Electrophysiologic and pathologic correlations in two cases of chronic second degree atrioventricular block with left bundle branch block.

Abstract

This study concerns two cases of chronic 2 degrees atrioventricular (A-V) block with left bundle branch block (LBBB). Pathological studies included serial section of the conduction systems. Case 1 had type I 2 degrees block with LBBB. Electrophysiological studies revealed type I 2 degrees block proximal to the His bundle recording site and a prolonged H-V… (More)

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