Related Experiment Video
Updated: Jul 17, 2026

A Model to Simulate Clinically Relevant Hypoxia in Humans
Published on: December 22, 2016
Heart rate chaos in obstructive sleep apnea in children
Abstract:
Obstructive sleep apnea syndrome (OSAS) in children is associated with a bradytachyarrhythmia during an obstructive event. Polysomnographic recordings were obtained from 15 children; 9 had OSAS (apnea/hypopnea index = 13.6 +/- 8.2/hr, mean +/- SD) and 6 normal controls. Heart rate variability was analyzed for the presence of chaotic dynamics. Using a 5-minute sliding window, chaos was detected using numerical titration technique. In both groups, REM had a higher chaotic intensity than NREM sleep (p < 0.05). Furthermore, chaos was significantly increased during periods with apneic events compared to stable breathing. These data indicate that sleep state and disordered breathing are important determinants of the autonomic control of heart rate chaos in children.
Related Concept Videos
Sleep Apnea
The condition is more prevalent among...
Special considerations while measuring oxygen saturation
Ensuring accuracy in vital sign recordings while prioritizing patient comfort and minimizing anxiety is important.
Respiratory Volumes and Capacities I
Assessment of Ventilation I: Respiratory Rate
A Ventilation assessment is critical for monitoring a patient's health status. Respiration, one of the most accessible vital signs, provides insights into the function of numerous body systems and can indicate serious health issues, such as brainstem injuries from head trauma.
Critical Guidelines for Assessing Ventilation:
Dysrhythmias III: Characteristics of Dysrhythmias
Dysrhythmias IV: Characteristics of Bradyarrhythmias