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

PAH: pulmonary arterial hypertension; IPAH: idiopathic pulmonary arterial hypertension; HPAH: heritable pulmonary arterial hypertension; DPAH: drug-induced pulmonary arterial hypertension; CCB: calcium channel blocker; IV: intravenous; PCA: prostacyclin analogue; PH: pulmonary hypertension.