Survival and arrhythmic risk among ischemic and non-ischemic heart failure patients with prophylactic implantable cardioverter defibrillator only therapy: A propensity score-matched analysis

•This is the first real-world registry analysing hard endpoints in prophylactic ICD-only HF patients with narrow QRS complex.•A propensity-score analysis has never been performed in this clinical setting.•All-cause death and arrhythmic risks were similar among ischemic and non-ischemic patients after four years of mean follow-up.•The benefit in non-ischemic HF patients might be the same, so ICD therapy should not be restricted to ischemic patients.•The decision to implant and ICD must be individualized in patients with more comorbidity.