Noninvasive quantitative diagnosis of pulmonary artery hypertension with impedance rheopneumogram in patients with chronic obstructive pulmonary disease

Abstract

In order to evaluate the value of impedance rheopneumogram (IRP) in predicting pulmonary arterial pressure (PAP) and pulmonary arterial hypertension (PAH) noninvasively and quantitatively, 150 patients with chronic obstructive pulmonary disease (COPD) were examined by IRP and right heart catheterization simultaneously. It was found that some parameters derived from IRP correlated well with PAP, the strongest correlation being demonstrated by Q-B/B-Y ratio (γ = 0.74,P<0.001) and Hs (γ = −0.56,P<0.001). We made a multi-stepwise regressional analysis and, obtained an equation to predict PAP from IRP parameters: PAP (kPa) = [−2.26−5.05xlnHs+27.02 × (Q-B/B-Y)] × 0.133 (γ = 0.78,P<0.001) Other 30 COPD patients were selected to assess the effectiveness of the equation, We found that the sensitivity and specificity of the equation in identifying PAH were 83% and 93% respectively.

Keywords

chronic obstructive pulmonary disease / impedance rheopneumogram / pulmonary artery hypertension / pulmonary circulation hemodynamics / diagnosis noninvasively and quantitatively

References

[1] LaabanJ P, DieboldB, ZelinskiR, et al. . Noninvasive estimation of systolic pulmonary artery pressure using Doppler echocardiography in patients with COPD. Chest, 1989, 961258-1258

[2] MarchandiseB, DeBruyne B, DelannoisL, et al. . Noninvasive prediction of pulmonary hypertension in chronic obstructive pulmonary disease by echocardiography. Chest, 1987, 91361-361