Table 3.

Hemodynamic definition of PH

Definition	Characteristic	Clinical PH group
Pre-capillary PH	mPAP ≥25 mm Hg	1, 3, 4, 5
	PAWP ≤15 mm Hg
Post-capillary PH	mPAP ≥25 mm Hg	2, 5
	PAWP >15 mm Hg
Isolated post-capillary PH	+
	DPG* <7 mm Hg and/or PVR ≤3 WU†
Combined post-capillary and pre-capillary PH (Cpc-PH)	+
	DPG ≥7 mm Hg and/or PVR >3 WU

Modified from Galie N et al. Eur Heart J 2016;37:67–119, with permission from Oxford University Press [1].

^*DPG=diastolic PAP–mean PAWP.

^†WU are preferred to dynes·s/cm⁵, and 1 WU is about 80 dynes·s/cm⁵.

PH: pulmonary hypertension; mPAP: mean pulmonary artery pressure; PAWP: pulmonary artery wedge pressure; DPG: diastolic pressure gradient; PVR: pulmonary vascular resistance; WU: Wood units.