The primary objective of this study is to evaluate the hypothesis that implantable cardioverter defibrillator (ICD) therapy would decrease the risk of death from any cause in comparison to optimal heart failure (HF) care without ICD insertion in patients with NIDCM, left ventricular ejection fraction (LVEF) ≤35% and presence of myocardial fibrosis on cardiac magnetic resonance (CMR) imaging.
Patients with diagnostic CMR images for assessment of LGE/fibrosis and evidence/presence of non-ischaemic myocardial fibrosis/scar will be randomized to the following treatment groups in a 1:1 ratio: ICD group or Optimal HF care group.