“…Transcatheter alcohol septal ablation (ASA) is an alternative to surgery. Dai et al [59] used CMR to demonstrate that ASA significantly decreases energy loss within the left ventricular and aortic root linearly with the reduction of LVOT gradient. Sudden cardiac death (SCD) caused by fatal ventricular tachyarrhythmias (VTAs) is a major concern for patients with HCM, and the indication for implantable cardioverter-defibrillator (ICD) must be carefully assessed.…”