Electrophysiologic properties of atrial muscle in paroxysmal atrial fibrillation.

The American Journal of Cardiology
K HashibaM Mori

Abstract

The electrophysiologic properties of atrial muscle were studied by programmed atrial stimulation in 42 patients with paroxysmal atrial fibrillation (PAF) and in 53 control patients without PAF. Single premature atrial stimulation was given at the right atrial appendage following 8 basic stimuli with a basic cycle length of 500 ms. Repetitive atrial firing (RAF) was defined as the occurrence of 2 or more successive premature atrial activations following single premature atrial stimulation. Fragmented atrial activity (FAA) was defined as an increase by more than 75% of the duration of the atrial electrogram in response to a single premature stimulation. Interatrial conduction delay was defined as an increase of the conduction time by more than 50 ms in response to a single premature stimulation. RAF was induced in 26 of 42 patients (61.9%) with PAF and in 14 of 53 control patients (26.4%). FAA and interatrial conduction delay were elicited in 69.0 and 80.9% of patients with PAF and in 34.0 and 56.6% of control patients, respectively. In 16 patients with PAF in whom RAF was not induced, FAA developed in 11 patients (68.8%). In 88.1% of 42 patients with PAF and in 41.5% of 53 controls, RAF or FAA, or both, were elicited by atrial p...Continue Reading

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Citations

Oct 1, 1996·Clinical Cardiology·M Reardon, A J Camm
Nov 24, 1995·International Journal of Cardiology·K IshibashiM Nakagawa
Jan 1, 1994·Journal of Electrocardiology·O A CenturionK Yano
Jun 9, 2000·Annual Review of Physiology·S NattelL Yue
Mar 10, 2004·Chest·Kimmo Markus PorthanMarkku Mikael Partinen
Oct 17, 1996·The American Journal of Cardiology·A J Camm, O A Obel
Apr 1, 1997·Journal of Cardiovascular Pharmacology and Therapeutics·D GallikB N Singh

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