STc延长与QRS-ST夹角阳性对冠心病诊断价值

Diagnostic Value of STc Prolongation and Positive QRS-ST Included Angle for Coronary Atherosclerotic Cardiopathy

目的 :对常规正常心电图进行STc延长及QRS_ST夹角的分析 ,以探讨对冠心病诊断的价值。方法 :对71例心电图无ST段改变的病人进行冠状动脉造影 ,36例冠状动脉狭窄≥50 %为冠心病组 ,35例狭窄<50 %或无狭窄为对照组 ,STc≥0 12s为延长。同时进行QRS_ST夹角阳性分析。结果 :STc延长冠心病组34例 (94 44 % ) ,对照组3例 (8 57% ),两组比较χ2=52.43(P<0.01);冠心病组STc为 (0 1248±0 0055)s ,对照组为 (0 1133±0 0011)s ,两组比较t=14.62(P<0.01);冠心病组QRS_ST夹角阳性30例 (83 33% ) ,对照组6例 (17 14 % ),两组比较 χ2=28 51(P<0.01)。结论 :STc延长和QRS_ST夹角阳性分析有助于冠心病早期诊断。

Objective:To investigate the diagnostic value of STc prolongation and posit ive QRS_ST included angle for coronary atherosclerotic cardiopathy(CAC).Methods :A coronary arteriography was performed in 71 patients with CAC.These patients then were divided into a coronary artery narrowing≥50% group(CAC group,n=36)an d a coronary artery narrowing <50 group(control group,n=35).STc ≥0.12 second(s) was named STc prolongation.Their QRS_ST included angles were analyzed.Results: There were 34 cases with STc prolongation(STc=0.124 8±0.005 5s) in CAC group(94 .4%),and there were 3 cases with STc prolongation(Stc=0.113 3 ±0.001 1s)in con trol group(8.57%) There were 30 cases wth positive QRS_ST included angle in CA C group(83.33%),and there were 6 cases with positive QRS_ST included angle in c ontrol group(17.14%).Between the two groups,there were significant differences in STc prolongation and positive QRS_ST included angle(both P<0.01).Conclusion: The analysis of STc prolongation and positive QRS_ST included angle is conductiv e to early diagnosis of CAC.