动态心电图ST段、QTc间期预测冠心病患者心肌缺血的价值

目的:探讨动态心电图ST段、QTc间期对冠心病(CHD)患者心肌缺血的预测价值.方法:选择高度怀疑CHD心肌缺血患者250例,完善24 h动态心电图及冠脉造影检查.分析ST段、QTc间期的诊断效能,同时绘制ROC曲线,计算曲线下面积,评估上述参数的预测价值.结果:250例患者中,冠脉造影显示182例存在心肌缺血,68例...

The value of ST segment and QTc interval of 24-hour Holter monitoring in predicting myocardial ischemia in patients with coronary heart disease

Objective:To explore the value of ST segment and QTc interval of 24-hour Holter monitoring in predicting myocardial ischemia in patients with coronary heart disease(CHD).Methods:A total of 250 patients with suspected myocardial ischemia in patients with CHD were enrolled in the study.24-hour Holter monitoring and coronary angiography were performed in all patients.The diagnostic efficacy of ST segment and QTc interval was analyzed.The ROC curve was drawn and area under curve(AUC)was calculated to evaluate the predictive value of the above parameter.Results:Among the 250 patients,there were 182 cases with myocardial ischemia and 68 cases without myocardial ischemia.130 cases were positive and 120 cases were negative in ST segment detection.The QTc interval showed positive results in 117 cases and negative in 133 cases.The combined examination showed positive results in 132 cases and negative in 118 cases.The AUC of ST segment,QTc interval and their combined diagnosis was 0.9235,0.8873 and 0.9532 respectively.The AUC of their combined diagnosis was the largest,95%CI was 0.6844-0.9638,sensitivity,specificity and accuracy was 71.98%,98.53%and 79.20%respectively,which were significantly higher than those of ST segment and QTc interval alone(P<0.05).Conclusion:The combined detection of ST segment and QTc interval of 24-hour Holter monitoring has certain predictive value for myocardial ischemia in patients with CHD.