Seventh World Symposium on Pulmonary Hypertension (WSPH): Risk stratification

6MWD: six-minute walk distance; CTD: connective tissue disease; DT: drug and toxin; ERA: endothelin-1 receptor antagonist; FC: functional class; HPAH: hereditary PAH; IPAH: idiopathic PAH; mPAP: mean pulmonary artery pressure; RV: right ventricle; Rx: prescription; PAH: pulmonary arterial hypertension; PDE-5i: phosphodiesterase-5 inhibitor; PPA: prostacyclin pathway agent; PVR: pulmonary vascular resistance; sGCS: soluble guanylyl cyclase stimulator.