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Article
November 25, 1988

Paroxysmal Atrial Fibrillation in a Physically Active Man

Author Affiliations

Brown University The Miriam Hospital Providence, RI

Brown University The Miriam Hospital Providence, RI

JAMA. 1988;260(20):3006. doi:10.1001/jama.1988.03410200049019
Abstract

To the Editor.—  Dr Dunn1 raised the possibility of atrioventricular nodal dysfunction in a 63-year-old wind-surfer whose ventricular response to atrial fibrillation was only 80 beats per minute. An additional explanation for the slow ventricular response is enhanced vagal tone, a common physiological effect of exercise training. Our clinical experience suggests that a slow ventricular response to atrial fibrillation is the rule rather than the exception in such endurance-trained patients.

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