Association Between Myocardial Substrate, Implantable Cardioverter Defibrillator Shocks and Mortality in MADIT-CRT

Study Questions:

Was there an association between myocardial substrate, implantable cardioverter-defibrillator (ICD) shocks, and mortality in the MADIT-CRT (Multicenter Automatic Defibrillator Implantation Trial-Cardiac Resynchronization Therapy) trial?