Table 3.
Flow parameters in the right main pulmonary artery.
| Parameter | Normal (n = 78) | Borderline PH (n = 12) | PH (n = 7) | p-value |
|---|---|---|---|---|
| Flow rate (ml/min) | 1542.5 ± 654.5 | 1278.0 ± 329.7 | 948.9 ± 480.1 | 0.019* |
| Forward (L/min) | 1.76 ± 0.67 | 1.46 ± 0.33 | 1.29 ± 0.44 | 0.049* |
| Backward (L/min) | −0.23 ± 0.17 | −0.18 ± 0.13 | −0.34 ± 0.21 | 0.140 |
| Output (ml) | 20.6 ± 9.7 | 20.9 ± 7.5 | 9.1 ± 2.7 | 0.001* |
| Regurgitation (ml) | 0.77 ± 0.90 | 0.79 ± 0.67 | 2.05 ± 2.61 | 0.602 |
| Regurgitation (%) | 4.85 ± 8.66 | 3.59 ± 2.37 | 14.7 ± 16.1 | 0.212 |
| WSS (Pa) | 0.19 ± 0.15 | 0.13 ± 0.06 | 0.06 ± 0.03 | 0.002* |
| Area (cm2) | 0.29 ± 0.11 | 0.33 ± 0.13 | 0.40 ± 0.09 | 0.046* |
| Kinetic energy (mW) | 2.33 ± 2.64 | 0.94 ± 0.72 | 0.39 ± 0.26 | <0.001* |
| Ave through velocity (m/s) | 0.10 ± 0.06 | 0.07 ± 0.03 | 0.07 ± 0.07 | 0.002* |
Data expressed as n or mean ± standard deviation (range). PH, pulmonary hypertension; WSS, wall shear stress; Ave, average.