Table 2.

Comparison of patients treated with oxygen alone versus oxygen and inhaled nitric oxide

	Oxygen alone		Oxygen + iNO
	Baseline	After 3 months	Baseline	After 3 months	p value
mPAP (mm Hg)	24 ± 5	25 ± 6	27 ± 4	20 ± 5	<0.001
PVR (dyn × s/cm5)	259 ± 101	264 ± 109	276 ± 96	173 ± 87	0.001
CO (l/min)	5.5 ± 1.3	5.3 ± 1.3	5.6 ± 1.3	6.1 ± 1.0	0.025
VO2 (ml/min)	883 ± 303	842 ± 232	896 ± 406	1005 ± 326	NS

Adapted from Chaouat et al (2001).

Abbreviations: mPAP, mean pulmonary artery pressure; PVR, pulmonary vascular resistance; CO, cardiac output; VO₂, oxygen consumption.