Mortality Implications of Appropriate Implantable Cardioverter Defibrillator Therapy in Secondary Prevention Patients: Contrasting Mortality in Primary Prevention Patients From a Prospective Population‐Based Registry

Background We sought to examine the mortality impact of appropriate implantable cardioverter defibrillator ( ICD ) therapy between patients who received ICD for primary versus secondary prevention purposes. Methods and Results From a prospective, population‐based registry, we identified 7020 patients who underwent de novo ICD implantation between February 2007 and May 2012 in Ontario, Canada. The primary outcome was all‐cause mortality. We used...