摘要
为了将心肌缺血的信息可视化,提出了一种基于ST段损伤向量罗盘显示的心肌缺血检测方法。该方法用ECG设备采集十二导联心电信号,计算各导联的偏移值,用最小二乘解矛盾方程组的方法逆投影到罗盘上,得到ST损伤向量,该向量的大小代表缺血的严重程度,方向指向缺血部位,并用紫色标记。实验对32位心肌缺血患者做检测,将其结果与心电图检测法进行对比,Kappa值为0.903 6,敏感性96.2%,特异性100%,准确性96.9%,阳性率81.3%,P>0.1;对比冠状动脉造影法,Kappa值为0.7949,敏感性96.2%,特异性83.3%,准确性93.8%,阳性率81.2%,P>0.1。数据表明该方法和这两种方法之间都具有很高的一致性,无显著性差异,准确性高,因此ST损伤向量的罗盘显示方法是心肌缺血检测领域一种很有价值的诊断手段。
ST injury vector displayed in the compass was proposed to visualize the location and extent of myocardial ischemia. Analysis of ST deviations from the standard 12-lead ECG allows for estimation a ST injury vector. The direction of this vector can be used to localize ischemia and the magnitude of the vector correlated with the extent of ischemia. Thirty-two patients with myocardial ischemia were detected by the ST injury vector method. The result was compared with electrocardiogram, Kappa value was 0. 903 6, sensitivity 96.2%, specificity 100% and accuracy 96.9%, positive rate of 81.3%, P〉0. 1; And compared with the coronary angiography, Kappa value was 0. 7949, sensitivity 96.2%, specificity 83.3% and accuracy 93.8%, positive rate of 81.2%, P〉0. 1. It proved that there are high consistency and no significant difference between ST injury vector and electrocardiography and coronary angiography, and the accuracy is high. ST injury vector is valuable in the field of myocardial ischemia.
出处
《电子测量技术》
2015年第11期27-31,共5页
Electronic Measurement Technology
基金
国家自然科学基金项目(61172036)资助项目
