Third degree AV block classification

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Soroush Seifirad, M.D.[2] Cafer Zorkun, M.D., Ph.D. [3] Qasim Khurshid, M.B.B.S [4]

Overview

Classification

Atrioventricular block can be classified as follows:

First-degree atrioventricular block Second-degree atrioventricular block Third-degree atrioventricular block
P waves associated with 1:1 atrioventricular conduction and a PR interval >200 ms, P waves with a constant rate (<100 bpm), atrioventricular conduction is present but not 1:1 The width of this column is 400px
atrioventricular delay, no P waves are blocked Mobitz type I: P waves with a constant rate (<100 bpm) with a periodic single nonconducted P wave associated with P waves before and after the nonconducted P wave with inconstant PR intervals The width of this column is 400px

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