6MWD	Six-minute walking distance
BPA	Balloon pulmonary angioplasty
BMPR2	Bone morphogenetic protein receptor type 2
BNP	Brain natriuretic peptide
CCBs	Calcium channel blockers
CPET	Cardiopulmonary Exercise Testing
ppm	Cases per million
CLD	Chronic lung disease
COPD	Chronic obstructive pulmonary disease
CTEPH	Chronic thromboembolic pulmonary hypertension
CPFE	Combined pulmonary fibrosis and emphysema
CHD	Congenital heart disease
CPAP	Continuous positive airway pressure
DECT	Dual-energy computed tomography
ERAs	Endothelin receptor antagonists
ESC	European Society of Cardiology
HF	Heart failure
HFmrEF	Heart failure with mildly reduced ejection fraction
HFpEF	Heart failure with preserved ejection fraction
HFrEF	Heart failure with reduced ejection fraction
HPAH	Heritable PAH
IPAH	Idiopathic PAH
IPF	Idiopathic pulmonary fibrosis
IL-6	Interleukin-6
ILD	Interstitial lung disease
LHD	Left heart disease
mPAP	Mean pulmonary arterial pressure
NO	Nitric oxide
PDE5i	Phosphodiesterase type 5 inhibitor
PDGF	Platelet-derived growth factor
PAs	Prostacyclin analogs
PRAs	Prostacyclin receptor agonists
PAH	Pulmonary arterial hypertension
PAWP	Pulmonary artery wedge pressure
PEA	Pulmonary endarterectomy
PH	Pulmonary hypertension
PPHN	Pulmonary hypertension of the newborn
PVR	Pulmonary vascular resistance
PVOD	Pulmonary veno-occlusive disease
RHC	Right heart catheterization
sGCS	Soluble guanylate cyclase stimulator
TGF-β	Transforming growth factor-beta
V/Q	Ventilation/perfusion
WU	Wood Units
WHO	World Health Organization
WSPH	World Symposium on Pulmonary Hypertension