Assessment of Liver Stiffness in Pediatric Fontan Patients Using Transient Elastography.

. Hepatic fibrosis is a potential complication following Fontan surgery and heralds long-term risk for cirrhosis. Transient elastography (TE) is a rapid, noninvasive method to assess liver fibrosis by measuring liver stiffness. . To compare liver stiffness and liver biochemistries in pediatric Fontan patients with age- and sex-matched controls and to determine patients' acceptance of TE. . Patients were recruited from British Columbia Children's Hospital. Twenty-two Fontan patients (15 males) were identified. Demographic information and cardiac data were collected. TE was measured using size-appropriate probes. . The median age of the Fontan cohort was 13.7 (5.9-16.8) years. Time from Fontan surgery to TE was 9.6 (1.0-12.9) years. The median Fontan circuit pressure was 13 (11-14) mmHg. TE values were higher in Fontan patients versus controls (18.6 versus 4.7 kPa, < 0.001). There was no association between TE values and patient age ( = 0.41, = 0.058), time since Fontan surgery ( = 0.40, = 0.062), or median Fontan circuit pressure (CVP) ( = 0.35, = 0.111). Patients found TE to be nonpainful, convenient, and safe. . TE is feasible to assess liver stiffness in children following Fontan surgery. Pediatric Fontan patients have markedly elevated liver stiffness values. TE may have important utility in liver care follow-up of pediatric Fontan patients.