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78例病人接受冠脉造影和次极量平板运动试验,探讨Q-Tc、Q-Tr和△Q-Tc预测冠脉病变的准确性。Q-Tc与Q-Tr的敏感度,特异度,阳性预测值及诊断准确率分别为84,76,83,81％与69,88,89,77％,与ST段降低的相比无明显差别,提示其诊断价值相似。与心血管造影资料对照,上述指标能反映冠脉病变的程度。△Q-Tc的敏感度低(58％)而特异性高(94％),其诊断准确性(73％)与其他指标相比无显著差异,故有应用价值。
78 patients underwent coronary angiography and submaximal treadmill exercise test to investigate the accuracy of Q-Tc, Q-Tr and △ Q-Tc prediction of coronary lesions. The sensitivity, specificity, positive predictive value and diagnostic accuracy of Q-Tc and Q-Tr were 84,76,83,81% and 69,88,89,77% respectively, which were not significantly different from those of ST-segment depression Difference, suggesting that its diagnostic value is similar. Contrast with the data of cardiovascular angiography, the above indexes can reflect the extent of coronary lesion. △ Q-Tc has low sensitivity (58%) and high specificity (94%), diagnostic accuracy (73%) compared with other indicators no significant difference, it has application value.