56例室速病人中13例为非早搏型室速,晚电位均阴性;43例为早搏型室速,晚电位阳性者占32.6%,其中早搏型持续性室速中晚电位阳性率高达66.7%,表明早搏型室速与晚电位相关。晚电位阳性者中71.4%出现持续性室速,66.7%程控心室刺激可诱发室速,表明晚电位对持续性室速有预测作用。14例晚电位阳性者均有器质性心脏病,其中7例伴心功能不全,提示晚电位是心脏的病理性指标之一。 Among 56 cases of VT, 13 cases were non-premature ventricular tachycardia and none were late; 43 cases were premature ventricular tachycardia and 32.6% were late potentials, of which the positive rate was 66.7 %, Indicating that premature ventricular tachycardia and late potential related. Totally 71.4% of patients with late potentials showed sustained VT, while 66.7% of patients with programmed VSAT induced VT, suggesting that late potentials had a predictive effect on persistent VT. 14 cases of posterior potential positive organic heart disease, including 7 cases with cardiac insufficiency, suggesting that the late potential is one of the pathological indicators of the heart.