PMID: 6175713Jan 1, 1982

The supernormal phase of intraventricular conduction: normalization of intraventricular conduction of premature atrial beats

Journal of Electrocardiology
H O KleinL Schamroth

Abstract

This report presents the analysis of a case in which numerous atrial extrasystoles, associated with normal intraventricular conduction, occurred during sinus rhythm conducted with right bundle branch block. The wide overlap of coupling intervals of normally conducted extrasystoles and other extrasystoles with right bundle branch block seemed prima facie to negate the possibility of supernormality. Rearrangement of these intervals, however, to allow for the timing of right bundle branch depolarization with respect to the ensuing QRS complex, resulted in a clear cut separation of all normalized complexes from those with right bundle branch block. All normalized extrasystoles were localized in a zone very early in the cycle. This finding, in the presence of atrial extrasystoles with normal P-R intervals, strongly supports the mechanism of supernormality in this case. Alternate explanations do not appear to be tenable.

References

Feb 1, 1976·British Heart Journal·L Schamroth
Apr 1, 1973·Circulation·J I Haft
Nov 1, 1974·Circulation Research·J F Spear, E N Moore
Feb 1, 1973·Circulation·A S AghaR J Myerburg
Apr 1, 1972·British Heart Journal·A MazzoleniR N Class
Aug 1, 1972·Circulation·R A MassumiD T Mason
Nov 1, 1971·British Heart Journal·A Mazzoleni, E Fletcher
Dec 1, 1969·The American Journal of Cardiology·R A Massumi, J C Rios
May 1, 1969·British Heart Journal·L Schamroth
Apr 1, 1970·Chest·M J Mihalick, C Fisch
Jul 1, 1968·Circulation·G K MoeJ Merideth

Citations

May 11, 2004·Journal of Electrocardiology·Vincenzo CarboneMaria Pia Calabrò
Sep 26, 2003·Journal of Electrocardiology·Julían Ortega-CarnicerFilomena Ceres
Jul 19, 2011·Annals of Noninvasive Electrocardiology : the Official Journal of the International Society for Holter and Noninvasive Electrocardiology, Inc·Rituparna S ShindeG Oreto
Jul 1, 1995·Heart & Lung : the Journal of Critical Care·F LuzzaG Oreto
Sep 10, 2016·Journal of Electrocardiology·Acácio Fernandes-CardosoAndrés Ricardo Pérez-Riera
Sep 1, 1992·Pacing and Clinical Electrophysiology : PACE·F LuzzaI M Scimone
May 18, 2013·Archivos de cardiología de México·Alfredo de Micheli SerraAlberto Aranda Fraustro

Related Concepts

Left Bundle Branch of His
Anterior Fascicular Block
Electrocardiographic Recorders
Electrophysiology (Science)
Premature Cardiac Complex
Right Atrial Structure
Cardiac Conduction System
Left Ventricular Structure
Ventricular Function

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.