Keywords: ناهنجاریهای ابشتین; AV; atrioventricular; EPS; electrophysiologic study; ILR; implantable loop recorder; ICD; implantable cardioverter-defibrillator; VT; ventricular tachycardia; WPW; Wolff-Parkinson-White syndrome; Arrhythmia surgery; Catheter ablation; Cone procedure; Cong