用体表高频心电图分析89例冠心病患者与47例正常人,患者组中常规心电图有缺血性ST—T改变者与常规心电图正常者平均切迹数分别为4.5个与3.1个,阳性率分别为96.1％与81.6％,正常对照组平均切迹数1.2个,阳性率为8.5％,患者组平均切迹数和阳性率均明显高于对照组(P<0.01),本文结果表明体表高频心电图对冠心病诊断有较高的敏感性和特异性(分别为89.9％和91.5％),而假阳性和假阴性不高(分别为10.1％和8.5％),总符合率达88.5％。 The results of surface electrocardiogram (ECG) analysis of 89 patients with coronary heart disease and 47 normal subjects showed that the average number of notch on conventional electrocardiogram with ischemic ST-T change in patients with normal ECG was 4.5 and 3.1, respectively, which were positive (96.1% vs 81.6%, respectively). The average number of tangent marks in the normal control group was 1.2 and the positive rate was 8.5%. The average number of notch and the positive rate in the patients were significantly higher than those in the control group (P <0.01) Table high-frequency electrocardiogram had a higher sensitivity and specificity for the diagnosis of coronary heart disease (89.9% and 91.5%, respectively), while the false positives and false negatives were not high (10.1% and 8.5% respectively) with a total compliance rate of 88.5 %.