Related Experiment Video

Updated: Jun 4, 2026

A Model to Simulate Clinically Relevant Hypoxia in Humans
09:54

A Model to Simulate Clinically Relevant Hypoxia in Humans

Published on: December 22, 2016

Altered cardio-respiratory response to spontaneous cortical arousals in children with upper airway obstruction

Mathias Baumert1, Mark Kohler, Muammar Kabir

  • 1Cardiovascular Research Centre, Royal Adelaide Hospital and School of Medicine, University of Adelaide, Adelaide, Australia. mathias.baumert@adelaide.edu.au

Sleep Medicine
|February 8, 2011
PubMed

Insights

Children with upper airway obstruction (UAO) show altered heart and breathing responses during sleep arousals. Treatment with adenotonsillectomy appears to normalize these cardiorespiratory changes, suggesting improved autonomic function.

Area of Science:

  • Pediatric Sleep Medicine
  • Cardiorespiratory Physiology
  • Autonomic Nervous System Function

Background:

  • Childhood upper airway obstruction (UAO) is linked to cardiovascular issues.
  • Investigating cardiorespiratory responses during sleep arousal in children with UAO is crucial for understanding potential autonomic dysfunction.

Purpose of the Study:

  • To examine the cardiorespiratory response to cortical arousal during sleep in children diagnosed with UAO.
  • To compare these responses before and after surgical intervention (adenotonsillectomy) against a control group.

Main Methods:

  • Utilized overnight polysomnography (PSG) on 40 children with UAO and 40 age/sex-matched controls.
  • Measured heart rate and respiratory rate during spontaneous and respiratory arousals in stage 2 and REM sleep.
  • Compared responses pre- and post-adenotonsillectomy in UAO patients.

Main Results:

  • Children with UAO exhibited significantly higher heart rate response in stage 2 sleep and a lower baseline respiratory rate compared to controls.
  • A prolonged increase in respiratory rate was observed in UAO children.
  • Post-adenotonsillectomy, UAO children's cardiorespiratory arousal responses normalized, becoming similar to controls.

Conclusions:

  • UAO in children is associated with abnormal cardiorespiratory responses to sleep arousal, indicating potential early autonomic dysfunction.
  • Adenotonsillectomy effectively reverses these altered cardiorespiratory responses, suggesting a beneficial impact on autonomic regulation.
Abstract

More Related Videos

Cortical Source Analysis of High-Density EEG Recordings in Children09:32

Cortical Source Analysis of High-Density EEG Recordings in Children

Published on: June 30, 2014

Measuring Cardiac Autonomic Nervous System (ANS) Activity in Children09:45

Measuring Cardiac Autonomic Nervous System (ANS) Activity in Children

Published on: April 29, 2013

Related Concept Videos

Alterations in Respiration II01:30

Alterations in Respiration II

There are numerous types of normal and abnormal respiration. Based on ventilatory movements, breathing patterns are classified as regular, deep, or shallow. Examples include Biot's breathing, Cheyne-Stokes respiration, Kussmaul's breathing, hyperventilation, and hypoventilation. Each pattern is clinically significant and aids in evaluating patients.
In Biot's breathing, the respiratory rate and depth are irregular, alternating between periods of deep gasping and apnea. Common causes include...
Acute Respiratory Failure-IV01:23

Acute Respiratory Failure-IV

Respiratory failure can manifest suddenly or gradually, characterized by a rapid decline in PaO2 and a rapid rise in PaCO2. This situation indicates a severe respiratory problem that may quickly become a life-threatening emergency. One of the early signs of hypoxemic Acute Respiratory Failure (ARF) is a change in mental status due to the brain's sensitivity to oxygen levels and changes in acid-base balance. Symptoms such as restlessness, confusion, and agitation suggest inadequate oxygen...
Hyperpnea and Hyperventilation01:25

Hyperpnea and Hyperventilation

Hyperventilation refers to a higher-than-normal rate and depth of breathing, often associated with anxiety attacks. This excessive breathing surpasses the body's need to expel CO2, leading to a condition known as hypocapnia - an unusually low level of carbon dioxide in the blood. Hypocapnia can constrict cerebral blood vessels, reducing blood flow to the brain, which may result in dizziness or fainting. Early signs include tingling and muscle spasms in the hands and face, caused by falling...
Respiratory Volumes and Capacities I01:26

Respiratory Volumes and Capacities I

Assessing the respiratory rate and rhythm for a complete minute is crucial for evaluating the breathing pattern. Even a minor increase in the patient's average respiratory rate, by as little as three to five breaths per minute, is an early and vital indicator of respiratory distress. Patients with a respiratory rate exceeding twenty-four breaths per minute require close monitoring to determine the physiological alterations. This careful observation is essential for prompt recognition and...
Cardiopulmonary Resuscitation II: ACLS Airway Management01:22

Cardiopulmonary Resuscitation II: ACLS Airway Management

Airway management is a key skill in emergency and critical care settings, as maintaining a clear airway is essential for adequate oxygenation and ventilation.Head Tilt-Chin Lift TechniqueThe head tilt-chin lift maneuver is an essential technique primarily used in patients without suspected cervical spine injuries. To perform this maneuver, one hand is placed on the patient’s forehead, and gentle pressure is applied backward to tilt the head. The fingertips of the other hand are positioned under...
Sleep-Wake Cycles01:24

Sleep-Wake Cycles

Sleep is an essential physiological process vital to maintaining overall well-being. The reticular activating system (RAS), a network of neurons in the brainstem, regulates wakefulness and sleep. While it may seem passive, sleep consists of distinct cycles, each with its unique characteristics and functions. Two key sleep phases are non-rapid eye movement (NREM) and  rapid eye movement (REM).
NREM Sleep
NREM sleep comprises four progressive stages that seamlessly merge: