Positive pretransplantation cytomegalovirus serology is a risk factor for cardiac allograft vasculopathy in children

Area of Science:

• Pediatric Cardiology
• Transplant Immunology
• Infectious Diseases

Background:

• Cytomegalovirus (CMV) infection is linked to posttransplantation coronary artery disease in adults.
• The impact of CMV on pediatric heart transplant outcomes requires further evaluation.

Purpose of the Study:

• To assess the influence of CMV on outcomes in children undergoing heart transplantation.
• To identify predictors of coronary artery disease and mortality post-pediatric heart transplant.

Main Methods:

• Retrospective observational study of 165 children undergoing heart transplantation.
• Analysis of risk factors including recipient/donor CMV serology, age, sex, and CMV prophylaxis.
• Proportional hazards modeling used to evaluate outcomes: coronary artery vasculopathy, mortality, and coronary death.

Main Results:

• Traditional CMV risk stratification (donor/recipient serology) correlated with CMV infection but not adverse outcomes.
• Positive recipient CMV serology was the sole independent predictor of coronary artery disease (HR=3.6), all-cause mortality (HR=4.1), and coronary death (HR=4.6).
• 32 children had CMV infection; only 6 developed CMV disease or syndrome.

Conclusions:

• Pretransplantation recipient CMV status is a stronger predictor of significant vasculopathy and death in pediatric heart transplant recipients than traditional risk stratification.
• Recipient CMV status significantly impacts long-term graft survival and patient outcomes.
• Further research is warranted to investigate this predictive relationship.