Obstructive Sleep Apnea Better After Adenotonsillectomy

Heart rate variability decreased after adenotonsillectomy in children

THURSDAY, May 5 (HealthDay News) -- In children with obstructive sleep apnea syndrome (OSAS), sleep-disordered breathing improves after adenotonsillectomy possibly due to decreases in the sympathetic activity of the autonomic nervous system, according to a study published in the May issue of Chest.

Hiren V. Muzumdar, M.D., from the Children's Hospital at Montefiore in New York City, and colleagues measured changes in heart rate variability (HRV) in 18 children with an average age of 4.9 years with OSAS and adenotonsillar hypertrophy who underwent adenotonsillectomy and had a subsequent improvement in OSAS. Participants underwent polysomnography before and after adenotonsillectomy, and changes in heart rate (HR) and HRV time and frequency were analyzed in two-minute epochs free of respiratory events during light, deep, and REM sleep.

The investigators found that the apnea-hypopnea index decreased from an average of 31.9 events/hour to 4.1 events/hour after adenotonsillectomy. The average HR decreased in all stages of sleep after adenotonsillectomy: from 99.8 to 80.7 beats/minute in light sleep, from 100.2 to 80.5 beats/minute in deep sleep, and from 106.9 to 87.0 beats/minute in REM sleep. The average ratio of low-frequency to high-frequency band power decreased in all stages of sleep after adenotonsillectomy: from 1.6 to 0.6 in light sleep, from 1.2 to 0.5 in deep sleep, and from 3.0 to 1.4 in REM sleep.

"This study demonstrates that improvement in OSAS following adenotonsillectomy in children is associated with changes in autonomic balance as shown on HRV analysis," the authors write.

Full Text (subscription or payment may be required)

Copyright © 2011 HealthDay. All rights reserved.

Powered by

jQuery UI Accordion - Default functionality

For life-long learning and continuing professional development, come to Lippincott's NursingCenter.

Nursing Jobs Plus
Featured Jobs
Recommended CE Articles

Debunking Three Rape Myths
Journal of Forensic Nursing, October/December 2014
Expires: 12/31/2016 CE:2.5 $24.95

Drug updates and approvals: 2014 in review
The Nurse Practitioner, 13December 2014
Expires: 12/31/2016 CE:3 $27.95

Can Food Processing Enhance Cancer Protection?
Nutrition Today, September/October 2014
Expires: 10/31/2016 CE:2 $21.95

More CE Articles

Subscribe to Recommended CE

Recommended Nursing Articles Evidence Based Practice Skin Care Network NursingCenter Quick Links What’s Trending Events