What is the pathophysiology of a myocardial infarct?
A) A portion of the myocardium necroses and scars over.
B) The coronary vessels are narrowed during the attack.
C) The ischemic myocardium causes pain during the attack but is able to regenerate.
D) There is damage to the myocardium but no serious alteration of cardiac output.

Question

Quizplus · Accepted Answer

A myocardial infarct occurs when there is a blockage in the coronary arteries, leading to a lack of oxygen supply to the heart muscle. This results in ischemia and eventually necrosis of the affected myocardial tissue. The necrotic tissue is replaced by non-functional scar tissue, which can lead to decreased cardiac function and possible heart failure. Narrowing of the coronary arteries can contribute to the formation of blood clots, which may further block blood flow to the heart and worsen the infarct. Pain is a common symptom of myocardial infarction and is caused by the ischemic myocardium. While some regeneration of myocardial tissue may occur, it is not sufficient to overcome the damage inflicted by the infarct. The damage to the myocardium can lead to serious alterations in cardiac output and increase the risk of complications such as arrhythmias and heart failure.

What Is the Pathophysiology of a Myocardial Infarct