Overview The Role of Endothelin in Pulmonary Hypertension Status: Completed Trial end date: 2011-06-01 Target enrollment: Participant gender: Summary The purpose of the study is is to determine the effect, on the lung circulation, of BQ-123, an investigational compound which is not approved by the FDA. Phase: Phase 2 Details Lead Sponsor: Brigham and Women's HospitalTreatments: cyclo(Trp-Asp-Pro-Val-Leu)