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应用动态心电图监测７８例陈旧性心肌梗塞患者，根据有无无症状性ＳＴ段改变随机分为两组：有无症状性ＳＴ段改变组４１例，无ＳＴ段改变组３７例，并进行平均４４月的追踪随访。随访内容为：每年重复做１次动态心电图，有无再次发生心肌梗塞、猝死或其它原因的死亡。结果：陈旧性心肌梗塞无症状心肌缺血组死亡１１例（占２７％），无心肌缺血ＳＴ段改变组死亡２例（占５％），二者差异非常显著（Ｐ＜０．００１）。作者认为无症状性心肌缺血是陈旧性心肌梗塞预后不良的危险因素之一，其原因可能与冠脉病变严重导致冠脉储备能力下降，以及心脏生理负荷重和心功能差等因素有关。积极有效地防治无症状性心肌缺血以降低病死率。
The application of Holter monitoring 78 patients with old myocardial infarction, according to the presence or absence of asymptomatic ST segment changes were randomly divided into two groups: 41 cases with asymptomatic ST segment changes, 37 cases without ST segment changes, and an average of 44 Month follow-up. Follow-up content: Do 1 repeat each year Holter, with or without recurrence of myocardial infarction, sudden death or other causes of death. Results: 11 cases (27%) died of asymptomatic myocardial ischemia in old myocardial infarction group, 2 cases died of myocardial ischemia without ST segment change (5%), the difference was significant (P <0.001) . The authors believe that asymptomatic myocardial ischemia is one of the risk factors for poor prognosis of old myocardial infarction, which may be related to the serious coronary artery disease lead to decreased coronary reserve capacity, as well as cardiac physiology load and poor heart function and other factors. Active and effective prevention and treatment of asymptomatic myocardial ischemia to reduce mortality.