Lecture Notes on Cardiovascular System

Prepared By: Mark Fredderick R Abejo R.N, MAN

MEDICAL AND SURGICAL NURSING

Cardiovascular System

Lecturer: Mark Fredderick R. Abejo RN, MAN

Anatomy and Physiology of the Heart

Cardiovascular system consists of the heart, arteries,  Pericardium – invaginated sac

veins & capillaries. The major function are circulation of blood,  Visceral – attached to the exterior of
delivery of O2 & other nutrients to the tissues of the body & myocardium
removal of CO2 & other cellular products metabolism  Parietal – attached to the great vessels and
diaphragm
Heart
 Papillary Muscle
 Muscular pumping organ that propel blood into the arerial Arise from the endocardial & myocardial surface of the
system & receive blood from the venous system of the body. ventricles & attach to the chordae tendinae
 Hollow muscular behind the sternum and between the lungs
 Located on the middle of mediastinum  Chordae Tendinae
 Resemble like a close fist Attach to the tricuspid & mitral valves & prevent eversion
 Weighs approximately 300 – 400 grams during systole
 Has heart wall has 3 layers
 Endocardium – lines the inner chambers of the  Separated into 2 pumps:
heart, valves, chordate tendinae and papillary  right heart – pumps blood through the lungs
muscles.  left heart – pumps blood through the peripheral
 Myocardium – muscular layer, middle layer, organs
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responsible for the major pumping action of the
ventricles.  0 Chamber of the Heart
 Epicardium – thin covering(mesothelium), Atria
covers the outer surface of the heart  2 chambers, function as receiving chambers, lies
above the ventricles

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Lecture Notes on Cardiovascular System
Prepared By: Mark Fredderick R Abejo R.N, MAN

 Upper Chamber (connecting or receiving)  Coronary Veins

 Right Atrium: receives systemic venous blood Coronary sinus – main vein of the heart
through the superior vena cava, inferior vena cava & Great Cardiac vein – main tributary of the coronary sinus
coronary sinus Oblique vein – remnant of SVC, small unsignificant
 Left Atrium: receives oxygenated blood returning to
the heart from the lungs trough the pulmonary veins
Heart Circulation

Ventricles
 2 thick-walled chambers; major responsibility for
forcing blood out of the heart; lie below the atria
 Lower Chamber (contracting or pumping)
 Right Ventricle: contracts & propels deoxygenated
blood into pulmonary circulation via the aorta
during ventricular systole; Right atrium has
decreased pressure which is 60 – 80 mmHg
 Left Ventricle: propels blood into the systemic
circulation via aortaduring ventricular systole; Left
ventricle has increased pressure which is 120 – 180
mmHg in order to propel blood to the systemic
circulation

 Heart Valves
 Tricuspid
 Pulmonic
 Mitral
 Aortic

Cardiac Conduction System

Properties of Heart Conduction System

• Automaticity
• Excitability
 Coronary artery – 1st branch of aorta • Conductivity
Right Coronary • Contractility
 SA nodal Branch – supplies SA node
 Right marginal Branch – supplies the right border
of the heart Structure of Heart Conduction System
 AV nodal branch – supplies the AV node
 Posterior interventricular artery – supplies both
ventricles
Left Coronary
 Circumflex branch – supplies SA node in 40 % of
people
 Left marginal – supplies the left ventricle
 Anterior interventricular branch aka Left anterior
descending(LAD)–supplies both ventricles and
interventricular septum
 Lateral branch – terminates in ant surface of the
heart

 Nodal tissues
SA Node( Sino-atrial, Keith and Flack)
 Primary Pacemaker
 Between SVC and RA
 Vagal and symphatetic innervation
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Lecture Notes on Cardiovascular System
Prepared By: Mark Fredderick R Abejo R.N, MAN

AV Node( Atrioventricular , Kent and Tawara) The Normal Cardiac Cycle

 At the right atrium
 3 zones General Concepts
 AN Zone(atrionodal) Systole - period of chamber contraction
 N Zone (nodal) Diastole - period of chamber relaxation
 NH zone (nodal –HIS) Cardiac cycle - all events of systole and diastole during one
heart flow cycle

