Retrograde block during dual pathway atrioventricular nodal reentrant paroxysmal tachycardia

Robert A. Bauernfeind*, Delon Wu, Pablo Denes, Kenneth M. Rosen

*Corresponding author for this work

Research output: Contribution to journalArticle

59 Scopus citations

Abstract

There are limited reported data regarding the occurrence of retrograde block during dual pathway atrioventricular (A-V) nodal reentrant paroxysmal tachycardia. This study describes two patients with this phenomenon. The first patient had 2:1 and type 1 retrograde ventriculoatrial block during the common variety of A-V nodal reentrance (slow pathway for anterograde and fast pathway for retrograde conduction). Fractionated atrial electrograms suggested that the site of block was within the atria. The second patient had type 1 retrograde block (between the A-V node and the low septal right atrium) during the unusual variety of A-V nodal reentrance (stow pathway for retrograde and fast pathway for anterograde conduction). The abolition of retrograde block by atropine suggested that the site of block was within A-V nodal tissue. Both cases demonstrate that intact retrograde conduction is not necessary for the continuation of A-V nodal reentrant paroxysymal tachycardia. Case 2 supports the hypothesis that the atria are not a requisite part of the A-V nodal reentrant pathway.

Original languageEnglish (US)
Pages (from-to)499-505
Number of pages7
JournalThe American journal of cardiology
Volume42
Issue number3
DOIs
StatePublished - Sep 1978

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine

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