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SSM Heart - Aina Aqilah

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SSM Assignment

Coronary artery insufficiency caused by atherosclerosis is the most common cause of ischemic

heart disease. A myocardial infarction (MI) is a necrotic area of the myocardium. MI refers to an

area of the heart that has become infected, damaged, or partially collapsed as a result of stress

or infection.

Coronary atherosclerosis

The atherosclerotic process, characterized by lipid deposits in the intima (lining layer) of the

coronary arteries, begins during early adulthood and slowly results in stenosis of the lumina of

the arteries.

Insufficiency of blood supply to the heart (myocardial ischemia) may result in MI. As coronary

atherosclerosis progresses, the collateral channels connecting one coronary artery with the

other expand. Despite this compensatory mechanism, the myocardium may not receive enough

oxygen when the heart needs to perform increased amounts of work.

Also, when arteries become clogged, fatty material, cholesterol, cellular waste, and other

substances can accumulate in the endothelial cell lining of the artery, resulting in plaque

formation and blockages that deprive the heart of oxygen and cause a heart attack.

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