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Multi-Organ Transplantation in Adult Congenital Heart Disease: Navigating the Unique Challenges of a Distinct Patient
Valeria E Duarte1, Marcus A Urey2, Eric D Adler2
1Houston Methodist DeBakey Heart & Vascular Center, Houston Methodist, Houston, Texas, US.
Insights
Adult congenital heart disease (ACHD) patients face unique challenges in heart transplantation, often requiring multi-organ transplants due to extracardiac issues. Specialized care and allocation systems are vital for improving outcomes in this growing population.
Area of Science:
- Cardiology
- Transplantation Medicine
- Adult Congenital Heart Disease
Background:
- Prevalence of adult congenital heart disease (ACHD) is rising, with heart failure as a leading cause of mortality.
- Heart transplantation is a critical option for advanced heart failure in ACHD patients, but multi-organ needs are common.
- Significant disparities exist between ACHD patients needing transplants and those receiving them.
Purpose of the Study:
- To highlight the complexities and challenges of heart transplantation in ACHD patients.
- To emphasize the need for specialized care pathways and organ allocation system revisions.
- To discuss the unique immunological, surgical, and psychosocial aspects of ACHD transplantation.
Main Methods:
- Review of current challenges in ACHD transplantation.
- Analysis of outcomes and complications in ACHD recipients.
- Discussion of specialized pre- and post-transplant management strategies.
Main Results:
- ACHD patients often require multi-organ transplants due to common extracardiac organ dysfunction (e.g., liver, lung, kidney).
- Unique immunological profiles increase risks of infection, rejection, and malignancy, necessitating tailored immunosuppression.
- Surgical challenges include complex anatomy, bleeding risks, and extended procedures.
Conclusions:
- ACHD transplantation outcomes can be comparable or superior to other cardiomyopathies despite short-term risks.
- Dedicated multidisciplinary teams and specialized care centers are essential for optimal ACHD transplant management.
- A revised organ allocation system is crucial to ensure equitable access for ACHD patients.
Abstract:
The prevalence of adult congenital heart disease (ACHD) is increasing, with heart failure being the leading cause of death. For many ACHD patients, heart transplantation is the only treatment option for advanced heart failure, though significant extracardiac involvement may require multi-organ transplantation. Despite the rising number of ACHD transplants, multi-organ transplants in this population remain challenging, and a substantial gap remains between those in need and those who receive a transplant. While short-term outcomes may be worse for ACHD patients, long-term outcomes are comparable and even superior to other cardiomyopathies. Extracardiac organ dysfunction is common in ACHD patients, often precluding heart-alone transplantation. Fontan-associated liver disease, pulmonary vascular and restrictive lung disease, and renal dysfunction frequently necessitate multi-organ transplantation. ACHD patients have a unique immunological and sensitization profile, increasing their risk for infection, rejection, and malignancies, requiring specialized pretransplant desensitization and post-transplant immunosuppression strategies. ACHD transplantation presents unique surgical challenges, including chest reentry, vascular access issues, bleeding risks, extensive anatomical reconstruction, the need for longer vascular segments from donors, and prolonged ischemic times. Decisions regarding heart-alone versus heart-liver, heart-lung, or heart-kidney transplantation demand careful evaluation. These complex surgical plans require extensive multimodal imaging and collaboration with ACHD cardiac imaging specialists and abdominal transplant teams. Comprehensive coordination and psychosocial support are crucial for ACHD patients throughout the transplant process. A dedicated multidisciplinary team and an established and separate pathway for pre-, peri-, and postoperative care in centers with ACHD and multi-organ transplant expertise are essential. There is need for a revised organ allocation system to ensure timely access to transplantation for ACHD patients.
