Overview Efficacy of Type-5 Phosphodiesterase Inhibitors in Primary and Secondary Pulmonary Hypertension Status: Withdrawn Trial end date: 2005-05-01 Target enrollment: Participant gender: Summary The aim of this trial is to evaluate the efficacy of type-5 phosphodiesterase inhibitors (sildenafil) in primary and secondary pulmonary hypertension Phase: N/A Details Lead Sponsor: National Taiwan University HospitalTreatments: Phosphodiesterase InhibitorsSildenafil Citrate