title: Is the left bundle branch really blocked when suggested by the electrocardiogram?
authors.forename: Hein J
authors.initials: HJ
authors.lastname: Wellens
mesh_terms: D002037:Bundle-Branch Block / Q000503:physiopathology*; D058406:Cardiac Resynchronization Therapy / Q000379:methods*; D005260:Female; D006329:Heart Conduction System / Q000503:physiopathology*; D006333:Heart Failure / Q000503:physiopathology* / Q000628:therapy*; D006801:Humans; D008297:Male