本文三组对象皆为男性、40岁以上。心电图无ST-T变化。(1)正常对照35人。(2)陈旧性心肌梗塞20人。(3)活动平板运动试验阳性者20人。分析其静息心电向量图T环的方位、形态、长/宽比值、运行方向。结果;异常T环出现在心肌梗塞组为95％,运动试验阳性组为70％,正常对照组为11％。提示异常T向量环可作为诊断冠心病参考指标,且可用于心肌梗塞随访。 This article three groups of objects are all men over the age of 40. No ECG ST-T changes. (1) 35 normal controls. (2) 20 old myocardial infarction. (3) active treadmill exercise test positive 20 people. Analysis of its resting ECG vector T-ring orientation, morphology, length / width ratio, direction of operation. Results: The abnormal T-ring appeared in 95% of the myocardial infarction group, 70% in the positive group and 11% in the normal control group. Prompt abnormal T vector ring can be used as a reference for the diagnosis of coronary heart disease, and can be used for myocardial infarction follow-up.