Keywords: AKAP, A-kinase anchor protein; ECG, electrocardiogram; ERS, early repolarization syndrome; Early repolarization syndrome; Genetic analysis; ICD, implantable cardioverter-defibrillator; PMVT, polymorphic ventricular tachycardia; PVC, premature ventricular complex; VF, ventricular fibrillation; Ventricular arrhythmias.