Table 4.
Correlations between mPAP obtained in the right heart catheterization with tomographic, functional, and echocardiographic variables.
| Variable | r | P |
| PA-Ao ratio | 0.788 | <.0001 |
| PA (mm) | 0.666 | <.0001 |
| DLCO (% predicted) | −0.023 | .89 |
| FEV1 (% predicted) | −0.203 | .25 |
| FEV1/FVC | 0.122 | .49 |
| RV/TLC | 0.084 | .63 |
| SpO2 at rest (%) | −0.248 | .16 |
| Distance in the 6MWT (m) | 0.075 | .68 |
| Distance in the 6MWT (% predicted) | 0.254 | .16 |
| Oxygen desaturation during 6MWT (%) | 0.453 | .009 |
| sPAP (mm Hg)∗ | 0.675 | <.0001 |
| TRV (m/s)† | 0.459 | .03 |
6MWT = six-minute walk test, Ao = ascending aorta, DLCO = lung diffusing capacity for carbon monoxide, FEV1 = forced expiratory volume in the first second, FVC = forced vital capacity, mPAP = mean pulmonary arterial pressure, PA = pulmonary artery, RV = residual volume, sPAP = systolic pulmonary artery pressure, SpO2 = oxygen saturation, TLC = total lung capacity, TRV = tricuspid regurgitation velocity.
∗
n = 24.
†
n = 22.