Table 2.
Pulmonary artery dimensions and blood flow parameters in patients with PAH and healthy volunteers
| Healthy volunteers | PAH patients | p value | |
|---|---|---|---|
| Diameter (mm) | |||
| MPA | 13.0 ± 1.0 | 15.6 ± 2.5 | 0.038 |
| RPA | 8.0 ± 0.7 | 11.7 ± 1.7 | 0.001 |
| LPA | 9.1 ± 0.8 | 13.8 ± 7.6 | 0.097 |
| Area (mm2) | |||
| MPA | 537.6 ± 94.2 | 780.0 ± 272.2 | 0.058 |
| RPA | 233.7 ± 36.3 | 435.8 ± 132.2 | 0.003 |
| LPA | 262.3 ± 47.0 | 753.3 ± 897.8 | 0.209 |
| Maximum blood flow velocity (m/sec) | |||
| MPA | 0.41 ± 0.10 | 0.28 ± 0.09 | 0.019 |
| RPA | 0.41 ± 0.15 | 0.22 ± 0.07 | 0.006 |
| LPA | 0.32 ± 0.10 | 0.18 ± 0.07 | 0.010 |
| Mean blood flow velocity (m/sec) | |||
| MPA | 0.10 ± 0.02 | 0.07 ± 0.02 | 0.011 |
| RPA | 0.11 ± 0.04 | 0.06 ± 0.02 | 0.007 |
| LPA | 0.09 ± 0.02 | 0.06 ± 0.05 | 0.249 |
| Maximum blood flow volume (L/min) | |||
| MPA | 13.54 ± 2.83 | 12.74 ± 3.49 | 0.650 |
| RPA | 5.87 ± 1.08 | 5.96 ± 1.05 | 0.874 |
| LPA | 5.10 ± 1.50 | 4.85 ± 2.83 | 0.911 |
| Mean blood flow volume (L/min) | |||
| MPA | 3.14 ± 0.77 | 2.78 ± 0.34 | 0.240 |
| RPA | 1.53 ± 0.29 | 1.65 ± 0.55 | 0.618 |
| LPA | 1.38 ± 0.38 | 1.41 ± 0.62 | 0.909 |
| Stroke volume (mL) | |||
| MPA | 62.5 ± 15.6 | 54.9 ± 7.3 | 0.219 |
| RPA | 30.5 ± 5.8 | 32.7 ± 10.6 | 0.667 |
| LPA | 27.4 ± 7.5 | 27.7 ± 12.0 | 0.945 |
Data are expressed as mean ± standard deviation
PAH pulmonary arterial hypertension, MPA main pulmonary artery, RPA right pulmonary artery, LPA left pulmonary artery