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Fontan circulation and transplantation: Considerations for the complex candidate
Drishti Tolani1, Sharon Chen2, Edo Bedzra3
1Department of Pediatric Cardiology, Cleveland Clinic Children's, Cleveland, OH.
Insights
The Fontan operation improves survival for single ventricle heart disease but can lead to Fontan circulatory failure (FCF). Early recognition and heart transplant evaluation are crucial for managing FCF and optimizing long-term outcomes.
Area of Science:
- Cardiology
- Pediatric Cardiology
- Congenital Heart Disease
Background:
- The Fontan operation significantly improves survival in single ventricle congenital heart disease.
- Long-term durability of the Fontan physiology is limited, leading to Fontan circulatory failure (FCF).
- FCF is a progressive condition causing multiorgan dysfunction and increased post-transplant risk if not identified early.
Purpose of the Study:
- To review the pathophysiology of Fontan failure.
- To outline consensus indications for heart transplant evaluation in Fontan patients.
- To highlight essential pre-transplant strategies for optimizing outcomes.
Main Methods:
- Literature review synthesizing current evidence on Fontan failure.
- Analysis of consensus guidelines for transplant referral.
- Discussion of pre-transplant management strategies.
Main Results:
- Fontan failure is characterized by multiorgan dysfunction and lymphatic issues.
- Delayed referrals for advanced therapies are common, with patients often presenting in advanced decline.
- Advances in surgical techniques and mechanical support have improved post-transplant survival.
Conclusions:
- Heart transplantation is the definitive treatment for advanced Fontan failure.
- Timely referral, equitable access, and comprehensive pre-transplant care are critical.
- Multidisciplinary coordination and early recognition are key to improving outcomes for this growing population.
Abstract:
The Fontan operation has transformed survival for patients with single ventricle congenital heart disease, but the long-term durability of this physiology remains limited. Fontan circulatory failure (FCF) is a progressive, heterogeneous condition associated with multiorgan dysfunction, lymphatic failure, and elevated post-transplant risk when not recognized early. With increasing survival into adulthood, heart transplantation has emerged as the definitive "fourth stage" of palliation. However, referrals for advanced therapies are often delayed, with many patients presenting in advanced stages of decline. This review synthesizes current evidence on the pathophysiology of Fontan failure, outlines consensus indications for transplant evaluation, and highlights pre-transplant strategies including management of end-organ dysfunction, collateral embolization, and psychosocial readiness that are essential to optimizing outcomes. Advances in surgical technique and mechanical support has markedly improved post-transplant survival, yet challenges remain in timely referral, equitable access, and transition care. Early recognition and multidisciplinary coordination is key to improving outcomes in this vulnerable and growing population.
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