title: Tachycardia-dependent left bundle branch block associated with bradycardia-dependent variable left bundle branch block.
mesh_terms: D000368:Aged; D001919:Bradycardia / Q000150:complications* / Q000503:physiopathology; D002037:Bundle-Branch Block / Q000209:etiology* / Q000503:physiopathology; D004562:Electrocardiography; D005260:Female; D006329:Heart Conduction System / Q000503:physiopathology; D006801:Humans; D013610:Tachycardia / Q000150:complications* / Q000503:physiopathology