6MWD	6 min walk test distance
6MWT	6 min walk test
AA	ascending aorta
CMR	cardiac MRI
CT	computed tomography
CTEPH	chronic thromboembolic pulmonary hypertension
DECT	dual-energy CT
DLCO	lung diffusing capacity for carbon monoxide
ERA	endothelin receptor antagonist
ESC/ERS	European Society of Cardiology/European Respiratory Society
FEV1	forced expiratory volume in 1 s
FVC	forced vital capacity
ILD	interstitial lung disease
LTx	lung transplantation
LV	left ventricle
MRI	magnetic resonance imaging
NYHA	New York Health Organization
OSAS	obstructive sleep apnea syndrome
PA	pulmonary arteries
PAH	pulmonary arterial hypertension
PAWP	pulmonary artery wedge pressure
PDE-5i	phosphodiesterase-5 inhibitors
PFT	pulmonary function testing
PH	pulmonary hypertension
PVR	pulmonary vascular resistance
QOL	quality of life
RHC	right heart catheterization
RPCT	randomized placebo-controlled trial
RVSP	right ventricular systolic pressure
SAPH	sarcoidosis-associated pulmonary hypertension
TRV	tricuspid regurgitant velocity
TTE	transthoracic echocardiography
V/Q	ventilation/perfusion
WASOG	World Association of Sarcoidosis and other Granulomatosis
WHO	World Health Organization
WU	Wood’s units