Characteristics of idiopathic pulmonary arterial hypertension (iPAH) patients and controls
| iPAH | Controls | |
| Patients | 10 | 10 |
| Age years | 54.9±3.1 | 41.9±2.1 |
| Sex male/female (ratio) | 3/7 (0.43) | 4/6 (0.67) |
| NYHA functional class | ||
| Class I | 2 | NA |
| Class II | 5 | NA |
| Class III | 3 | NA |
| 6MWD m | 465±20 | NA |
| Mean PAP mmHg | 48.8±3.5 | NA |
| Cardiac index Lmin−1·m−2 | 2.9±0.2 | NA |
| PVRI Wood unit·m−2 | 8.3±0.9 | NA |
| PCWP mmHg | 8.4±0.7 | NA |
| Specific PAH therapy | ||
| ERA | 8 | NA |
| PDE5i | 6 | NA |
| Prostanoids | 2 | NA |
| No treatment | 0 | NA |
Data are presented as n or mean±sem, unless otherwise stated. NYHA: New York Heart Association; 6MWD: 6-min walking distance; PAP: pulmonary arterial pressure; PVRI: pulmonary vascular resistance index; PCWP: pulmonary capillary wedge pressure; ERA: endothelin receptor antagonists; PDE5i: phophodiesterase 5 inhibitors; NA: not applicable.