نتایج جستجو برای: concealed conduction

تعداد نتایج: 41999  

Introduction: The present study is aimed to evaluate electrophysiological remodeling of atrioventricular (AV) node and ventricular conduction during experimental atrial fibrillation (AF) model in isolated heart of cirrhotic rats. Methods: Cirrhosis-induced electrophysiological remodeling was evaluated in 24 isolated retrogradely perfused rat hearts in 2 groups (control and cirrhotic). Cirrho...

Journal: :British heart journal 1981
L Littmann R H Svenson

Two cases with a concealed left-sided accessory atrioventricular bypass tract are described. In both, functional longitudinal dissociation of the atrioventricular node narrowed the range of atrial premature beat coupling intervals which could initiate re-entry using the accessory pathway. In case 1 early premature atrial beats were followed by an atrioventricular nodal re-entrant echo. The atri...

Journal: :British heart journal 1974
A Takeshita S Tanaka M Nakamura

no H potential or by a prolonged AH interval, indicating concealed retrograde penetration of the His bundle. Thefact that retrograde conductionaffectedanterograde conduction indicates that the anterogradeandretrograde pathways are not totally independent. Atropine significantly improved retrograde conduction; this suggests that the retrograde conduction occurs through the conduction system in a...

Journal: :Chest 1977
R A Carleton

Electrocardiographic excerpts from three patients demonstrate bigeminy, concealed bigeminy, trigeminy, concealed trigeminy, and Wenckebach's pattern of variation in the coupling interval from sinus beat to ventricular ectopic beat. These diverse manifestations of ventricular ectopy support the hypothesis that reentry in man reflects conduction of an initial impulse, with delay, to cause the cou...

Journal: :Japanese circulation journal 2001
T Katoh T Ohara E M Kim H Hayakawa

Electrophysiological findings suggest that concealed anterograde conduction through accessory pathways may exist even during sinus rhythm in patients with so-called concealed Wolff-Parkinson-White (WPW) syndrome. To evaluate the pre-excitation characteristics in various types of WPW syndrome, high-resolution electrocardiograms were analyzed in 81 consecutive WPW syndrome patients and 50 age-mat...

Journal: :Circulation research 1967
E N Moore

The mechanism of the ventricular dysrhythmia associated with atrial fibrillation in isolated rabbit heart was studied by recording electrograms from right atrium and ventricle simultaneously with transmembrane action potentials recorded from single fibers within the A-V node and right bundle branch. In most experiments, the variation in ventricular cycle length during experimentally initiated a...

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