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Short-term development of transplant-related coronary artery disease in orthotopic cardiac allograft recipients
Insights
Cytomegalovirus infection and ABO blood type incompatibility may contribute to early allograft vasculopathy in heart transplant recipients. These factors were observed in three patients who experienced fatal chronic vascular rejection post-transplant.
Area of Science:
- Cardiology
- Transplantation Immunology
- Infectious Diseases
Background:
- Transplant-related coronary artery disease (allograft vasculopathy) is a leading cause of late mortality in orthotopic heart transplant recipients.
- Early detection and management of complications are crucial for improving long-term outcomes.
Observation:
- A case series of 3 out of 71 heart transplant recipients experiencing chronic vascular rejection at 4, 10, and 15 months post-transplant.
- All three patients had ABO blood type incompatible grafts and developed cytomegalovirus (CMV) infection (primary or reactivation).
- Immunosuppression included lymphocyte antibody therapy, cyclosporine, azathioprine, and methylprednisolone.
Findings:
- Histological examination revealed cellular and vascular rejection in one patient, and pure vascular rejection in two patients.
- All three patients with early chronic vascular rejection experienced fatal outcomes.
- Cytomegalovirus infection and partial ABO blood group incompatibility were associated with these cases.
Implications:
- Cytomegalovirus infection and ABO incompatibility may play a significant role in the early development of allograft vasculopathy.
- These factors should be considered in risk stratification and management strategies for heart transplant recipients.
- Further research is warranted to elucidate the mechanisms and optimize prevention/treatment of early allograft vasculopathy.
Abstract:
Transplant-related coronary artery disease is the main cause of death in orthotopic heart transplant recipients one year or more after operation. We report our own experience with chronic vascular rejection occurring 4, 10, and 15 months after transplantation in 3 of 71 consecutive patients. Immunosuppressive regimen included perioperative lymphocyte antibody therapy, cyclosporine, azathioprine and methylprednisolone. All 3 patients received cardiac allografts from donors not the same ABO blood type and developed cytomegalovirus infection (one primary phase infection and two reactivations). Death occurred in all of them. Histologic signs of both cellular and vascular rejection were found in one patient and two had pure vascular rejection. These observations support the potential role of cytomegalovirus infection and donor-recipient partial ABO blood type group incompatibility in the development of allograft vasculopathy as a short-term complication in heart transplant recipients.