluscum contagiosum, warts, and toxidodendron dermatitis.
For this reason, all psoriatic patients should be aware that any skin damage
could lead to new lesions.
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Research Concepts:
Psoriasis:
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Research Concepts:
Urine Output:
Choices:
1. Aspirin
2. Aspirin and dipyridamole
3. Warfarin
4. Nothing
Answer: 3 - Warfarin
Explanations:
Patients with chronic non-valvular atrial fibrillation have a 5 fold increased
risk for stroke
Unless contraindicated, warfarin has been the drug of choice for stroke
prevention in moderate to high risk patients
Dabigatran and rivaroxaban are indicated for prevention of stroke in these
patients
They have the advantage of not needing protime monitoring but have not
shown superiority in stroke prevention
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Research Concepts:
Atrial Fibrillation:
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Research Concepts:
Hypoxia:
Choices:
1. Minidose heparin
2. Graded stockings
3. Dextran
4. Acetylsalicylic acid
Answer: 4 - Acetylsalicylic acid
Explanations:
Mechanical compression with compression stockings is widely used but the
latest evidence indicates that it must be combined with a pharmacological
method to prevent deep vein thrombosis.
Aspirin alone is not recommended and it does not help prevent deep vein
thrombosis. Compared to low molecular weight heparin, aspirin fared
worse than a placebo.
Both heparin and low molecular weight heparin can be used as prophylaxis
against deep vein thrombosis. Low molecular weight heparin has a long
half-life and less tendency to cause heparin-induced thrombocytopenia.
Low molecular weight heparin does not need any monitoring and is cost
effective.
Graded intermittent pneumatic stockings are also widely used and effective
in preventing deep vein thrombosis.
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Research Concepts:
Deep Venous Thrombosis Prophylaxis:
Choices:
1. Administer 100% oxygen
2. Lower perfusion pressure
3. De air coronaries by antegrade perfusion
4. Administer steroids and phenytoin
Answer: 3 - De air coronaries by antegrade perfusion
Explanations:
After a massive air embolus, it is the CNS effects, which will predominate.
The air from the coronaries will slowly leak out and into the aortic vent but
the air in the CNS is hard to get out.
Hyperbaric oxygen has been tried out in selected cases
Retrograde perfusion via the coronary sinus may assist in removing air
from the coronary
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Research Concepts:
CPB, Air Embolism:
Choices:
1. Pulmonary vascular congestion
2. Atrial fibrillation
3. Decreased left atrial pressure
4. Jugular venous distention\
Answer: 3 - Decreased left atrial pressure
Explanations:
There is increased left atrial pressure with severe mitral stenosis
Elevated left atrial pressure causes the mitral valve to open quickly
This results in a short interval between A2 and the opening snap
Severe mitral stenosis can result in elevated jugular pressure, atrial
fibrillation, and pulmonary vascular congestion
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Research Concepts:
Mitral Stenosis:
Choices:
1. Provide oxygen and furosemide
2. Do nothing
3. Endotracheal intubation
4. Call the patient's family to get permission to treat
Answer: 1 - Provide oxygen and furosemide
Explanations:
A DNR order does not mean to withhold treatment
Oxygen and furosemide would be appropriate for this patient suffering from
acute pulmonary edema. If there is not an intravenous line, oral morphine
would be an option.
Endotracheal intubation would be too aggressive with a DNR order
Calling a patient's family to inform them of treatment is not required with a
DNR order
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Research Concepts:
Respiratory Distress/Failure:
Choices:
1. Metronidazole
2. Vancomycin
3. Minocycline
4. Ceftriaxone
Answer: 1 - Metronidazole
Explanations:
Both metronidazole and vancomycin are effective against Clostridium
difficile
Metronidazole is much less expensive
Vancomycin can select for vancomycin resistant enterococci
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Research Concepts:
Pseudomembranous Colitis:
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Research Concepts:
Digoxin:
Choices:
1. Transesophageal echocardiogram
2. Elevated erythrocyte sedimentation rate
3. Positive blood culture
4. Leukocytosis with left shift
Answer: 3 - Positive blood culture
Explanations:
The most specific test or SBE is a positive blood culture
Vegetations seen on echocardiogram are often positive with this condition
but the absence does not rule it out
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Research Concepts:
Endocarditis, Bacterial:
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Metoprolol:
Choices:
1. Decreasing production of catecholamines
2. Dilating coronary arteries
3. Decreasing oxygen requirements
4. Increases peripheral resistance
Answer: 3 - Decreasing oxygen requirements
Explanations:
Propranolol is a non-selective beta-blocker with little or no intrinsic
sympathetic activity.
Propranolol helps decrease angina by blocking catecholamines and
reducing the work of the heart.
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Research Concepts:
Beta-Blockers:
Choices:
1. Ventricular septal defect
2. Bicuspid aortic valve
3. Patent ductus arteriosus
4. Atrial septal defect
Answer: 4 - Atrial septal defect
Explanations:
Coarctation of the aorta accounts for 5-8% of congenital heart defects.
