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Correspondence
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Volume 334:1476-1477 May 30, 1996 Number 22
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Cardiac Pacing

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To the Editor: According to the World Health Organization and the American College of Cardiology, type II second-degree atrioventricular block is defined as a single nonconducted P wave associated with constant PR intervals before and after the blocked impulse, provided there are at least two consecutive conducted P waves to indicate the behavior of the PR intervals,1 and the sinus rate remains constant.2

In their review of cardiac pacing, Kusumoto and Goldschlager (Jan. 11 issue)3 perpetuate some errors in the 1991 American College of Cardiology–American Heart Association guidelines for pacemaker implantation.4 Their definition of type II block, as in the . . . [Full Text of this Article]

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