Parenteral Treprostinil as an Effective Bridge to Lung Transplant in Patients with Severe Pulmonary Hypertension Associated with Interstitial Lung Disease.

Pulmonary hypertension associated with interstitial lung disease (PH-ILD) is associated with substantial morbidity and mortality. Lung transplantation remains the definitive therapy for selected patients; however, severe pulmonary vascular dysfunction and hemodynamic instability may complicate transplant candidacy and pre-transplant management. The role of parenteral prostacyclin therapy as a bridge to transplantation in this population remains poorly defined. The primary objective of this retrospective case series was to evaluate the utility of parenteral treprostinil as a bridge therapy for lung transplantation in 14 patients with severe PH-ILD from 2018 to 2025. Secondary objectives were to describe subsequent changes in clinical outcomes, including hemodynamic parameters measured by right heart catheterization, echocardiographic findings, the six-minute walk distance, oxygen requirements, the need for veno-arterial extracorporeal membrane oxygenation (VA-ECMO), and successful lung transplantation. Parenteral treprostinil was associated with significant improvements in pulmonary artery systolic pressure, mean pulmonary artery pressure, pulmonary vascular resistance, and BNP levels, while pulmonary capillary wedge pressure, cardiac output, cardiac index, and oxygen requirements remained stable following therapy initiation. Echocardiography demonstrated improvement in right ventricular dilation and right ventricular dysfunction. Most patients were successfully bridged to lung transplantation, while only two patients died prior to transplantation. In selected patients with severe PH-ILD, parenteral treprostinil may improve pulmonary hemodynamics and facilitate a successful bridge to lung transplantation without worsening oxygenation.