title: [Longitudinal dissociation of the bundle of His and infra-His block].
abstract: A case with advanced supra-His block and escape pacemaker at the proximal His block with longitudinal dissociation of the bundle of His is presented. These alterations caused a complete left bundle branch block and prolonged HV interval obtaining the normalization of the QRS after distal His extrasystole. We comment on the differential diagnosis between first degree intra-His and infra-His blocks.
mesh_terms: D000368:Aged; D002036:Bundle of His / Q000503:physiopathology*; D002037:Bundle-Branch Block / Q000150:complications / Q000503:physiopathology*; D005117:Cardiac Complexes, Premature / Q000209:etiology; D003937:Diagnosis, Differential; D004562:Electrocardiography; D006327:Heart Block / Q000175:diagnosis; D006329:Heart Conduction System / Q000503:physiopathology*; D006801:Humans; D008297:Male
vernacular_title: Disociación longitudinal del haz de His y bloqueo infrahisiano.