title: Wide QRS, narrow QRS: what's the difference?
authors: Brian
authors: B
authors: Olshansky
mesh_terms: D002037:Bundle-Branch Block / Q000150:complications; D003327:Coronary Disease / Q000150:complications / Q000628:therapy*; D016757:Death, Sudden, Cardiac / Q000517:prevention & control; D017147:Defibrillators, Implantable; D004562:Electrocardiography; D006801:Humans; D015337:Multicenter Studies as Topic; D011237:Predictive Value of Tests; D016032:Randomized Controlled Trials as Topic; D012189:Retrospective Studies; D017180:Tachycardia, Ventricular / Q000517:prevention & control* / Q000628:therapy; D014693:Ventricular Fibrillation / Q000517:prevention & control* / Q000628:therapy