| BMI | Body mass index |
| BP | Blood pressure |
| BPA | Balloon pulmonary angioplasty |
| BSA | Body surface area |
| CI | Cardiac index |
| CO | Cardiac output |
| CTEPH | Chronic thromboembolic pulmonary hypertension |
| ERS | European Respiratory Society |
| ESC | European Society of Cardiology |
| FiO2 | Fraction of inspired oxygen |
| Hb | Hemoglobin |
| HR | Heart rate |
| mPAP | Mean pulmonary artery pressure |
| NT-proBNP | N-terminal prohormone of brain natriuretic peptide |
| PAH | Pulmonary arterial hypertension |
| PAWP | Pulmonary artery wedge pressure |
| PEA | Pulmonary endarterectomy |
| PH | Pulmonary hypertension |
| PVR | Pulmonary vascular resistance |
| Qs/Qt | Fraction of right-to-left shunt |
| RHC | Right heart catheterization |
| WHO | World Health Organization |
| WU | Wood unit |
| 6MWD | 6 min walking distance |
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