本研究应用信号平均心电图技术检测了50例无心脏病对照组受检者、61例非室壁瘤病人(均为陈旧前壁心肌梗塞)及31侧经心电图、核素及心脏彩超确诊的室壁瘤病人的心室晚电位(VLP),晚电位阳性率分别为2%,11%,29%,组间有显著性差异,且与心功能低下无关。其中12例 VLP 阳性病人,服用倍他乐克1个月获得部分改善,推测β阻滞剂可改善陈旧心肌梗塞病人的晚电位。 In this study, 50 subjects with no heart disease control group, 61 non-aneurysm patients (both of which were anterior anterior myocardial infarction) and 31 patients were diagnosed by electrocardiogram, radionuclide and echocardiography using signal-averaged ECG technique. The positive rates of ventricular late potentials (VLP) and late potentials of tumor patients were 2%, 11% and 29%, respectively. There was a significant difference between the two groups, which was not associated with low cardiac function. Twelve of the VLP-positive patients, taking betametastole for 1 month, achieved partial improvement, presumably beta blockers improved late potentials in elderly patients with myocardial infarction.