title: Left bundle branch block with changing QRS morphology.
authors.affiliation: Division of Cardiology, Michael Reese Hospital, Chicago, Illinois 60616, USA.
authors.forename: A
authors.initials: A
authors.lastname: Ranginani
authors.forename: V
authors.initials: V
authors.lastname: Doshi
authors.forename: P
authors.initials: P
authors.lastname: Denes
mesh_terms: D000368:Aged; D018880:Atrial Premature Complexes / Q000209:etiology / Q000503:physiopathology; D002036:Bundle of His / Q000503:physiopathology*; D002037:Bundle-Branch Block / Q000150:complications / Q000503:physiopathology*; D004562:Electrocardiography; D006339:Heart Rate / Q000502:physiology; D006801:Humans; D008297:Male