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Second-degree AV Block Type I

Second-degree AV Block,Type I, With 2:1 Conduction

Fri, 04/04/2014 - 23:17 -- Dawn

This ECG is a follow-up to last week's ECG of the WEEK, which presented an AVB that was mostly conducted 2:1, and proved to be a "Type II" block when it conducted 3:2 with consistent PR intervals at the end.  We often just use the term, "2:1 AVB", rather than try to discern the Mobitz type, realizing that the most important feature of a 2:1 block may be that it automatically cuts the heartrate in half.

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