Which of the following is TRUE about a myocardial infarction?
a. It is caused by an obstruction in coronary artery.
b. The obstruction is caused only by a thrombus.
c. The area most commonly affected is the left ventricle.
d. The client's prognosis is better if small coronary artery is obstructed.
e. Typical symptoms of men are different than those of women.
f. It results in necrosis of tissues supplied by the artery.
A, C, D, E, F
A myocardial infarction is caused by an obstruction in a coronary artery, resulting in necrosis (death) to the tissues supplied by the artery. The obstruction is usually caused by atherosclerotic plaque, a thrombus, or an embolism. The area most commonly affected is the left ventricle. Obstruction of a large coronary artery damages the myocardial tissue and affects the pumping efficiency of the heart. A client's prognosis is better if a small coronary artery or arteriole is obstructed and there is good collateral circulation to the heart. If a large vessel is obstructed and the client does not have sufficient collateral circulation, the client may die immediately.
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