Changes in the cardiac autonomic control system during rehabilitation in children after severe traumatic brain injury - 04/04/23
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Highlights |
• | Cardiac autonomic function is impaired in children after severe TBI. |
• | Cardiac autonomic measures at rest did not change during the sub-acute stage. |
• | Cardiac autonomic measures recovered in part in response to autonomic tests. |
• | Clinical trials of interventions to improve cardiac autonomic function are needed. |
Abstract |
Background |
One of the sequalae of severe traumatic brain injury (TBI) in children is impaired function of the cardiac autonomic control system (CACS) at rest. The CACS response to conventional autonomic tests is little known.
Objective |
To examine the CACS response to conventional autonomic tests in children after severe TBI during the rehabilitation period and to compare with typically developing (TD) children.
Methods |
This study combined a case-control and follow-up design. The severe TBI group (cases) consisted of 33 children aged 9–18 years, 14–142 days after severe TBI who were followed for 8 weeks during rehabilitation. The control group consisted of 19 TD children matched for age and sex. Heart rate (HR) and heart rate variability (HRV) were evaluated with the Polar RS800CX device at rest (sitting), during a handgrip test and during a paced breathing test.
Results |
At the first assessment, we found lower HRV values at rest and a lower HRV response during the paced breathing and handgrip tests in the TBI group than the TD group (p<0.01). After 8 weeks, HRV values did not change at rest in the TBI group, but the response to the autonomic tests improved significantly, with increased HRV values in response to the paced breathing test (p<0.01) and the handgrip test (p = 0.01).
Conclusions |
After severe TBI, children exhibited an impaired CACS response to autonomic tests, with parasympathetic suppression and sympathetic arousal. After 8 weeks of rehabilitation, CACS function recovered partially and the response to the autonomic tests improved with no change in CACS function at rest.
Il testo completo di questo articolo è disponibile in PDF.Keywords : Traumatic brain injury, Cardiac autonomic control system, Children and adolescents, Handgrip test, Paced breathing test
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Vol 66 - N° 2
Articolo 101652- marzo 2023 Ritorno al numero
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