Risk factors for primary graft failure after pediatric cardiac transplantation: importance of recipient and donor characteristics
Related Experiment Video
Updated: Aug 22, 2026
Cardiac Loading using Passive Left Atrial Pressurization and Passive Afterload for Graft Assessment
Published on: August 2, 2024
Jennifer Huang1, Kim Trinkaus, Charles B Huddleston
1Division of Pediatric Cardiology, Department of Pediatrics, Washington University, St. Louis, Missouri, USA.
Insights
Primary graft failure is a major risk after pediatric heart transplants. Identifying high-risk donors and recipients, including those with congenital heart disease, can improve transplant outcomes.
Area of Science:
- Cardiology
- Transplantation Medicine
- Pediatric Surgery
Background:
- Primary graft failure is a critical complication following pediatric cardiac transplantation.
- It is the leading cause of mortality in infant heart transplant recipients.
- Risk factors contributing to primary graft failure in children remain incompletely understood.
Purpose of the Study:
- To identify and characterize the risk factors associated with primary graft failure in pediatric cardiac transplantation.
- To analyze donor, procedural, and recipient variables influencing early graft dysfunction.
Main Methods:
- Retrospective review of 165 pediatric cardiac transplant recipients.
- Multivariable logistic regression analysis to assess risk factors.
- Definition of primary graft failure included need for mechanical circulatory support or intensive inotropic/pressor support within 24 hours post-transplant.
Main Results:
- Primary graft failure occurred in 33% of patients; 15% required mechanical support.
- Recipient factors: congenital heart disease and pre-transplant mechanical support increased risk.
- Donor factors: increased donor-recipient size ratio, longer ischemic time, anoxia, and CPR time were associated with higher risk.
- Donor blood type O+ and hyperdynamic systolic function were protective.
Conclusions:
- Numerous donor, recipient, and procedural factors are linked to primary graft failure in pediatric heart transplantation.
- Recipient's pre-existing heart condition severity is a significant risk factor.
- Optimizing donor-recipient matching by avoiding high-risk pairings may reduce post-transplant morbidity and mortality.
Background:
Primary graft failure, or circulatory insufficiency immediately after transplantation, frequently occurs after pediatric cardiac transplantation and is the most common cause of death after infant transplantation. Risk factors for pediatric primary graft failure are poorly defined.
Methods:
We retrospectively reviewed donor, procedural and recipient characteristics for primary graft failure in 165 pediatric cardiac transplant recipients (median age at transplant 1.1 years) by multivariatle logistic regression. Primary graft failure was defined as the need for mechanical circulatory support or use of multiple intravenous inotrope/pressors, including epinephrine, for circulatory support within the first 24 hours after transplantation.
Results:
Primary graft failure occurred in 54 patients (33%); 24 patients (15%) required mechanical support for their graft failure; and primary graft failure was the cause of death or graft loss in 10 patients. Recipient risk factors associated with an increased risk of primary graft failure included diagnosis of congenital heart disease and a need for mechanical support before transplantation. Ventilator support before transplantation and maximal pulmonary vascular resistance index were risk factors for the development of isolated right ventricular graft failure. Donor risk factors associated with an increased risk for primary graft failure included increasing donor recipient weight and body surface area ratios; increasing donor ischemic time; anoxia as a cause of death; and increasing cardiopulmonary resuscitation time. Donor blood type O+ and hyperdynamic donor systolic function were associated with a decreased risk of primary graft failure.
Conclusions:
Multiple donor, recipient and procedural risk factors, including the type and severity of heart disease in the recipient before transplantation, are associated with primary graft failure after pediatric cardiac transplantation. Avoidance of matching high-risk donors to high-risk recipients may improve morbidity and mortality after transplantation.
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