Imaging Findings
| Parameter | Mean ± SD | Range |
| Estimated pulmonary artery systolic pressure (mm Hg) | 42 ± 16 | 20–79 |
| Right ventricular thickness (mm) | 4.9 ± 1.1 | 2.5–7.3 |
| Ejection fraction by echocardiography (%) | 48 ± 19 | 10–75 |
| Ejection fraction by SPECT (%) | 55 ± 20 | 11–84 |
| RV/LV uptake ratio (non–attenuation-corrected) | 0.36 ± 0.1 | 0.22–0.74 |
| RV/LV uptake ratio (attenuation-corrected) | 0.47 ± 0.1 | 0.3–0.77 |