When discussing angina pectoris secondary to atherosclerotic disease with a patient, the patient asks why he tends to experience chest pain when he exerts himself. The nurse should describe which of the following phenomena?
A) Exercise increases the heart's oxygen demands.
B) Exercise causes vasoconstriction of the coronary arteries.
C) Exercise shunts blood flow from the heart to the mesenteric area.
D) Exercise increases the metabolism of cardiac medications.
Ans: A
Feedback:
Physical exertion increases the myocardial oxygen demand. If the patient has arteriosclerosis of the coronary arteries, then blood supply is diminished to the myocardium. Exercise does not cause vasoconstriction or interfere with drug metabolism. Exercise does not shunt blood flow away from the heart.
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