AAD, anti-arrhythmic drug; AEAD, absolute earliest activation time discrepancy; AIV, anterior Interventricular vein; ASV, aortic sinus of Valsalva; CCB, calcium channel blocker; GCV, great cardiac vein; IDT, intrinsicoid deflection time; LVEF, left ventricular ejection fraction; MDI, maximum deflection index; VA, ventricular arrhythmia; PdW, pseudo-delta wave; VT, ventricular tachycardia; PVC, premature ventricular complex; QRSd, QRS duration; RBBB, right bundle branch block;