PMID: 3584719Jun 1, 1987

Supernormal conduction in the accessory pathway of patients with overt or concealed ventricular pre-excitation

Journal of the American College of Cardiology
J PrzybylskiM B Rosenbaum

Abstract

It was recently shown that supernormal conduction in the diseased His-Purkinje system is more common than previously thought, and is always associated with prolongation of refractoriness. To assess whether supernormal conduction could also occur in the accessory pathway of patients with ventricular pre-excitation, 21 patients with manifestly prolonged refractoriness in the accessory pathway were studied. Under these conditions, programmed atrial stimulation revealed a phase of supernormal conduction in 16 (76%) of the 21. Therefore, what was believed to be a nonexistent or exceptional physiologic event was shown to be a rather common finding, at least under certain circumstances. Supernormal conduction occurred in all 7 patients with an anterograde refractory period of 480 to 980 ms, and in 5 of 10 patients with a refractory period greater than 1.0 second or with no anterograde conduction. Supernormal conduction could not be demonstrated in four patients with a refractory period less than or equal to 440 ms, but appeared in all four patients after the refractory period was prolonged by a rapid rate of stimulation or administration of ajmaline. The electrophysiologic changes underlying the occurrence of supernormal conduction in...Continue Reading

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Citations

Jul 30, 2009·Journal of Interventional Cardiac Electrophysiology : an International Journal of Arrhythmias and Pacing·Robert T StevensonMario González
Dec 6, 2008·Europace : European Pacing, Arrhythmias, and Cardiac Electrophysiology : Journal of the Working Groups on Cardiac Pacing, Arrhythmias, and Cardiac Cellular Electrophysiology of the European Society of Cardiology·Roberto RordorfMaurizio Landolina
Jul 1, 1992·Pacing and Clinical Electrophysiology : PACE·F SuzukiK Hiejima
May 1, 1995·Pacing and Clinical Electrophysiology : PACE·K Okishige, P L Friedman
Dec 12, 1997·Journal of Cardiovascular Electrophysiology·M SugutaY Iesaka
Dec 30, 1998·Journal of Cardiovascular Electrophysiology·P MauryM Zimmermann
Nov 15, 1991·The American Journal of Cardiology·P S Chen, E N Prystowsky
May 13, 2015·International Journal of Cardiology·P A ChialeM V Elizari
Apr 1, 1991·Circulation·Mario GonzálezG A Kidwell
Feb 8, 2007·Journal of Cardiovascular Electrophysiology·Jeremy J Lum, Reginald T Ho
Oct 2, 2015·Pacing and Clinical Electrophysiology : PACE·Pablo J Sánchez-MillánLuis Tercedor Sánchez

Related Concepts

Cardiac Conduction System
Left Ventricular Structure
Neural Pathways
Pre-Excitation Syndromes
Refractory Period, Electrophysiological

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