Rate dependent left bundle branch block with gradual transition between normal intraventricular conduction and complete left bundle branch block. A case report.
A case of 70-year-old woman with ischemic heart disease is presented. The electrocardiogram showed atrial fibrillation and a tachycardia-dependent, left bundle branch block. A number of intermediate QRS patterns from normal intraventricular conduction to complete left bundle branch block were seen, and the transition was gradual. Increasing grades of aberrance were seen following a shorter preceding cycle length.
D000368:Aged; D001281:Atrial Fibrillation / Q000503:physiopathology; D002037:Bundle-Branch Block / Q000503:physiopathology*; D003327:Coronary Disease / Q000503:physiopathology; D004562:Electrocardiography; D005260:Female; D006329:Heart Conduction System / Q000503:physiopathology*; D006339:Heart Rate; D006801:Humans