Outcomes From Three Decades of Infant and Pediatric Heart Transplantation

Area of Science:

• Cardiology
• Pediatric Medicine
• Transplantation Immunology

Background:

• Infants represent a unique heart transplant population due to distinct immunological, physiological, and size characteristics compared to pediatric recipients.
• These differences suggest variations in diagnoses, comorbidities, and transplant outcomes between infant and pediatric heart transplant recipients.

Purpose of the Study:

• To compare patterns and trends in pediatric and infant heart transplantation over three decades.
• To analyze differences in diagnoses, comorbidities, and survival outcomes between these two age groups.

Main Methods:

• Utilized the United Network for Organ Sharing (UNOS) database for heart transplants performed between January 1990 and December 2018.
• Categorized patients into infant (0-1 years) and pediatric (1-17 years) groups.
• Analyzed trends in primary diagnoses (Congenital Heart Disease - CHD), transplant types, and patient outcomes.

Main Results:

• Congenital Heart Disease (CHD) prevalence shifted, increasing in pediatric patients and decreasing in infants.
• Patients with CHD experienced worse outcomes in both age groups.
• Infants demonstrated superior long-term survival and graft survival but poorer short-term survival compared to pediatric recipients.
• Infants had lower rates of death from rejection/graft failure but significantly higher mortality from infection.

Conclusions:

• Pediatric and infant heart transplant recipients exhibit distinct diagnostic profiles, comorbidities, and survival trajectories.
• The unique characteristics of infants necessitate specialized care protocols to optimize transplant outcomes.
• Understanding these age-specific differences is crucial for improving management and long-term success in pediatric and infant heart transplantation.