Pulmonary Arterial Hypertension - 47 Studies Found Completed : Pilot Chart Review Study Of Sitaxentan Sodium (Thelin) In Patients With Pulmonary Arterial Hypertension (PAH) : Pulmonary Arterial Hypertension : 2011-09-30 : Drug: Sitaxentan sodium Sitaxentan sodium 100 mg / day Completed : Evaluate The Clinical Effectiveness, Safety And Tolerability Of Sildenafil Used In Doses ≥20mg TID For The Treatment Of Pulmonary Arterial Hypertension : Pulmonary Arterial Hypertension : 2011-06-01 : Drug: sildenafil citrate Sildenafil citrate, 20mg oral tablets, taken at least three times daily Active, not recruiting : Clinical Study of Macitentan in Patients With Pulmonary Arterial Hypertension to Psychometrically Validate the PAH-SYMPACT Instrument : Pulmonary Arterial Hypertension : 2013-03-27 : Drug: Macitentan Macitentan tablet, dose of 10 mg, once daily Terminated : Extension to CQTI571A2102 to Evaluate Long-term Safety, Tolerability and Efficacy of Imatinib in Severe Pulmonary Arterial Hypertension (PAH) : Pulmonary Arterial Hypertension : 2011-07-11 : Drug: Imatinib 200 mg or 400 mg qd Active, not recruiting : Clinical Study to Assess the Long-term Safety and Tolerability of ACT 064992 in Patients With Symptomatic Pulmonary Arterial Hypertension : Pulmonary Arterial Hypertension : 2008-04-24 : Drug: Macitentan Tablet, oral administration, 10 mg dose once daily