A Nursing Student Asks a Nurse How Beta Blockers Increase

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:

A) dilate arterioles to improve myocardial circulation.
B) improve cardiac contractility, which makes the heart more efficient.
C) increase arterial pressure to improve cardiac afterload.
D) increase the time the heart is in diastole.

Correct Answer:

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