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

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

Published on: February 25, 2016

Autonomic dysfunction in children with sleep-disordered breathing

Louise M O'Brien1, David Gozal

  • 1Kosair Children's Hospital Research Institute, and Division of Pediatric Sleep Medicine, Department of Pediatrics, University of Louisville, Louisville, KY 40202, USA.

Sleep
|February 16, 2006
PubMed

Insights

Children with sleep-disordered breathing exhibit heightened sympathetic nervous system responses during wakefulness. This study reveals increased vascular reactivity, indicating altered autonomic regulation in these children.

Area of Science:

  • Pediatric Sleep Medicine
  • Autonomic Nervous System Physiology
  • Cardiovascular Regulation

Background:

  • Sleep-disordered breathing (SDB) is prevalent in children and linked to various health issues.
  • The impact of SDB on the developing autonomic nervous system (ANS) requires further investigation.
  • Sympathetic nervous system activity plays a crucial role in cardiovascular homeostasis.

Purpose of the Study:

  • To quantify sympathetic nervous system responses in children with and without SDB.
  • To compare vascular reactivity between children diagnosed with SDB and healthy controls.
  • To assess autonomic nervous system regulation during wakefulness in pediatric SDB.

Main Methods:

  • A prospective, observational study conducted at a children's hospital sleep center.
  • Participants were grouped based on polysomnography results: SDB (apnea-hypopnea index >5) and controls (apnea-hypopnea index <1).
  • Sympathetic activity was measured using pulse arterial tonometry during vital capacity sighs and a cold pressor test.

Main Results:

  • Children with SDB demonstrated significantly greater sympathetic vascular reactivity during sigh maneuvers (74.1% vs. 59.2%) and the cold pressor test (83.5% vs. 74.1%).
  • Recovery kinetics following sympathetic stimulation were slower in children with SDB compared to controls.
  • These findings highlight increased sympathetic vascular reactivity in children with SDB during wakefulness.

Conclusions:

  • Pediatric SDB is associated with altered autonomic nervous system regulation.
  • Increased sympathetic vascular reactivity during wakefulness is a key finding in children with SDB.
  • These autonomic changes may contribute to the cardiovascular complications observed in pediatric SDB.
Abstract

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