Table 2.
Diagnostic evaluation
| Variable | No. (%) | Mean ± SD | |
|---|---|---|---|
| Echocardiography | |||
| TR velocity, m/sec | 128 (95.5) | 4.0 ± 0.8 | |
| Systolic PAP, mmHg | 128 (95.5) | 74.7 ± 25.0 | |
| Cardiac catheterization | |||
| Mean PAP, mmHg | 16 (12) | 39.6 ± 18.6 | |
| RVSP, mmHg | 9 (6.7) | 70.2 ± 25.4 | |
| Perfusion scan | |||
| Normal | 8 (6) | ||
| Diffuse patch pattern | 30 (22.4) | ||
| ≥ 1 Segmental perfusion defects | 68 (50.7) | ||
| Ventilation scan | |||
| Normal | 37 (27.6) | ||
| Abnormal | 17 (12.7) | ||
| Pulmonary function test | |||
| FVC | 70 (52.2) | 3.03 ± 0.97 | (86.6% ± 17.5% predicted) |
| FEV1 | 70 (52.2) | 2.26 ± 0.81 | (84.6% ± 21.3% predicted) |
| FEV1/FVC | 70 (52.2) | 74.5 ± 13.1 | |
| DLCO | 43 (32.1) | 75.1 ± 21.1 | |
| 6-Minute walk test | 27 (20.1) | 397.6 ± 78.8 | |
TR, tricuspid valve regurgitation; PAP, pulmonary arterial pressure; RVSP, right ventricular systolic pressure; FVC, forced vital capacity; FEV1 forced expiratory volume in 1 second; DLCO, diffuse capacity for carbon monoxid.