摘要
本文共检测119例，其中冠心病69例（含室性心动过速17例）和正常人50例，分别在滤波后QRS综合向量模（A窗）和单导绝对稳过模（B窗）上选取≤40μV的120ms低振幅信号进行频谱分析，以X、Y、Z导联60～120Hz的平均高频面积（HFA）为检测参数，发现各组病人两窗口间有显著差异（p＜0.01）。若以HFA≥740和1240μV为两窗口阳性标准，则B窗对本组室性心动过速的敏感性、特异性和准确性为88.24、97.62和94.92％，A窗为64.71、95.24和86.44％，说明B窗优于A窗。
The results of frequency spectrum analysis of signal ?averaged electrocardiogram with Fast Fourier transformation were studied on A and B windows in 17 patients with ventricular tachycardia (VT.group I), 52 patients with coronary heart disease without (VT,group II ) and 50 healthy volunteers (group III ).The onset both A and B windows were selected from vector梥ummed QRS magnitude and individual absolute filter lead when QRS forces last decreased to below 40uV and had a duration of 120ms. High frequency spectral area (HFA,60~120Hz) was calculated.
Results in both A and B windows had significant difference among three groups (p<0. 01). The criteria of HFA>l 240u V for B window gave a sensitivity of 88. 24% ,specificity of 97. 62% and odds ratio of 20. 15. The criteria of HFA>740uV for A window gave a sensitivity of 64. 71% .specificity of 95. 24% and odds ratio 6. 48. We think that A window is superior to B window.
出处
《重庆医药》
CSCD
1992年第6期324-326,共3页
关键词
心室晚电位
信号平均
心电图
ventricular late potential signal梐veraged electrocardiogram
