Abstract
The aim of this study was to evaluate an exercise test in pediatric liver transplant recipients and its relation to their cardiac function. This cross-sectional study was conducted on 58 children who had successfully undergone orthotopic liver transplantation at least 6 months prior to the study, with the same age and gender-matched control group. M-mode, Doppler, tissue Doppler echocardiography and an exercise test were performed for all the participants. The VO2 values and METS in patients were less than the control (P = 0.001). Left ventricular posterior wall thickness in systole, left ventricular posterior wall thickness in diastole, interventricular septum diameter in diastole, AT, pulmonary acceleration time, ST and EaT, AaM, and SS had a significant difference between patients and the control group (P value < 0.05). Maximal oxygen consumption (Max VO2) and metabolic equivalent task (METs) values had a significant correlation with tricuspid valve S parameter (P = 0.018, r = 0.310). Max VO2 and METs values did not have a significant correlation with the diastolic dysfunction index, such as E/A and E/Ea. In this study, the exercise test showed decreased functional capacity in liver-transplanted children; however, the echocardiographic evaluation did not reveal any definite correlation with systolic or diastolic dysfunction.
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Acknowledgements
The authors thank the transplant and cardiac research center at Shiraz University of Medical Sciences, Shiraz, Iran. The authors would also like to thank Mr. H. Argasi at the Research Consultation Center (RCC) at Shiraz University of Medical Sciences for his invaluable assistance in editing this manuscript. Finally, we would like to thank Dr. Varahram and Ms. Marzban in the Emam Reza exercise test unit for their cooperation in performing exercise tests. We acknowledge the Vice Chancellor of Research at Shiraz University of Medical Sciences for their financial support with the Grant Number 6944.
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All procedures involving human participants were in accordance with the ethical standards of Shiraz University of Medical Sciences research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.
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Written informed consents were obtained from the patients and/or their parents/guardian prior to their enrolment in this study.
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Dehghani, S.M., Moshref, M., Amoozgar, H. et al. Exercise Performance in Pediatric Liver Transplant Recipients and Its Related Cardiac Function. Pediatr Cardiol 39, 548–554 (2018). https://doi.org/10.1007/s00246-017-1786-3
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DOI: https://doi.org/10.1007/s00246-017-1786-3