Abstract 14633: Cardiopulmonary Exercise Testing as a Predictor of Liver Disease in Fontan Patients: Two Tertiary Center Experience

Introduction: Liver disease (LD) is a known long-term complication in single ventricle patients who undergo Fontan procedures. Cardiopulmonary exercise test (CPET) variables are known to be associated with increased risk of hospitalization in Fontan patients but their association with liver disease is unknown. Methods/Results: We retrospectively reviewed medical records from 2 tertiary academic institutions (Central Manchester University Hospitals, UK and University of California San Francisco, USA) and identified 114 adult Fontan patients (>18 years). LD was defined as grade IV fibrosis or cirrhosis on either ultrasound or computed tomographic imaging. Mean age was 30.9 ± 7.4 years, age at Fontan 7.9 ± 7.9 years, 56% were females, 63% underwent total cavopulmonary connection, 66% had New York Heart Association (NYHA) I, 42% had arrhythmias, 22% had systemic right ventricle and 35% had ventricular dysfunction. Of 81 patients with liver imaging data, 33 (41%) had LD. There were no differences in the demogr...