Survival according to percentage change in PVR (acute vasoreactivity) on acute iloprost challenge (see fig 4 and text)
| PVR change (ΔPVR) | Mean ΔPVR (%) | 1 Year survival (%) | 2 Year survival (%) | 3 Year survival (%) |
|---|---|---|---|---|
| 20–34% (n=50) | 32 | 79 | 52 | 44 |
| ⩾35% (n=39) | 40 | 78 | 65 | 63 |
| <20% (n=40) | 13.5 | 77 | 67 | 62 |