Outcomes
ventricular fibrillation, death, sudden death, cardiovascular death
SUDDEN DEATH, VENTRICULAR ARRHYTHMIA, CARDIAC ARREST, VENTRICULAR FIBRILLATION, SECONDARY, VENTRICULAR TACHYCARDIA, HEART, CORONARY ARTERY DISEASE
The primary outcome was a composite of all-cause death or aborted sudden death (in turn, defined as an appropriate ICD therapy or a resuscitated cardiac arrest). Secondary outcomes included cardiovascular death or aborted sudden death, appropriate ICD therapy or sustained ventricular arrhythmia (any ventricular fibrillation or ventricular tachycardia >100 beats per minute that lasts for >30 seconds or requires termination in <30 seconds as a result of hemodynamic compromiseAnalyses of the primary outcome were performed in these prespecified subgroups: device type (no device, CRT, non-CRT) indication for ICD (primary or secondary prevention), baseline left ventricular function, improvement in left ventricular function from baseline to 6 months (stratified by median change), extent of coronary artery disease, New York Heart Association functional class, and the type of recruiting center (dichotomized as centers that frequently/infrequently implanted ICDs or CRT devices in trial patients).