Stable patterns of AH block arising from longitudinal dissociation and reentry within the superfused rabbit AV junction.

Journal of Interventional Cardiac Electrophysiology : an International Journal of Arrhythmias and Pacing
E PattersonR Lazzara

Abstract

Multiple forms of antegrade AH Wenckebach block (WB) observed in 14 of 221 superfused rabbit AV junctions. Bipolar and microelectrode recordings were used to examine the mechanism of multiple forms of AH WB. Each of the 14 preparations demonstrated typical 3:2 and 2:1 AV block, but also demonstrated longitudinal dissociation within the slow pathway input (N = 11) or compact AV node (N = 3). A 3:2 WB in one pathway and 1:1 conduction in a parallel pathway summated to provide antegrade conduction of the third atrial beat. Retrograde conduction (reentry) blocked conduction of the fourth impulse (4:3 block). A 5:4 block was similarly observed, with summation providing for antegrade AH activation of the third and fourth atrial beats. Retrograde activation observed with the fourth beat, terminated antegrade conduction of the fifth beat. The studies demonstrate multiple AH WB patterns consistent with rate-dependent longitudinal dissociation, summation of dissociated AV conduction pathways, and retrograde conduction block within the AV junction.

References

Feb 1, 1978·The American Journal of Cardiology·M B SimsonE N Moore
Jan 1, 1975·Journal of Electrocardiology·H S FriedmanJ I Haft
Apr 1, 1989·British Heart Journal·F L Meijler, C Fisch
Mar 1, 1972·Circulation Research·A N DamatoG A Bobb
Jul 1, 1968·Circulation Research·J MeridethG K Moe
Jan 1, 1969·Circulation·B J ScherlagA N Damato
Apr 1, 1967·Cardiovascular Research·Y Watanabe, L S Dreifus
May 15, 1998·Journal of Cardiovascular Electrophysiology·M AntzR Lazzara
Jan 10, 2002·Journal of Electrocardiology·E Patterson, B J Scherlag
Oct 17, 2002·Journal of Cardiovascular Electrophysiology·Eugene Patterson, Benjamin J Scherlag
Oct 25, 2002·Journal of Interventional Cardiac Electrophysiology : an International Journal of Arrhythmias and Pacing·Eugene Patterson, Benjamin J Scherlag
Mar 12, 2004·Journal of Interventional Cardiac Electrophysiology : an International Journal of Arrhythmias and Pacing·Eugene Patterson, Benjamin J Scherlag
Sep 1, 2005·Journal of Interventional Cardiac Electrophysiology : an International Journal of Arrhythmias and Pacing·Eugene Patterson, Benjamin J Scherlag
Mar 1, 2008·Circulation Research·Jue LiMark R Boyett

❮ Previous
Next ❯

Citations

Dec 3, 2014·Revista Española De Cardiología·Miguel E Jauregui-AbularachJordi Bruguera-Cortada

❮ Previous
Next ❯

Related Concepts

Related Feeds

Cardiac Conduction System

The cardiac conduction system is a specialized tract of myocardial cells responsible for maintaining normal cardiac rhythm. Discover the latest research on the cardiac conduction system here.

Related Papers

Journal of Cardiovascular Electrophysiology
Youhua Zhang, T N Mazgalev
The Anatomical Record : Advances in Integrative Anatomy and Evolutionary Biology
William J HuckerIgor R Efimov
Circulation Research
A P DE CARVALHO, D de ALMEIDA
The Anatomical Record. Part A, Discoveries in Molecular, Cellular, and Evolutionary Biology
Igor R EfimovMark R Boyett
© 2021 Meta ULC. All rights reserved