Overview ARIES - Ambrisentan in Patients With Moderate to Severe Pulmonary Arterial Hypertension (PAH) Status: Completed Trial end date: 2006-02-01 Target enrollment: Participant gender: Summary The primary objective is to determine the effect of ambrisentan on exercise capacity in subjects with PAH. Phase: Phase 3 Details Lead Sponsor: Gilead SciencesTreatments: Ambrisentan