复极离散指数与缺血性ST-T改变诊断冠心病价值的比较

Comparison study of the diagnostic value of coronary heart disease between repolarization dispersion index and ischemic ST-T change

目的 :比较复极离散指数 (RDI)和缺血性 ST- T改变对冠心病 (CHD)的诊断价值。方法 :以选择性冠状动脉造影 (CAG)为标准诊断法 ,以可疑 CHD患者 2 2 7例为研究对象 ,利用四格表法 ,计算真实性评价指标。结果 :1尤登指数 (YI)最大值为 0 .49,相应的 RDI=0 .40为截断点 ;2 RDI和缺血性 ST- T改变诊断 CHD的灵敏度、特异度及准确度分别为 :6 6 .7%对 6 8.3% (P>0 .0 5 )、82 .2 %对 47.5 % (P<0 .0 1)及 73.6 %对 5 9.0 % (P<0 .0 1) ;3 RDI和缺血性 ST- T改变联合 (系列 )实验的灵敏度为 6 4.4% ,特异度为 83.2 % ,准确度为 72 .7% .结论 :RDI诊断CHD灵敏度与缺血性 ST- T改变接近 ,但特异度高 .

Aim Comparison studying the diagnostic value of coronary heart disease between repolarization dispersion index and ischemic ST T change. Methods:Coronary arteriography(CAG) regarded as the standard of diagnostic CHD. 227 cases with suspected CHD was studied. And assessment index of validity was calculated by contingency table. Results:①As RDI is located at 0.40, Youden′s index (YI) equals 0.49. Because of it highest, YI=0.40 is as boundary value. ② Sensitivity and specificity and accuracy for observation of RDI and ischemic ST T change was 66.7% vs 68.3%( P >0.05),82.2% vs 47.5%( P <0.01) and 73.6% vs 59.0%( P <0.01) respectively. ③ Sensitivity and specificity and accuarcy for observation of RDI with ischemic ST T change was 64.4%,83.2% and 72.7% respectively. Conclusion:RDI is similar to ischemic ST T change on sensitivity of diagnostic CHD. But specificity of RDI is high. Their combination can decrease mistake diagnostic rate.