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Ischemic Cardiac Conditions Cardiac Muscle Dysfunction: Dr. Afaq Ahmad PT Cardiopulmonary Physical Therapy

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Ischemic Cardiac Conditions

Cardiac Muscle Dysfunction


Dr. Afaq Ahmad; PT
Cardiopulmonary Physical Therapy
Coronary Arteries
Heart Valves
Conducting System
Myocardium
Coronary Heart Disease
Coronary heart disease is caused by narrowing of
the blood vessels to the heart. This reduces the
flow of blood to the heart.

If one of the blood vessels becomes completely


blocked, the blood supply to part of the heart
stops and is damaged. This is called a heart
attack.

If the blood supply to a large part of the heart is


stopped it may cause death.
Etiology
• Coronary heart disease is usually caused by a
condition called Atherosclerosis , which occurs
when fatty material and a substance called
plaque build up on the walls of your arteries.
This causes them to get narrow. As the coronary
arteries narrow, blood flow to the heart can slow
down or stop. This can cause chest pain,
shortness of breath, heart attack, and other
symptoms.
• Coronary heart disease (CHD) is the leading
cause of death
Risk factors for CHD
Other risk factors for CHD include having:
• A family history of CHD
• High blood cholesterol level
• High blood pressure
• High intake of saturated fats
• Diabetes
Myocardial Ischemia
• Results when there is an imbalance
between myocardial oxygen supply and
demand
= Leads to
• Myocardial hypoxia + accumulation of
waste metabolites due to atherosclerotic
disease of coronary arteries
Manifestation of Myocardial Ischemia:

 It is the major symptom of myocardial


ischemia.
 Angina pectoris most commonly
presents as pain, pressure or a burning
sensation in the area of the sternum
There are four types of Angina

1) Stable
2) Unstable
3) Prinzmetal’s
4) Myocardial Infarction 
1. Stable angina:
 Pain is precipitated by increased workload on the heart. May be caused by exercise, emotions, stress
and cold exposure.
 Symptoms may remain “stable” for a number of years or progress in severity.

2. Unstable angina
 Angina that occurs at rest.
 Also referred to as “pre-infarct” angina since it is usually associated with extensive blockage of coronary
arteries. Coronary blood flow does not meet the needs of the heart even at rest.
 Requires intensive treatment and evaluation.

3. Variant angina (vasospastic angina, Prinzmetal’s angina)


 Caused by vasospasm of the coronary arteries.
 Usually associated with coronary artery disease but may result from excess sympathetic activity.
 Frequently occurs at night, at rest or during minimal exercise.
 May be precipitated by stress, cold exposure or smoking.

4. Myocardial Infarction
 Region of myocardial necrosis due to prolonged cessation of blood supply
 Results from acute thrombus at side of coronary atherosclerotic stenosis
 May be first clinical manifestation of ischemic heart disease or history of Angina Pectoris
Congenital Heart Disease
An anatomic defect in the heart that develop in utero
during the first trimester and in present at birth
There are two types:
1- Cyanotic heart defect:
Obstruction of blood flow to the lung or mixing of
desaturated blue venous blood to saturated red
arterial blood within the chambers of the heart.
2- Acyanotic heart defect:
Blood is shunted from the left side of the heart to the
right side of the heart due to a structural defect (hole)
in the Interventricular septum
Myocardial Diseases
• Myocarditis
Acute or chronic inflammatory conditions of the
muscular walls of the heart resulting from
bacterial or viral infection more often.
• Cardiomyopathies:
• Group of disease of myocardium associated with
mechanical or electrical dysfunction that usually
exhibit inappropriate ventricular hypertrophy or
dilation.
Congestive Heart Failure

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