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The basic pathophysiology of myocardial infarction is best described as:

A) cardiac output that is insufficient to meet the needs of the heart and body.
B) temporary vasospasm that occurs in a coronary artery.
C) total obstruction of a coronary artery, which causes myocardial necrosis.
D) irregular heart rate and force, reducing blood supply to coronary arteries.

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Answer: Option C - total obstruction of a coronary artery, which causes myocardial necrosis.

Explanation:

MYOCARDIAL INFARCTION is the necrosis (death of tissues) of heart muscle caused by an interruption to the supply of blood to the heart, often as a result of coronary thrombosis (blockage caused by blood clot).

So, the basic pathophysiology of myocardial infarction is TOTAL OBSTRUCTION of the coronary artery by blood clot, resulting in myocardial necrosis

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