First degree atrioventricular block.

Abstract

First degree A-V block, defined as prolongation of the PR interval on the surface electrocardiogram, is a not uncommon finding on electrocardiographic screening of asymptomatic young individuals. Prevalences of from 0.65% to 1.1% have been reported. In the majority of cases the PR prolongation may be rendered normal by autonomic intervention. Long-term… (More)

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