动态心电图ST段改变在无症状冠心病诊断中的临床意义

The Clinical Significance of the Changes of ST Segment in Dynamic Electrocardiogram on the Diagnosis of Symptomless Coronary Artery Disease

目的：探讨sT段改变在冠心病诊断中的临床意义。方法：对2003年1月至2007年1月138例动态心电图监测，分析sT段改变。结果：138例患者24h监测发现在所有ST段下移1mm以上的缺血发作701次，无症状发作613次，其中休息和睡眠时发作504次，持续时间为3—5rain；有症状发作88次，其中体息和睡眠53次，日常活动时25次，持续时间为1～3min，DCG检测中有明显的心肌缺血表现，sT段降低幅度0．1～0．3mV。结论：DCG作为判断冠心病患者有无心肌缺血的依据，是简单、可靠、有效无创的方法。

Objective： To investigate the effect of changes of ST segment on the diagnosis of Coronary Artery Disease（CAD）. Method： 138 cases were monitored by Dynamic Electrocardiogram （DCG） during Jan. 2003 to Jan. 2007. We analyzed the ST changes of the cases. Result：There were 701 breaks of ischemia with the descent of the ST segment on DCG. There were 613 breaks of ischemia symptomless in which 504 broke while at rest or sleeping, lasting for 3 - 5min and 88 breaks were symptomatic in which 53 broke while at rest and 25 broke in daily activities, lasting for I ~ 3 min and there were significant changes of ischemia on DCG and the ST segment descent for 0.1 ~ 0.3 mV. Conclusion： DCG is a good indication for myocardial ischemia of CAD cases and it is a simple, reliable and effective method.