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用动态心电图（ＤＣＧ）监测无症状性心肌缺血（ＳＭＩ）情况，结果３４例无冠心病史、无症状，但具有冠心病高危因素（高血压、高血脂、吸烟、冠心病家族史）二项以上者存在ＳＭＩ。１７６例冠心病者中，心肌梗塞组ＳＭＩ发作次数为心绞痛发作次数的６．８倍，心绞痛组为８．８倍。ＳＭＩ发作时心率与２４小时平均心率无明显差别（Ｐ＞０．０５）。发作时间以５～１３时为多。对４０例采用钙拮抗剂及硝酸甘油制剂治疗，结果无冠心病史无症状组、心梗后ＳＭＩ组、心绞痛伴ＳＭＩ组ＳＴ段缺血性下移次数分别减少了７６．９％和７１．０％、７３．８％。
Asymptomatic myocardial ischemia (SMI) was monitored by dynamic electrocardiogram (DCG). Results There were 34 patients with no history of coronary heart disease, asymptomatic, but with high risk of coronary heart disease (hypertension, hyperlipemia, smoking, family history of coronary heart disease) SMI above items exist. Among the 176 coronary heart disease patients, the number of SMI attacks in myocardial infarction group was 6.8 times of that of angina pectoris and 8.8 times in angina pectoris group. SMI attack heart rate and 24-hour average heart rate no significant difference (P> 0.05). Attack time to 5 to 13 o’clock. Forty patients treated with calcium antagonist and nitroglycerin showed no symptoms of coronary heart disease, SMI group and angina pectoris with SMI group decreased by 76.9% and 71% respectively. 0%, 73.8%.