Table I.

Clinical features of the patients.

Patient ID	Age, year	Sex	PaO2, mm Hg	PaCO2, mm Hg	Ppa, mm Hg	CI, L/min/m2	PVR, dyne × s/cm 5
001	43	F	72	38.9	40	3.65	590
002	65	M	55	39.5	43	3.11	510
003	61	F	58	34.6	57	2.89	879
004	54	M	63	37.6	42	3.78	654
005	37	F	78	39.8	51	4.03	397
006	46	F	64	33.6	63	3.87	898

CI, cardiac index; Ppa, mean pulmonary artery pressure; PVR, pulmonary vascular resistance; PaO₂, partial pressure of oxygen; PaCO₂, partial pressure of carbon dioxide.