A patient with coronary artery disease (CAD) experiences an increase in heart rate during physical therapy at the bedside. The nurse recognizes that an increase in heart rate in a patient with CAD may result in:
A) Increased myocardial perfusion
B) Myocardial ischemia
C) Formation of a pulmonary emboli
D) Electrolyte imbalances
Ans: B
Feedback: Unlike other arteries, the coronary arteries are perfused during diastole. An increase in heart rate shortens diastole and can decrease myocardial perfusion. Patients, particularly those with CAD, can develop myocardial ischemia.
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