RecruitingPhase 2Drug trialRepurposing Valsartan May Protect Against Pulmonary HypertensionThis is a Phase 2, single-center, randomized placebo controlled trial of valsartan (an angiotensin receptor blocker) in adults with pulmonary arterial hypertension. The study will evaluate the safety and clinical efficacy of a 24-week course of valsartan.