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Impaired knee extension muscle strength in adolescents but not in children with Fontan circulation
Umeå University, Faculty of Medicine, Department of Community Medicine and Rehabilitation, Section of Physiotherapy. Umeå University, Faculty of Medicine, Department of Public Health and Clinical Medicine, Section of Medicine.ORCID iD: 0000-0002-4043-7130
Umeå University, Faculty of Medicine, Department of Community Medicine and Rehabilitation, Section of Physiotherapy.
Umeå University, Faculty of Medicine, Department of Clinical Sciences, Paediatrics.ORCID iD: 0000-0002-3060-031x
Umeå University, Faculty of Medicine, Department of Community Medicine and Rehabilitation, Section of Physiotherapy.
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2020 (English)In: Cardiology in the Young, ISSN 1047-9511, E-ISSN 1467-1107, Vol. 30, no 8, p. 1138-1143Article in journal (Refereed) Published
Abstract [en]

Introduction: Impaired isometric muscle strength was previously reported in adults with Fontan circulation. However, it is unclear if this impairment is present in children and adolescents with Fontan circulation. We investigated isometric muscle strength of the lower limb in patients (6–18 years) with Fontan circulation in comparison with healthy controls.

Method: In this cross-sectional study, 43 patients (6–18 years) with Fontan circulation and 43 age- and sex-matched controls were included. Isometric knee extension and plantar flexion muscle strength were assessed using dynamometry (Newton, N). Lean mass of the legs was assessed with dual-energy X-ray absorptiometry. Analyses were performed on group level (n = 43), and for subgroups that included children aged 6–12 years (n = 18) and adolescents aged 13–18 years (n = 25).

Results: On group level, the patients with Fontan circulation had impaired isometric knee extension strength in comparison with the controls (p = 0.03). In subgroup analyses, impaired isometric knee extension strength was present in the adolescents (p = 0.009) but not in the children groups. For plantar flexion, there was no difference between patients and controls. There was no difference in lean mass between patients and controls (9.6 ± 4.3 kg vs. 10.8 ± 5.6 kg, p = 0.31). However, the lean mass was highly correlated to isometric knee extension strength (patients r = 0.89, controls r = 0.96, p < 0.001) and isometric plantar flexion strength (patients r = 0.7, controls r = 0.81, p < 0.001).

Conclusion: The finding of impaired isometric knee extension muscle strength in adolescents (13–18 years) with Fontan circulation and no corresponding impairment in the children group (6–12 years) could imply that isometric muscle strength gets more impaired with age.

Place, publisher, year, edition, pages
Cambridge University Press, 2020. Vol. 30, no 8, p. 1138-1143
Keywords [en]
CHD, Fontan circulation, isometric muscle strength, knee extension, plantar flexion, dynamometry
National Category
Pediatrics
Identifiers
URN: urn:nbn:se:umu:diva-174852DOI: 10.1017/S1047951120001675ISI: 000562473300011PubMedID: 32571442Scopus ID: 2-s2.0-85089607723OAI: oai:DiVA.org:umu-174852DiVA, id: diva2:1468833
Available from: 2020-09-18 Created: 2020-09-18 Last updated: 2023-03-24Bibliographically approved

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Sandberg, CamillaHansson, LenaRydberg, Annika

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