Evaluation of Exercise Performance, Cardiac Function, and Quality of Life in Children After Liver Transplantation.

Background: In children, after having liver transplantation (LT), it is important to assess the quality of life (QOL). Physical fitness is an important determinant of QOL, and because cardiac function can influence exercise performance, it is the purpose of the present study to assess these factors. Methods: Children in stable follow-up for more than 6 months post-LT were invited to participate in a case control study. Patients underwent cardiopulmonary exercise testing and echocardiography to assess systolic and diastolic function, and left ventricular wall dimensions. Health-related QOL was evaluated using child- and adolescent-reported PedsQL questionnaire. Results: Twenty-eight of 31 included patients performed a maximal exercise test (15 boys, 11.6 +/- 2.9 years, weight, 40.9 +/- 13.1 kg; length, 148.6 +/- 17.3 cm; body mass index, 17.6 +/- 2.3). Liver transplantation patients had lower maximal oxygen consumption (VO2max/kg) (37.5 +/- 9.3 mL/kg per minute vs 44.1 +/- 8.8 mL/kg per minute), shorter exercise duration (9.3 +/- 2.8 minutes vs 13.3 +/- 3 minutes) and lower load (71 +/- 14 vs 85 +/- 20%). They reached the ventilatory anaerobic threshold earlier (81.4 +/- 9.5 vs 88.3 +/- 11.9%). Echocardiography demonstrated increased interventricular septal wall thickness (interventricular septum in diastole Z value, +0.45 +/- 0.49, P

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