| Cause of PH | No. | Mean mPAP (mm Hg) | Mean CO (l/min) | Mean PVR(Wood units) | Mean saturation drop in 6MWD | Mean saturation drop in HC | p Value |
| IPAH, CTD & post-PEA | 17 | 42.7(from 7 of 17) | 3.7(7 of 17) | 8.9(7 of 17) | 10.1% (±7.5%) | 6.2% (±2.7%) | 0.02 |
| Distal CTEPH | 5 | 46.6(from 5 of 5) | 4.2(5 of 5) | 9.2(5 of 5) | 5.8% (±2.2%) | 9.8% (±1.9%) | 0.007 |
| Total | 22 | 44.0(from 12 of 22) | 3.9(12 of 22) | 9.0(12 of 22) | 7.0% (±2.9%) | 9.2% (±6.9%) | 0.08 |