Five-year outcomes in a paediatric and young adult Fontan cohort: the relevance of atrial function and body mass index

Both nutritional status and atrial functional parameters demonstrated a strong association with the outcome. Reduced atrial conduit strain, reflecting diastolic dysfunction, and lower body mass index, possibly reflecting myopenia or cachexia, identified higher-risk patients and potential areas for intervention. Routine assessment of atrial function and nutritional status should be integrated into clinical surveillance and risk stratification of the Fontan population.