Table 2. Hemodynamic characteristics.

Parameter	Sch-PAH	IPAH	p value
Mean pulmonary artery pressure, mmHg	57.5±18.5	63.8±17.1	0.47
Pulmonary capillary wedge pressure, mmHg	12.6±2.8	9.9±3.3	0.10
Right atrial pressure, mmHg	11.9±5	9.7±2	0.26
Pulmonary vascular resistance, IU	12.3±5.6	14.8±8.1	0.46
Cardiac output, L/min	4.00±0.6	4.09±1.2	0.84
Cardiac index, L/min/m2	2.37±0.5	2.49±0.7	0.69
Acute vasodilator response, n	0	0