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. 2012 Sep;21(125):259–262. doi: 10.1183/09059180.00003612

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Figure 1. — An expert proposal for a treat-to-target checklist for pulmonary arterial hypertension (PAH). IPAH: idiopathic PAH; HPAH: heritable PAH; SSc: systemic sclerosis; CTD: connective tissue disease; NYHA: New York Heart Association; WHO: World Health Organization; FC: functional class; S_pO₂: arterial oxygen saturation measured by pulse oximetry; SR: sinus rhythm; 6-MWD: 6-min walk distance; CPET: cardiopulmonary exercise testing; TAPSE: tricuspid annular plane systolic excursion; RHC: right heart catheterisation; PVR: pulmonary vascular resistance; S_vO₂: mixed venous oxygen saturation; S_aO₂: arterial oxygen saturation; RAP: right atrial pressure; BNP: brain natriuretic peptide; NT-proBNP: N-terminal pro-BNP; ULN: upper limit of normal.