title: Narrow and broad QRS complexes: what is the mechanism?
authors: Department of Electrophysiology, The Heart Hospital, University College London, UK. oliver.segal@uclh.nhs.uk
authors: Oliver R
authors: OR
authors: Segal
authors: Anthony W C
authors: AW
authors: Chow
authors: Pier D
authors: PD
authors: Lambiase
mesh_terms: D000328:Adult; D001145:Arrhythmias, Cardiac / Q000209:etiology / Q000503:physiopathology*; D004562:Electrocardiography; D006329:Heart Conduction System / Q000503:physiopathology*; D006352:Heart Ventricles; D006801:Humans; D008297:Male; D009203:Myocardial Infarction / Q000150:complications*; D017574:Parasystole / Q000503:physiopathology*