【摘要】 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:X₁:射血前期与左室射血时间比值（PEP/LVET）,X₂:心脏收缩力指数（HI）,X₃: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=11.16X₁-0.29X₂-0.0019X₃,判别心气虚证与非心虚证的判别[2]式为:Z=13.3X₁-0.15X₂-0.0011X₃。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。更多还原

【Abstract】 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 X₁: Pre-ejection period/left ventricular ejection time （PEP/LVET）, X₂: Heather index（HI） and X₃: cardiac output （CO）. Two discriminants were obtained. Discriminant [1] was Z=11.16X₁-0.29X₂-0.0019X₃, which was used to discriminate heart-qi deficiency from normal subjects; Discriminant [2] was Z=13.3X₁-0.15X₂-0.0011X₃, 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.更多还原