Overview The Efficacy and Safety of Vardenafil in the Treatment of Pulmonary Arterial Hypertension Status: Completed Trial end date: 2010-02-01 Target enrollment: Participant gender: Summary The purpose of this study is to evaluate the efficacy and safety of vardenafil in the treatment of pulmonary arterial hypertension. Phase: Phase 3 Details Lead Sponsor: Tongji UniversityTreatments: Vardenafil Dihydrochloride