 Internodal and Interatrial Pathways

Connects SA and AV Node
Ant. Internodal(bachman) tract
Middle Internodal(wenkebach) tract Events of Cardiac Cycle
Posterior internodal(Thorel) tract 1. mid-to-late ventricular diastole: ventricles filled
 Bundle of His/ Purkinje Fibers  the AV valves are open
Provides for ventricular conduction system  pressure: LOW in chambers; HIGH in
Fastest conduction among cardiac tissues aorta/pulmonary trunk
Right bundle  aortic/pulmonary semilunar valves CLOSED
Left Bundle  blood flows from vena cavas/pulmonary vein INTO
atria
Cardiac Action Potential  blood flows through AV valves INTO ventricles
(70%)
 Depolarization: electrical activation of a cell caused by
the influx of sodium into the cell while potassium exits 2. ventricular systole: blood ejected from heart
the cell  filled ventricles begin to contract, AV valves
CLOSE
 Repolarization: return of the cell to the resting state  contraction of closed ventricles increases pressure
caused by re-entry of potassium into the cell while  ventricular ejection phase - blood forced out
sodium exits  semilunar valves open, blood -> aorta & pulmonary
trunk
 Refractory periods:
Effective refractory period: phase in which cells 3. isovolumetric relaxation: early ventricular diastole
are incapable of depolarizing
Relative refractory period: phase in which cells  ventricles relax, ventricular pressure becomes LOW
require a stronger-than-normal stimulus to  semilunar valves close, aorta & pulmonary trunk
depolarize backflow

TOTAL CARDIAC CYCLE TIME = 0.8 second

Anatomical Sequence of Excitation of the Heart (normal 70 beats/minute)
 (right atrium)
 sinoatrial node (SA) atrial systole (contraction) = 0.1 second
 (right AV valve) ventricular systole (contraction) = 0.3 second
 atrioventricular node (AV) quiescent period (relaxation) = 0.4 second
 atrioventricular bundle (bundle of His)
 right & left bundle of His branches
 Purkinje fibers of ventricular walls Cardiac Output - Blood Pumping of the Heart

(from SA through complete heart contraction = 220 ms = 0.22 s) General Concepts

• Stroke volume: the amount of blood ejected with each
a. Sinoatrial node (SA node) "the pacemaker" - has the heartbeat
fastest autorhythmic rate (70-80 per minute), and sets the • Cardiac output: amount of blood pumped by the
pace for the entire heart; this rhythm is called the sinus ventricle in liters per minute
rhythm; located in right atrial wall, just inferior to the • Preload: degree of stretch of the cardiac muscle fibers at
superior vena cava the end of diastole
• Contractility: ability of the cardiac muscle to shorten in
b. Atrioventricular node (AV node) - impulses pass from response to an electrical impulse
SA via gap junctions in about 40 ms.; impulses are • Afterload: the resistance to ejection of blood from the
delayed about 100 ms to allow completion of the ventricle
contraction of both atria; located just above tricuspid • Ejection fraction: the percent of end-diastolic volume
valve (between right atrium & ventricle) ejected with each heartbeat

c. Atrioventricular bundle (bundle of His) - in the

interATRIAL septum (connects L and R atria)

d. L and R bundle of His branches - within the

interVENTRICULAR septum (between L and R
ventricles)

e. Purkinje fibers - within the lateral walls of both the L and

R ventricles; since left ventricle much larger, Purkinjes
more elaborate here; Purkinje fibers innervate <papillary
muscles= before ventricle walls so AV can valves prevent
backflow
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Lecture Notes on Cardiovascular System
Prepared By: Mark Fredderick R Abejo R.N, MAN

