Thursday, March 5, 2015

(D) atrioventricular (AV) node dysfunction

A 63-year-old woman with hypertension is started on a beta-blocker.

Which of the following conditions require caution in prescribing  this medication?

(A) migraine headaches
(B) hypertrophic subaortic stenosis
(C) Marfan syndrome
(D) atrioventricular (AV) node dysfunction
(E) intermittent claudication

(D) Beta-blockers are frequently used in the treatment of hypertrophic cardiomyopathy and
for migraine prophylaxis and might prevent aortic dilatation in Marfan syndrome. It rarely
causes clinical problems in patients with claudication, but if AV conduction defects are present
(either by disease or use of other drugs), life-threatening bradyarrhythmias can occur.


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