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目的分析非ST段抬高型心肌梗死(NSTE-AMI)患者心电图的QRS波时限,通过与冠状动脉造影(CAG)对比,探讨其判断左主干或三支病变的价值。方法测量106例急性非ST段抬高型心肌梗死患者的体表心电图QRS波时限,结合冠状动脉造影结果,分析其诊断左主干或三支病变的敏感性、特异性及相关性。结果QRS波时限与左主干或三支病变具有相关性(OR9.04,p<0.01),QRS波时限≥90ms预测左主干或三支病变的敏感性为88%,特异性为88%。结论QRS波时限是急性非ST段抬高型心肌梗死患者左主干或三支病变非常灵敏的预测因子。
Objective To analyze the QRS wave duration of electrocardiogram in patients with non-ST-segment elevation myocardial infarction (NSTE-AMI) and compare the value of coronary artery angiography (CAG) with coronary angiography (CAG) to determine the value of left main or three-vessel lesion. Methods The surface electrocardiographic QRS wave duration was measured in 106 patients with acute non-ST-segment elevation myocardial infarction. The sensitivity, specificity and relativity of the diagnosis of left main or three lesions were analyzed with coronary angiography. Results The QRS wave duration was correlated with left main or three lesions (OR9.04, p <0.01). The QRS wave duration ≥90 ms predicted the sensitivity or specificity of left main or three lesions to be 88% and 88% respectively. Conclusions QRS wave duration is a very sensitive predictor of left main or three-vessel disease in patients with acute non-ST-segment elevation myocardial infarction.