- RHC measurements on Study Day 1: 1) mean pulmonary artery pressure (MPAP) ≥25 mmHg; 2) pulmonary artery occlusion pressure (PAOP) ≥18 mmHg and ≤30 mmHg; 3) pulmonary artery diastolic pressure (PADP) - PAOP ≤10 mmHg