VT: ventricular tachycardia; LVZ: low voltage zone (<0.5mV); LP: late potential; FP: fragmented potential; MA: mitral annulus; LV: left ventricle; DA: diagonal artery; OM: obtuse marginal artery; LCX: left circumflex artery; PDA: posterior descending artery; AIVR: accelerated idioventricular rhythm.