General Variables of Cardiac Output hypernatremia - HIGH Na+ concentration; can

block Na+ transport & muscle contraction
1. Cardiac Output (CO) - blood amount pumped per minute
 CO (ml/min) = HR (beats/min) X SV (ml/beat) 3. Other Factors Effecting Heart Rate (HR)
 Normal CO = 75 beats/min X 70 ml/beat
= 5.25 L/min normal heart rate - fetus 140 - 160 beats/minute
female 72 - 80 beats/minute
2. Heart Rate (HR) - cardiac cycles per minute male 64 - 72 beats/minute
 Normal range is 60-100 beats per minute
 Tachycardia is greater than 100 bpm 1. exercise - lowers resting heart rate (40-60)
 Bradycardia is less than 60 bpm 2. heat - increases heart rate significantly
 Sympathetic system INCREASES HR 3. cold - decreases heart rate significantly
 Parasympathetic system (Vagus) DECREASES HR 4. tachycardia - HIGHER than normal resting heart rate
(over 100); may lead to fibrillation
3. Blood pressure - Cardiac output X peripheral resistance 5. bradycardia - LOWER than normal resting heart rate
 Control is neural (central and peripheral) and (below 60); parasympathetic drug side effects; physical
hormonal conditioning; sign of pathology in non-healthy patient
 Baroreceptors in the carotid and aorta
 Hormones- ADH, aldosterone, epinephrine can
increase BP; ANF can decrease BP Vascular System
Regulation of Stroke Volume (SV) Major function of the blood vessels isto supply the tissue
with blood, remove wastes, & carry unoxygenated blood
 End diastolic volume (EDV) - total blood collected in
ventricle at end of diastole; determined by length of back to the heart
diastole and venous pressure (~ 120 ml)
 End systolic volume (ESV) - blood left over in ventricle
at end of contraction (not pumped out); determined by Types of Blood Vessels
force of ventricle contraction and arterial blood pressure
(~50 ml)
Arteries
SV (ml/beat) = EDV (ml/beat) - ESV (ml/beat)
Normal SV = 120 ml/beat - 50 ml/beat = 70 ml/beat Elastic-walled vessels that can stretch during systole &
recoil during diastole; they carry blood away from the

Frank-Starling Law of the Heart - critical factor for stroke heart & distribute oxygenated blood throughout the body
volume is "degree of stretch of cardiac muscle cells"; Arterioles
more stretch = more contraction force
Small arteries that distribute blood to the capillaries &
increased EDV = more contraction force function in controlling systemic vascular resistance &
slow heart rate = more time to fill
exercise = more venous blood return therefore arterial pressure
Capilliaries

Regulation of Heart Rate (Autonomic, Chemical, Other) The following exchanges occurs in the capilliaries
O2 & CO2
1. Autonomic Regulation of Heart Rate (HR)
Solutes between the blood & tissue
 Sympathetic - NOREPINEPHRINE (NE) increases heart Fluid volume transfer between the plasma &
rate (maintains stroke volume which leads to increased
Cardiac Output) interstitial space
Venules
 Parasympathetic - ACETYLCHOLINE (ACh) decreases
heart rate Small veins that receive blood from capillaries &
function as collecting channels between the capillaries &
 Vagal tone - parasympathetic inhibition of inherent rate
of SA node, allowing normal HR veins
Veins
 Baroreceptors, pressoreceptors - monitor changes in
blood pressure and allow reflex activity with the Low-pressure vessels with thin small & less muscles than
autonomic nervous system
arteries; most contains valves that prevent retrograde
blood flow; they carry deoxygenated blood back to the
2. Hormonal and Chemical Regulation of Heart Rate (HR)
heart. When the skeletal surrounding veins contract, the
 epinephrine - hormone released by adrenal medulla veins are compressed, promoting movement of blood
during stress; increases heart rate
back to the heart.
 thyroxine - hormone released by thyroid; increases heart
rate in large quantities; amplifies effect of epinephrine

 Ca++, K+, and Na+ levels very important;

hyperkalemia - increased K+ level; KCl used to

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stop heart on lethal injection
hypokalemia - lower K+ levels; leads to
abnormal heart rate rhythms
hypocalcemia - depresses heart function
hypercalcemia - increases contraction phase
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Lecture Notes on Cardiovascular System
Prepared By: Mark Fredderick R Abejo R.N, MAN

Palpation:

