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Measuring Cardiac Autonomic Nervous System (ANS) Activity in Toddlers - Resting and Developmental Challenges
08:22

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nCPAP improves abnormal autonomic function in at-risk-for-SIDS infants with OSA

C Harrington1, T Kirjavainen, A Teng

  • 1David Read Laboratory, Univ. of Sydney, Missenden Rd., Camperdown, Sydney 2006, Australia. cth@med.usyd.edu.au

Journal of Applied Physiology (Bethesda, Md. : 1985)
|May 6, 2003
PubMed

Insights

Infants with obstructive sleep apnea (OSA) show impaired autonomic control and reduced arousal during sleep. Nasal continuous positive airway pressure (nCPAP) treatment improved these functions, suggesting OSA affects infant cardiovascular regulation.

Area of Science:

  • Pediatrics
  • Sleep Medicine
  • Cardiology

Background:

  • Obstructive sleep apnea (OSA) in infants can impact physiological regulation.
  • Cardiovascular autonomic control and arousal mechanisms are crucial during sleep.

Purpose of the Study:

  • To assess cardiovascular autonomic control and sleep arousability in infants with OSA.
  • To evaluate the effects of nasal continuous positive airway pressure (nCPAP) treatment on these parameters.

Main Methods:

  • Polygraphic sleep studies were conducted on 6 infants with OSA and 12 controls.
  • Head-up tilt tests were performed during slow-wave and rapid eye movement sleep, monitoring blood pressure (BP) and heart rate (HR).

Main Results:

  • OSA infants exhibited blunted BP and HR responses, with some experiencing hypotension or hypertension.
  • Higher arousal thresholds during rapid eye movement sleep and elevated baseline HR were observed in OSA infants compared to controls.
  • nCPAP treatment normalized BP and HR responses, improved arousal thresholds, and stabilized HR.

Conclusions:

  • Infant OSA is associated with disturbances in cardiovascular autonomic control and decreased sleep arousability.
  • nCPAP therapy effectively improves these physiological defects in infants with OSA.

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