Study of Personalized Allocation of Defibrillators in Non-ischemic Heart Failure (SPANISH-1)

Who May Qualify: - Age ≥ 18 years at the time of screening. - Previously established diagnosis of Non-ischemic DCM - Optimised medical treatment at maximum tolerated doses for at least 3 months prior to the screening date. - NYHA functional class II-III. - LVEF ≤ 35% documented by CMR as study procedure. - expected to live at least 12 months. Who Should NOT Join This Trial: - History of coronary artery disease justifying the presence of ventricular dysfunction, defined as: history of coronary revascularisation or presence of significant coronary stenosis (≥50% in left main or ≥70% in a major epicardial artery) on invasive or non-invasive coronary angiography (coronary CT) - Left ventricular dysfunction attributed to congenital heart disease, valvular disease, alcohol abuse or chemotherapy. - Hypertrophic or infiltrative cardiomyopathy, active myocarditis or constrictive pericarditis. - History of recovered sudden death or sustained ventricular tachycardia. - NYHA functional class IV. - Waiting list for cardiac transplantation in emergency 0. - Receiver of a solid organ transplant (lung, liver, heart or kidney). Always talk to your doctor about whether this trial is right for you.