Table 3 Linear correlation of RV-PA coupling-unit parameters
| CMR-derived variables | Pearson correlation-coefficient | p-value |
|---|---|---|
| MvPA – PVR (WU) | −0.785 | < 0.001 |
| MvPA- Emax/Ea | −0.205 | 0.003 |
| MvPA – PA pulsatility (%) | + 0.351 | < 0.001 |
| MvPA – RVEF (%) | + 0.290 | < 0.001 |
| Echocardiographic variables | Pearson correlation-coefficient | p-value |
| mvPA – TAPSE (mm) | + 0.116 | 0.211 |
| mvPA – TAPSE/PAPs ratio (mm/mmHg) | + 0.161 | 0.133 |
| RHC variables | Pearson correlation-coefficient | p-value |
| PA compliance (ml/mmHg) | + 0.455 | 0.008 |
| Pulse pressure (mmHg) | −0.433 | 0.004 |
CMR cardiovascular magnetic resonance. Ea effective elastance. Emax right ventricular maximal end-systolic elastance. mvPA mean velocity at the pulmonary artery. PA pulmonary artery. PVR pulmonary vascular resistance. RHC right heart catheterisation. RVEF right ventricular ejection fraction. TAPSE tricuspid annular plane excursion. WU wood units