Table 3.
Correlation between RV function, PA Stiffness Parameters and Pulmonary Pressures/Resistancein Patients with COPD.
| Variables | Mean PAP | Systolic PAP | PVR index |
|---|---|---|---|
| RV EDV index, mL/m2 | −0.086 | −0.089 | 0.189 |
| RV ESV index, mL/m2 | 0.504* | 0.517* | 0.548* |
| RV ejection fraction, % | −0.653* | −0.670* | −0.691 |
| RV mass index, g/m2 | 0.705* | 0.703* | 0.458 |
| RA area, cm2/m2 | 0.373 | 0.387 | 0.196 |
| RV/LV mass ratio | 0.569* | 0.554* | 0.432 |
| Maximal PA area, cm2 | 0.502* | 0.592* | 0.396 |
| Minimal PA area, cm2 | 0.522* | 0.608* | 0.359 |
| PA:AA diameter ratio | 0.476* | 0.452* | 0.707* |
| PA elasticity, % | −0.328 | −0.362 | −0.480 |
| PA distensibility, %/mmHg | −0.593* | −0.614* | −0.382 |
| PA compliance, mm2/mmHg | −0.695* | −0.721* | −0.405 |
| PA elastic modulus, mmHg | 0.768* | 0.787* | 0.501* |
| PA stiffness index beta | 0.315 | 0.351 | −0.338 |
| PA capacitance, mm3/mmHg | −0.714* | −0.756* | −0.746* |
| PWV, m/s | 0.935* | 0.934* | 0.698* |
Abbreviations: AA, ascending aorta; COPD, chronic obstructive pulmonary disease; LV, left ventricle; RA, right atrium; RV, right ventricle; RVEDV, right ventricular end-diastolic volume; RVESV, right ventricular end-systolic volume; PA, pulmonary artery; PAP, pulmonary artery pressure; PVR, pulmonary vascular resistance; PWV, pulse wave velocity; IQR, interquartile range; SD, standard deviation.
*Statistical significance: p < 0.0001.