Assessment of the Client with Cardiovascular

Disorders

Nursing History
Risk Factors

A. Non – Modifiable Risk Factor

 Age
 Gender
 Race
 Heredity Heart Sounds: Stethoscope Listening

B. Modifiable Risk Factor Overview of Heart Sounds (lub-du ; lub, dub )

 Stress
 Diet lub - closure of AV valves, onset of ventricular systole
 Exercise dub - closure of semilunar valves, onset of diastole
 Sedentary lifestyle
 Cigarette smoking  Tricuspid valve (lub) - RT 5th intercostal, medial
 Alcohol  Mitral valve (lub) - LT 5th intercostal, lateral
 Hypertension  Aortic semilunar valve (dub) - RT 2nd intercostal
 Hyperlipidemia  Pulmonary semilunar valve (dub) - LT 2nd intercostals
 DM
 Obesity S1 - due to closure of the AV(mitral/tricuspid) valves
 Type A personality - timing: beginning of systole
 Contraceptive Pills - loudest at the apex

Common Clinical Manifestations of Cardiovascular Disorders S2 - due to the closure of the semi-lunar (pulmonic/aortic) valves
- timing: diastole
a. Dyspnea - loudest at the base
- Exertional
- Orthopnea
- Paroxysmal Noctural Dyspnea
- Cheyne-stokes
b. Chest Pain
c. Edema
- Ascites
- Hydrothorax
- Anasarca
d. Palpitation S3 – Ventricular Diastolic Gallop
e. Hemoptysis Mechanism: vibration resulting from resistance to rapid
f. Fatigue ventricular filling secondary to poor compliance
g. Syncope and Fainting Timing: early diastole
h. Cyanosis Location: Apex (LV) or LLSB (RV)
i. Abdominal Pain Pitch: faint and low pitched
j. Clubbing of fingers
k. Jaundice S4 - Atrial Diastolic Gallop
Mechanism: vibration resulting from resistance to late
Physical Assessment ventricular filling during atrial systole
Timing: late diastole ( before S1)
Inspection: Location: Apex ( LV) or LLSB (RV)
– Skin color Pitch: low ( use bell)
– Neck vein distention

Heart Murmurs
Murmur - sounds other than the typical "lub-dub"; typically caused
by disruptions in flow

 Incompetent valve - swishing sound just AFTER the

normal "lub" or "dub"; valve does not completely close,
some regurgitation of blood

 Stenotic valve - high pitched swishing sound when blood

should be flowing through valve; narrowing of outlet in
the open state
– Respirations

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– Pulsations Pericardial Friction Rub
– Clubbing
– Capillary refill  It is an extra heart sound originating from the pericardial sac
 Mechanism: Originates from the pericardial sac as it moves
 Timing: with each heartbeat
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Lecture Notes on Cardiovascular System
Prepared By: Mark Fredderick R Abejo R.N, MAN

 Location: over pericardium. Upright position, leaning 2. Coagulation Screening Test

forward
 Pitch: high pitched and scratchy. Sounds like sandpaper a. Bleeding Time – measures the ability to stop bleeding after
being rubbed together small puncture wound
 Significance: inflammation, infection, infiltration
b. Partial Thromboplastin Time (PTT) – used to identify
deficiencies of coagulation factors, prothrombin and fibrinogen;
Classification of Clients with Diseases of the monitors heparin therapy.
Heart ( Functional Capacity )
c. Prothrombin Time (Pro-time) – determines activity and
 Class I. Patients with cardiac disease but without interaction of the Prothrombin group: factors V (preacclerin), VII
resulting limitations of physical activity. (proconvertin), X (Stuart-Power factor), prothrombin and
 Class II. Patients with cardiac disease resulting to slight fibrinogen; used to determine dosages of oral anti-coagulant.
limitation of physical activity
 Class III. Patients with cardiac disease resulting in Normal Values
marked limitation of physical activity. They are
comfortable at rest. Bleeding Time: 2.75-8 min
 Class IV. Patients with cardiac disease resulting in Partial Thromboplastin Time (PTT): 60 - 70 sec.
inability to carry on any physical activity without Prothrombin Time (PT): 12-14 sec.
discomfort

