A nursing student asks a nurse how beta blockers increase the oxygen supply to the heart in the treatment of anginal pain. The nurse tells the student that beta blockers:

Question

Quizplus · Accepted Answer

Beta blockers increase the time the heart is in diastole, which increases the time during which blood flows through the myocardial vessels, allowing more oxygen to reach the heart. Beta blockers do not dilate arterioles. They do not increase cardiac contractility; they decrease it, which reduces the cardiac oxygen demand. They do not increase arterial pressure, which would increase the cardiac oxygen demand.

A Nursing Student Asks a Nurse How Beta Blockers Increase