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QRS Duration in High‐Resolution Methods and Standard ECG in Risk Assessment After First and Recurrent Myocardial Infarctions

Background: Prolonged QRS duration (QRSd) is associated with increased mortality after myocardial infarction (MI). Only little data exist about its predictive ability and relationships to clinical variables in the present era of active treatment of myocardial ischemia and cardiac dysfunction. We investigated whether QRSd in high‐resolution methods and standard ECG predict arrhythmic events and cardiac death in post‐infarction patients with cardiac dysfunction and how it relates to clinical variables, with a special emphasis on history of previous MI.