Fontan Failure Index Calculator

Fontan Failure Index: Explanation and Clinical Context The Fontan Failure Index aims to integrate hemodynamic burden (e.g. elevated central venous pressure, reduced cardiac index) and hepatic injury (represented by liver stiffness by elastography and thrombocytopenia as marker of portal hypertension) to stratify risk of clinical Fontan failure. A higher score suggests greater circulatory stress and end‑organ (hepatic) compromise, which may precede overt clinical decompensation. Clinically, this tool can support longitudinal surveillance and prompt earlier referral for advanced therapies (e.g.

Fontan revision, transplant evaluation).