It is most commonly associated with bicuspid aortic valve, ventricular
septal defect, and patent ductus arteriosus.
Coarctation of the aorta often presents with upper extremity hypertension
and radial-femoral pulse delay.
The disorder can be surgically treated but endovascular techniques are also
being applied.
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Research Concepts:
Aortic Coarctation:
Choices:
1. Racemic epinephrine
2. Albuterol
3. Ipratropium
4. Steroid
Answer: 1 - Racemic epinephrine
Explanations:
Racemic epinephrine has alpha receptor activity
Can result in vasoconstriction and decrease glottic swelling
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Research Concepts:
Extubation:
Glottic Edema:
Choices:
1. Charaterized by asymmetric hypertrophy
2. It is an autosomal recessive disorder
3. Histology reveals disarray of myocardium fibers
4. Calcium channel blockers are first line pharmacologic agents
Answer: 2 - It is an autosomal recessive disorder
Explanations:
Hypertrophic cardiomyopathy is an autosomal dominant disorder
characterized by asymmetric septal hypertrophy and myocardial fiber
disarray
Beta blockers and calcium channel blockers are usually the first line agents
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Research Concepts:
Hypertrophic Obstructive Cardiomyopathy:
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Research Concepts:
Protamine:
Choices:
1. Adenosine
2. Digoxin
3. Amiodarone
4. Propranolol
Answer: 3 - Amiodarone
Explanations:
Amiodarone is used for pharmacologic cardioversion in hemodynamically
stable patients
Lidocaine is used to terminate ventricular tachycardias and prevent
ventricular fibrillation after cardioversion
Paroxysmal supraventricular tachycardias are best treated with adenosine
Propranolol is a beta blockers used to reduce AV nodal conductivity
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Research Concepts:
Amiodarone:
Choices:
1. Monocytes
2. Polymorphonuclear cells
3. Hydroxyproline
4. Fibrin
Answer: 3 - Hydroxyproline
Explanations:
Collagen synthesis would be evidenced by presence of hydroxyproline
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Research Concepts:
Wound Healing:
Choices:
1. Just distal to the left subclavian artery
2. Within a few centimeters of the proximal ascending aorta
3. At the proximal arch
4. Distal to the descending aorta
Answer: 2 - Within a few centimeters of the proximal ascending aorta
Explanations:
Type I dissection involves the entire aorta. Type ll involves only the
ascending aorta and type lll involves the descending aorta.
Cystic medial degeneration plays a role in the pathology of aneurysmal
formation and dissection in the ascending aorta.
Other factors related to dissection in the ascending aorta are hypertension,
cannulation during cardiopulmonary bypass, Marfan, pregnancy, retrograde
dissection, and a bicuspid aortic valve.
The majority of dissections (95%) occur in 2 places. The most common is
several centimeters about the atrioventricular valve and the second most
common is just beyond the ligamentum arteriosum in the descending aorta.
The tear is usually transverse and can progress in either a retrograde or an
antegrade fashion.
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Research Concepts:
Dissection, Aortic:
Choices:
1. Nitroprusside
2. Eplerenone
3. Losartan
4. Isosorbide dinitrate
Answer: 2 - Eplerenone
Explanations:
Eplerenone is an aldosterone antagonist used in the treatment of CHF
Nitroprusside is a vasodilator used in the treatment of CHF
Losartan is an angiotensin receptor blocker used in the treatment of CHF
Isosorbide dinitrate is a nitrate used in the treatment of CHF
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Research Concepts:
Potassium Sparing Diuretics:
Choices:
1. Troponin
2. CPK
3. LDH
4. AST
Answer: 2 - CPK
Explanations:
CPK levels usually start to rise within 4 hours after an acute MI
The levels of CPK peak at about 24-36 hours and the en subside over the
next 3-4 days
Occasionally small infarcts can be missed by CPK and thus troponin levels
should be measured in patients with suspected MI but have negative serial
CPK
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Research Concepts:
Myocardial Infarction, Acute:
Choices:
1. Intravenous NSAIDs
2. Intravenous digoxin
3. Catheter closure
4. Surgical ligation
Answer: 2 - Intravenous digoxin
Explanations:
Option include intravenous ibuprofen or indomethacin, surgical ligation,
catheter closure, and waiting for spontaneous closure
Surgical ligation requires a thoracotomy
Spontaneous closure of PDA is common
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Research Concepts:
Patent Ductus Arteriosus:
Choices:
1. Respiration
2. Skin
3. Urine
4. Soft tissue exposure
Answer: 3 - Urine
Explanations:
Temperature must be monitored for the entire duration of the case.
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Research Concepts:
Hypothermia:
General Anesthesia:
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Research Concepts:
Endocarditis, Bacterial:
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