12导联动态心电图对诊断冠心病无症状性心肌缺血的临床研究

12-lead Electrocardiography Dynamic Coronary Heart Disease(CHD) of Asymptomatic Myocardial Ischemia of Clinical Research

目的探讨无症状心肌缺血的临床特点和发生规律。方法对60例冠心病患者应用24h动态心电图检测。结果共检出心肌缺血1265阵次,无症状心肌缺血的发生显著高于有症状心肌缺血,占85.5%;发作高峰在上午6:00～12:00,00:00～6:00最少,但夜间缺血持续时间及ST段压低幅度明显重于白昼。结论无症状心肌缺血是冠心病最常见的表现形式,应和有症状心肌缺血给予同样重视。

Objective To explore the clinical characteristic and occurrence rule of silent myocardial ischemia（SMI）.Methods 24 hour dynamic electrocardiogram monitoring was performed in 60 cases of coronary heart disease（CHD）.Results 1 265 times of myocardial ischemia was found.The frequency of occurrence of SMI（85.5%）was obviously higher than that of symptomatic ischemia.The frequency of SMI was highest between 6 am to 12 am,and it was lowest between 0 am to 6 am though it was more serious at night than that at daytime.Conclusion SMI is the most common manifestation in patients with CHD.It should be paid the attention as much as the symptomatic ischemia.