Diagnostic Assessment 3. Erythrocyte sedimentation rate ( ESR)

It is a measurement of the rate at which RBC’s settle out
Purposes: of anticoagulated blood in an hour
It is elevated in infectious heart disorder or myocardial
1. To assist in diagnosing MI infarction
2. To identify abnormalities
3. To assess inflammation Normal Values
4. To determine baseline value Male: 15-20 mm/hr
5. To monitor serum level of medications Female: 20-30 mm/hr
6. To assess the effects of medications
4. CARDIAC Proteins and enzymes
A. Blood Studies
a. CK- MB ( creatine kinase)
1. Complete Blood Count  Most cardiac specific enzymes
 Accurate indicator of myocardial dammage
a. RBC count- # of RBCs/ mm3 of blood, to diagnose anemia and  Elevates in MI within 4 hours, peaks in 18 hours and
ploycythemia then declines till 3 days
 Normal value is 0-7 U/L or males 50-325 mu/ml
b. Hemoglobin- # of grams of hgb/ 100ml of blood; to measure the Female 50-250 mu/ml
oxygen-carrying capacity of the blood
b. Lactic Dehydrogenase (LDH)
c. Hematocrit – expressed in %; measures the volume of RBCs in  Most sensitive indicator of myocardial damage
proportion to plasma; used also to diagnose anemia and  Elevates in MI in 24 hours, peaks in 48-72 hours
polycythemia and abnormal hydration states Return to normal in 10-14 days
 Normally LDH1 is greater than LDH2
d. RBC indices- measure RBC size and hemoglobin content  Lactic Dehydrogenase (LDH)
a. MCV (mean corpuscular volume)  MI- LDH2 greater than LDH1 (flipped LDH pattern)
b. MCH (mean corpuscular hemoglobin)  Normal value is 70-200 IU/L (100 – 225 mu/ml)
c. MCHC (mean corpuscular hemoglobin concentrarion)
c. Myoglobin
e. Platelet count- # of Platelet/ mm3; to diagnose  Rises within 1-3 hours
thrombocytopenia and subsequent bleeding tendencies  Peaks in 4-12 hours
 Returns to normal in a day
f. WBC count- of WBCs/ mm3 of blood; to detect infection or  Not used alone
inflammation  Muscular and RENAL disease can have elevated
myoglobin
g. WBC Differential count- determines proportion of each WBC
in a sample of 100 WBCs; used to classify leukemias d. Troponin I and T
 Troponin I is usually utilized for MI
Normal Values  Elevates within 3-4 hours, peaks in 4-24 hours and
persists for 7 days to 3 weeks!
RBC: Women – 4.2-5.4 million/mm3  Normal value for Troponin I is less than 0.6 ng/mL
Men – 4.7-6.1 million/mm3  REMEMBER to AVOID IM injections before
Hgb: Women – 12-16 g/dl obtaining blood sample!
Men – 13-18 g/dl  Early and late diagnosis can be made!
Hct : Women – 36-42%
Men – 42-48% e. SERUM LIPIDS
WBC: 5000-10,000/mm3  Lipid profile measures the serum cholesterol,
Granulocytes triglycerides and lipoprotein levels
Neutrophils: 55-70%  Cholesterol= 200 mg/dL
Eosinophils: 1-4%  Triglycerides- 40- 150 mg/dL
Basophils: 0.5-1.0%  LDH- 130 mg/dL

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Agranulocytes  HDL- 30-70- mg/dL
Lymphocytes: 20-40%  NPO post midnight (usually 12 hours)
Monocytes: 2-8%
Platelets: 150,000-450,000/mm3
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Lecture Notes on Cardiovascular System
Prepared By: Mark Fredderick R Abejo R.N, MAN

B. Non-Invasive Procedure

1. Cardiac Monitoring / Electrocardiography (ECG)

A non-invasive procedure that evaluates the electrical
activity of the heart

a. Limb Leads

b. Precordial Leads

Deflection Waves of ECG

1. P wave - initial wave, demonstrates the depolarization from SA

Node through both ATRIA; the ATRIA contract about 0.1 s after
start of P Wave.

