From: Long-term survival of patients with pulmonary arterial hypertension recovering to World Health Organization functional class I or II: a historical comparison between intravenous epoprostenol and oral agents
Treatment
Number (%) of patients
All
Group 1
Group 2
Group 3
Group 4
Epoprostenol*
22 (54)
13 (32)
9 (22)
0 (0)
ERA†
1 (2)
4 (10)
PDE5I
14 (34)
3 (7)
6 (15)
Beraprost
2 (4)