Long-term Follow-up After Conversion from Intravenous Epoprostenol to Oral Therapy With Bosentan or Sildenafil in 13 Patients With Pulmonary Arterial Hypertension

Weaning from epoprostenol to sildenafil or bosentan with sustained clinical improvement is possible, even with persistent pulmonary hypertension; however, patients with persistently abnormal hemodynamics are at risk for hemodynamic and clinical deterioration and require close follow-up.