Haemodynamic definitions of PH
| Definition | Characteristics |
| Pre-capillary PH | mPAP >20 mmHg PAWP ≤15 mmHg PVR ≥3 WU |
| Isolated post-capillary PH | mPAP >20 mmHg PAWP >15 mmHg PVR <3 WU |
| Combined pre- and post-capillary PH | mPAP >20 mmHg PAWP >15 mmHg PVR ≥3 WU |
mPAP: mean pulmonary arterial pressure; PAWP: pulmonary arterial wedge pressure; PVR: pulmonary vascular resistance; WU: Wood units. Reproduced from [1], with permission from the publisher.