Exam 21: Muscle Blood Flow and Cardiac Output During Exercise; the Coronary Circulation and Ischemic Heart Disease

A healthy 40-year-old man has been exercising maximally for 15 minutes. Which of the following conditions is likely to be present?

At the onset of exercise, the mass sympathetic nervous system strongly discharges. Which of the following would you expect to occur?

Which of the following will elevate the plateau of the cardiac output curve?

A 60-year-old man experienced an ischemia-induced myocardial infarction and died from ventricular fibrillation. What factor was most likely to increase the tendency of the heart to fibrillate after the infarction?

Which of the following increases the risk of adverse cardiac events?

Which of the following is normally associated with an increased tendency for the heart to fibrillate following a myocardial infarction?

The majority of venous blood flow leaves the heart muscle through which of the following?

Which is usually the most important controller of coronary blood flow?

Which of the following normally causes vasodilation of skeletal muscle arterioles during exercise?

During mild exertion a 70-year-old man has an ischemia-induced myocardial infarction and dies from ventricular fibrillation. In this patient, which factor was most likely to increase the tendency of the heart to fibrillate after the infarction?

Which of the following vascular beds experiences the most vasoconstriction in a person near the end of a 5-mile run?

A 60-year-old man has been told by his doctor that he has angina caused by myocardial ischemia. Which of the following treatments would be beneficial for him?