心气虚证的计量诊断初探

Quantitative Diagnosis in Heart-qi Deficiency Syndrome

本文利用无创性心功能检测的有关参数,结合多元分析方法与电子计算机技术,对心气虚证的计量诊断进行了初步探索,用Fisher判别分析法建立了心气虚证诊断的判别函数。所选判别指标为:X_1:射血前期与左室射血时间比值(PEP/LVET),X_2:心脏收缩力指数(HI),X_3:每分心输出量(CO)。得出判别心气虚证与正常人的判别[1]式为:Z=11.16X_1-0.29X_2-0.0019X_3,判别心气虚证与非心虚证的判别[2]式为:Z=13.3X_1-0.15X_2-0.0011X_3。其中判别[1]式的判别符合率、敏感度、特异度分别是90％、86.16％、93％,判别[2]式的判别符合率、敏感度、特异度分别是85％、86.6％、83％。具有较为满意的判别效果。

Some parameters in non-invasive cardiac functional examination were used as the quantitative diagnosis for heart-qi deficiency syndrome by means of multivariate analysis and computer technology. The fisher discriminatory analysis was used to establish the discriminatory function for the diagnosis of heart-qi deficiency. The chosen discriminatory indicatrixes were X_1: Pre-ejection period/left ventricular ejection time (PEP/LVET), X_2: Heather index(HI) and X_3: cardiac output (CO). Two discriminants were obtained. Discriminant [1] was Z=11.16X_1-0.29X_2-0.0019X_3, which was used to discriminate heart-qi deficiency from normal subjects; Discriminant [2] was Z=13.3X_1-0.15X_2-0.0011X_3, which was used to discriminate heart-qi deficiency from non-deficiency of heart-qi. The discriminatory accuracy, sensitivity and specificity in discriminant [1] were 90,％ 86.6％ and 93％ respectively and those in discriminant [2] were 85％, 86.6％ and 83％ respectively, which indicates a satisfactory discriminatory effect.