目的探讨冠心病(CHD)患者无症状心肌缺血(SMI)动态心电图(DCG)监测规律。方法应用12导联DCG对183例临床确诊CHD患者进行24h监测并分析其缺血性ST段的发作阵次及规律。结果总共检出缺血性ST-T改变806阵次,其中613阵次(76.1%)为SMI。613阵次SMI中,477阵次(77.8%)发生于6:00—22:00,396阵次(64.6%)与体力活动、情绪紧张有关。结论 DCG对SMI的诊断具有较高的诊断率,可判明心肌缺血的诱发因素,对SMI病情的判断及早期防治有着重要的意义。 Objective To investigate the monitoring rules of asymptomatic myocardial ischemia (DCI) in patients with coronary heart disease (CHD). Methods 183 cases of clinically diagnosed CHD patients were monitored by 12-lead DCG for 24 h and their ischemic ST segment seizures were analyzed. Results A total of 806 ischemic ST-T changes were detected, of which 613 (76.1%) were SMI. Of the 613 SMIs, 477 (77.8%) occurred at 6: 00-22: 00,396 (64.6%) with physical activity and emotional stress. Conclusions DCG has a high diagnostic rate for the diagnosis of SMI. It can be concluded that the predisposing factors of myocardial ischemia have important meanings in judging and early prevention and treatment of SMI.