Table 2. Changes in the parameters of RHC at admission and those after 2 years of treatment.
| RHC parameters | Before treatment | After treatment |
|---|---|---|
| RAP (systolic/diastolic/mean, mmHg) | 27/22/24 | 11/8/9 |
| RVP (systolic/diastolic/mean, mmHg) | 127/12/27 | 1984/5/12 |
| PAP (systolic/diastolic/mean, mmHg) | 135/73/93 | 89/43/61 |
| PCWP (mmHg) | 28 | 14 |
| Diastolic pressure gradient (mmHg) | 45 | – |
| Transpulmonary pressure gradient (mmHg) | 65 | 47 |
| Cardiac output§ (L/min) | 2.84 | 3.1 |
| PVR (Wood units) | 22.89 | 8.15 |
| Pulmonary arterial vasoreactivity | – | Negative |
The second RHC shows elevated PAP with improved PCWP, and it confirms the diagnosis of idiopathic pulmonary arterial hypertension (IPAH) (right column). §, cardiac output was measured using the indirect Fick method. PAP, pulmonary arterial pressure; PCWP, pulmonary capillary wedge pressure; PVR, pulmonary vascular resistance; RAP, right atrial pressure; RVP, right ventricular pressure; RHC, right heart catheterization.