2. QRS complex - next series of deflections, demonstrates the

depolarization of AV node through both ventricles; the ventricles
contract throughout the period of the QRS complex, with a short
delay after the end of atrial contraction; repolarization of atria also
obscured

The precordial leads VI –V6 are part of the 12 lead EKG. 3. T Wave - repolarization of the ventricles (0.16 s)
They are not monitored with the standard limb leads
4. PR (PQ) Interval - time period from beginning of atrial
contraction to beginning of ventricular contraction (0.16 s)
c. 12 lead ECG
5. QT Interval - the time of ventricular contraction (about 0.36 s);
from beginning of ventricular depolarization to end of
repolarization.

2. Holter Monitoring
 A non-invasive test in which the client wears a Holter
monitor and an ECG tracing recorded continuously over
a period of 24 hours
 Instruct the client to resume normal activities and
maintain a diary of activities and any symptoms that may
develop

ECG Paper

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Lecture Notes on Cardiovascular System
Prepared By: Mark Fredderick R Abejo R.N, MAN

3. Stress Test
 A non-invasive test that studies the heart during C. Invasive Procedure
activity and detects and evaluates CAD
 Exercise test, pharmacologic test and emotional test 1. Cardiac Catheterization ( Coronary Angiography /
 Treadmill testing is the most commonly used stress Arteriography )
test  Insertion of a catheter into the heart and surrounding
 Used to determine CAD, Chest pain causes, drug vessels
effects and dysrhythmias in exercise  Is an invasive procedure during which physician
 Pre-test: consent may be required, adequate rest , eat injects dye into coronary arteries and immediately
a light meal or fast for 4 hours and avoid smoking, takes a series of x-ray films to assess the structures
alcohol and caffeine of the arteries
 During the test: secure electrodes to appropriate  Determines the structure and performance of the
location on chest, obtain baseline BP and ECG heart valves and surrounding vessels
tracing, instruct client to exercise as instructed and  Used to diagnose CAD, assess coronary atery
report any pain, weakness and SOB, monitor BP and patency and determine extent of atherosclerosis
ECG continuously, record at frequent interval  Pretest: Ensure Consent, assess for allergy to
 Post-test: instruct client to notify the physician if seafood and iodine, NPO, document weight and
any chest pain, dizziness or shortness of breath . height, baseline VS, blood tests and document the
Instruct client to avoid taking a hot shower for 10-12 peripheral pulses
hours after the test  Pretest: Fasting for 8-12 hours, teachings,
medications to allay anxiety
 Intra-test: inform patient of a fluttery feeling as the
4. Pharmacological stress test catheter passes through the heart; inform the patient
 Use of dipyridamole that a feeling of warmth and metallic taste may
 Maximally dilates coronary artery occur when dye is administered
 Side-effect: flushing of face  Post-test: Monitor VS and cardiac rhythm
 Pre-test: 4 hours fasting, avoid alcohol, caffeine  Monitor peripheral pulses, color and warmth and
 Post test: report symptoms of chest pain sensation of the extremity distal to insertion site
 Maintain sandbag to the insertion site if required to
maintain pressure
 Monitor for bleeding and hematoma formation
5. ECHOCARDIOGRAM

 Non-invasive test that studies the structural and

functional changes of the heart with the use of ultrasound
 Client Preparation: instruct client to remain still during
the test, secure electrodes for simultaneous ECG tracing, 2. Nuclear Cardiology
explain that there will be no pain or electrical shock,  Are safe methods of evaluating left ventricular muscle
lubricant placed on the skin will be cool. function and coronary artery blood distribution.
 Client Preparation: obtain written consent, explain
procedure, instruct client that fasting may be required for
6. Phonocardiography a short period before the exam, assess for iodine allergy.
 Is a graphic recording of heart sound with simultaneous  Post Procedure: encourage client to drink fluids to
ECG. facilitate the excretion of contrast material, assess
venipuncture site for bleeding or hematoma.
 Types of Nuclear Cardiology
o Multigated acquisition (MUGA) or cardiac
blood pool scan
 Provides information on wall motion
during systole and diastole, cardiac
valves, and EF.
o Single-photon emission computed
tomography (SPECT)
 Used to evaluate the myocardium at
risk of infarction and to determine
infarction size.
o Positron emission tomography (PET)
scanning
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viable and nonviable myocardial
tissue.
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Lecture Notes on Cardiovascular System
Prepared By: Mark Fredderick R Abejo R.N, MAN

