冠心病是中年以上人的常见病,主要是冠状动脉供血不足,使心肌缺血所致。目前尚缺乏既安全简便又敏感性高的早期客观诊断指标,心电图检查是一种简便安全的诊断方法,但敏感性低,阳性率仅45—50％,早期病例不易发现。因此,寻找一种早期诊断冠心病既简便安全又灵敏度高的客观指标,就成为冠心病临床研究的重要课题。 Coronary heart disease is a common disease of middle-aged people, mainly due to coronary insufficiency, myocardial ischemia caused. At present, there is a lack of safe and simple and sensitive early objective diagnostic indicators, ECG is a simple and safe method of diagnosis, but low sensitivity, the positive rate of only 45-50%, the early cases are not easy to find. Therefore, looking for an early objective diagnosis of coronary heart disease is simple and safe and high sensitivity, it has become an important issue in the clinical study of coronary heart disease.