- Symptomatic pulmonary arterial hypertension, World Health Organization Group 1 with a pulmonary vascular resistance (PVR) >300 dyn*sec*cm-5, mean pulmonary artery pressure (PAP mean) ≥25 mmHg, and pulmonary capillary wedge pressure (PCWP) ≤15 mmHg as assessed by right heart catheterization within 6 months prior to Screening (Visit 0)