o Perfusion imaging with exercise testing

 Determines whether the coronary  Client Preparation: obtain consent, insertion is under
blood flow changes with increased strict sterile technique, usually at the bedside, explain to
activity. client the sterile drapes may cover the face, assists to
 Used to diagnose CAD, determine position client flat or slight T-postion as tolerated and
the prognosis in already diagnosed instruct to remain still during the procedure
CAD, assess the physiologic  Nursing Care During Insertion: Monitor and document
significance of a known coronary HR,BP and ECG during the procedure
lesion, and assess the effectiveness of
various therapeutic modalities such
as coronary artery bypass surgery,
percutaneous coronary intervention, CARDIAC DISORDER
or thrombolytic therapy.

D. Hemodynamics Monitoring CORONARY ARTERIAL DISEASE

ISCHEMIC HEART DISEASE
1. CVP ( Central Venous Pressure )
 Reflects the pressure of the blood in the right atrium.
 Engorgement is estimated by the venous column that can Results from the focal narrowing of the large and
be observed as it rises from an imagined angle at th point medium-sized coronary arteries due to deposition of atheromatous
of manubrium ( angle of Louis). plaque in the vessel wall
 With normal physiologic condition, the jugular venous
column rises no higher than 2-3 cm above the clavicle
Stages of Development of Coronary Artery Disease
with the client in a sitting position at 45 degree angle.
1. Myocardial Injury: Atherosclerosis
2. Myocardial Ischemia: Angina Pectoris
3. Myocardial Necrosis: Myocardial Infarction

 CVP is a measurement of:

- cardiac efficiency I. ATHEROSCLEROSIS
- blood volume
- peripheral resistance ATHEROSCLEROSIS ARTERIOSCLEROSIS
 Right ventricular pressure – a catheter is passed from a
cutdown in the antecubital, subclavian jugular or basilica Narrowing of artery Hardening of artery
vein to the right atrium and attached to a prescribed Lipid or fat deposits Calcium and protein
manometer or tranducer. deposits
Tunica intima
 NORMAL CVP is 2 -8 cm h20 or 2-6 mm Hg Tunica media
 Decrease indicates dec. circulating volume, increase
indicates inc. blood volume or right heart beat failure.
 To Measure: patient should be flat with zero point of A. PRESDISPOSING FACTORS
1. Sex: male
manometer at the same level of the RA which
2. Race: black
corresponds to the mid-axillary line of the patient or
3. Smoking
approx. 5 cm below the sternum.
4. Obesity
 Fluctuations follow patients respiratory function and will
5. Hyperlipidemia
fall on inspiration and rise on expiration due to changes
6. Sedentary lifestyle
in intrapulmonary pressure. Reading should be obtained
7. Diabetes Mellitus
at the highest point of fluctuation.
8. Hypothyroidism
9. Diet: increased saturated fats
10. Type A personality
2. Pulmonary Artery Pressure ( PAP) Monitoring
 Appropriate for critically ill clients requiring more
B. SIGNS AND SYMPTOMS
accurate assessments of the left heart pressure
1. Chest pain
 Swan-Ganz Catheter / Pulmonary Artery Catheter is use
2. Dyspnea
3. Tachycardia
4. Palpitations
5. Diaphoresis

C. TREATMENT

Percutaneous Transluminal Coronary Angioplasty and

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Intravascular Stenting
 Mechanical dilation of the coronary vessel wall by
compresing the atheromatous plaque.
 It is recommended for clients with single-vessel
coronary artery disease.
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