No PH | Pre-capillary PH | Isolated post-capillary PH | Combined pre-capillary and post-capillary PH | |
Mean pulmonary artery pressure | <25 mm Hg | >25 mm Hg | ≥25 mm Hg | >25 mm Hg |
Pulmonary capillary wedge pressure | <15 mm Hg | <15 mm Hg | ≥15 mm Hg | ≥15 mm Hg |
Pulmonary vascular resistance | <3 WU | ≥3 WU | <3 WU | >3WU |
PH, pulmonary hypertension; WU, Woods Units.