Association between mortality and implantable cardioverter‐defibrillators by aetiology of heart failure: a propensity‐matched analysis of the WARCEF trial

Aims There is debate on whether the beneficial effect of implantable cardioverter‐defibrillators (ICDs) is attenuated in patients with non‐ischaemic cardiomyopathy (NICM). We assess whether any ICD benefit differs between patients with NICM and those with ischaemic cardiomyopathy (ICM), using data from the Warfarin versus Aspirin in Reduced Cardiac Ejection Fraction (WARCEF) trial.