Keywords: ANK2, ankyrin-2 gene; Ankyrin; ECG, electrocardiogram; EP, Electrophysiology; ER, early repolarization; Early repolarization; ErS, early repolarization syndrome; Genetics; ICD, implantable cardioverter-defibrillator; J-wave syndrome; LVEF, left ventricular ejection fraction; PVC, premature ventricular contraction; VF, ventricular fibrillation; Ventricular fibrillation.