Thoracic retransplantation: Does time to retransplantation matter?

Area of Science:

• Cardiology
• Thoracic Surgery
• Transplantation Medicine

Background:

• Chronic allograft failure may necessitate retransplantation for improved patient outcomes.
• Evaluating the impact of time to retransplantation on survival is crucial for optimizing patient management.

Purpose of the Study:

• To investigate whether the duration to retransplantation influences short- and long-term survival in adult heart and lung recipients.
• To analyze outcomes based on tertiles of time to retransplantation, specifically for intervals exceeding one year.

Main Methods:

• Utilized the United Network for Organ Sharing/Organ Procurement and Transplantation Network STAR file for heart and lung retransplants (2005-2020).
• Categorized patients into tertiles based on time to retransplantation (heart: 1-7.7, 7.7-14.7, 14.7+ years; lung: 1-2.8, 2.8-5.6, 5.6+ years).
• Employed Kaplan-Meier methods and Cox proportional hazard models to assess survival post-retransplantation.

Main Results:

• No significant survival differences were observed among heart retransplant groups, despite variations in pre-transplant characteristics.
• Lung retransplant recipients in the shortest time tertile (1-2.8 years) demonstrated decreased survival.
• Morbidity and in-hospital mortality were similar across time-to-retransplantation groups for heart recipients.

Conclusions:

• Time to retransplantation does not appear to impact survival for heart recipients undergoing retransplantation more than one year after the initial transplant.
• A shorter time to retransplantation (less than 2.8 years) in lung recipients is associated with diminished survival, warranting careful pre-transplant evaluation.
• These findings suggest distinct considerations for heart versus lung retransplantation timing.