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Comparison of changes in heart rate variability and sacral skin perfusion in response to postural changes in people with

Comparison of changes in heart rate variability and sacral skin perfusion in response to postural changes in people with spinal cord injury. Yih-Kuen Jan, PT, PhD; Mark Anderson, PT, PhD; Jeanine Soltani, PT, PhD; Stephanie Burns, PT, PhD; Robert D. Formane, PhD. Aim

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Comparison of changes in heart rate variability and sacral skin perfusion in response to postural changes in people with

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  1. Comparison of changes in heart rate variability and sacral skin perfusion in response to postural changes in people with spinal cord injury Yih-Kuen Jan, PT, PhD; Mark Anderson, PT, PhD; Jeanine Soltani, PT, PhD; Stephanie Burns, PT, PhD; Robert D. Formane, PhD

  2. Aim • Compare changes in sympathovagal balance assessment by heart rate variability (HRV) and skin perfusion in response to postural changes in people with spinal cord injury (SCI). • Relevance • Current clinical practice has established guidelines to assess influence of severity of autonomic injury on control of heart and blood pressure following SCI. • However, influences of SCI-induced autonomic impairment on microvascular dysfunction have not yet been established.

  3. Method • 26 participants: • 12 people with SCI. • 14 nondisabled controls. • HRV and sacral skin perfusion were continually recorded during 10 min upright and 10 min prone postures.

  4. Results • Nondisabled: • Postural changes produced significant changes in sympathovagal balance. • Lower sympathovagal balance associated with higher skin perfusion. • People with SCI: • No significant change of HRV and skin perfusion in response to postural changes.

  5. Results Skin perfusion increased in prone posture in (a) nondisabled control, but not (b) person with SCI. Beat-to-beat interval of heart rate intervals increased in (c) nondisabled control, but not (d) person with SCI. Power of low frequency of heart rate variability increased in prone posture in (e) nondisabled control, but not (f) person with SCI. PSD = power spectrum density. This article and any supplementary material should be cited as follows: Melcer T, Belnap B, Walker GJ, Konoske P, Galarneau M. Heterotopic ossification in combat amputees from Afghanistan and Iraq wars: Five case histories and results from a small series of patients. J Rehabil Res Dev. 2011; 48(1):1–12. DOI:10.1682/JRRD.2010.03.0033

  6. Conclusion • Sympathovagal balance assessed by HRV was associated with skin vasoconstrictive response to postural changes.

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