Left ventricular ejection fraction recovery under contemporary quadruple guideline-directed therapy and the need for ICD/CRT-D implantation in HFrEF: a retrospective single-center cohort study.
BACKGROUND Guidelines advise deferring primary-prevention implantable cardioverter-defibrillator (ICD) or cardiac resynchronization therapy-defibrillator (CRT-D) implantation until left ventricular ejection fraction (LVEF) is reassessed after at least three months of medical therapy in heart failure with reduced ejecti...