This application is intended as a softwarel version of the prognostic calculator developed by Dr Raymond L Benza, coauthors, and steering committee members. It provides the relative risk of mortality in diagnosed pulmonary arterial hypertension (PAH) patients at 1 year. It was formulated and validated with data from the REVEAL Registry®. This calculator evaluates 19 parameters to help you individualize and optimize therapeutic strategies in patients with PAH.