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目的 观察心肌梗死后和稳定型心绞痛病人在心肌缺血发生时间上的差异。方法 以动态心电图监测系统分别对心脏梗死和稳定型心绞痛病人进行了24h动态检查。结果 在心肌梗塞组的65次心肌缺血发作中,白天31次,夜间34次(P>0.05);稳定型心绞痛组的34次心肌缺血发作中,白天21次,夜间13次(P<0.05)。结论 心肌梗塞后病人心肌缺血发生时间无明显差异;稳定型心绞痛病人心肌缺血多发生在白天,其原因可能与白天心肌耗氧量增加有关。
Objective To observe the difference of myocardial ischemic time between myocardial infarction patients and stable angina pectoris patients. Methods The dynamic electrocardiogram monitoring system was used for dynamic examination of patients with cardiac infarction and stable angina pectoris 24h respectively. Results Thirty-six episodes of myocardial ischemia in MI group were performed during the daytime and at nighttime (P> 0.05). Among 34 episodes of myocardial ischemia in the stable angina group, 21 were during daytime and 13 during nighttime (P < 0.05). Conclusion There was no significant difference in myocardial ischemic time after myocardial infarction. Myocardial ischemia occurred more frequently during daylight in patients with stable angina, which may be related to the increase of myocardial oxygen consumption in daytime.