Table 2.

Clinical characteristics during follow-up.

		At Baseline	At First BPA	At Last BPA
Clinical characteristics	WHO FC III/IV	52 (59.8%)	47 (54.0%)	15 (17.2%)
	6MWD (m)	380 ± 142	396 ± 122	442 ± 126
	Log NTproBNP (pg/mL)	5.9 ± 1.8	5.6 ± 1.5	5.1 ± 1.2
Pulmonary hemodynamics	mRAP (mmHg)	8.8 ± 5.6	7.1 ± 4.7	7.6 ± 4.1
	mPAP (mmHg)	38.9 ± 10.0	33.1 ± 11.0	29.2 ± 9.6
	PAWP (mmHg)	10.7 ± 5.0	11.8 ± 5.3	13.5 ± 5.8
	CO (L/Min)	5.2 ± 1.9	5.7 ± 1.6	6.0 ± 1.2
	PVR (WU)	6.4 ± 3.6	3.7 ± 2.3	2.7 ± 1.6

BPA = Balloon Pulmonary Angioplasty; CO = Cardiac Output; mPAP = Mean Pulmonary Arterial Pressure; mRAP = Mean Right Atrial Pressure; NTproBNP = N-terminal Fragment of Pro-Brain Natriuretic Peptide; PAWP = Pulmonary Arterial Wedge Pressure; PVR = Pulmonary Vascular Resistance; WHO FC = World Health Organization Functional Class; 6MWD = 6-Minute Walking Distance
Note: Data are given as mean ± standard deviation or n (%).