[Recording of conduction tissue potentials in intraventricular conduction disorders. (apropos of 147 patients)].
147 patients, 31 controls and 116 patients with intraventricular conduction disturbances, have been submitted to an endocardial investigation: HR lengthening in case of bundle-branch block indicates a low diffusion of the conduction disturbances and has a pejorative signification. The most important legthenings of this interval have been observed in the cases with delay in the common trunk of His bundle: -- In case of trunkular delay, 66% of the patients have a HR interval longer than 80 msec, and the average value of HR is 82 msec. -- In the absence of obvious trunkular delay, 8% of the patients only have a HR interval longer than 80 msec, with an average value of 67 msec. For these latter patients no branch potential was recorded. -- In some cases one is certain of the presence of a conduction disturbance of both branches and the HR value then never exceeded 60 msec. -- Branch potential recording makes it possible to determine the site of the conduction disturbance of the branch and show mild variations of the HR interval and of both components.
D000200:Action Potentials; D002036:Bundle of His / Q000503:physiopathology; D002037:Bundle-Branch Block / Q000503:physiopathology; D004562:Electrocardiography; D006327:Heart Block / Q000503:physiopathology*; D006329:Heart Conduction System / Q000503:physiopathology*; D006352:Heart Ventricles; D006801:Humans
L'enregistrement des potentiels du tissu de conduction dans les troubles de conduction intra-ventriculaire. (a propos de 147 malades)