Korean J Anesthesiol.  2001 Oct;41(4):455-460. 10.4097/kjae.2001.41.4.455.

Comparison of Heart Rate Variability between the Supine and Prone Position during General Anesthesia in Children

• Kim HS
• Baik JW
• Kim CS
• Kim SD
• Yum MK
• Kim HK

• KMID: 2240013
• DOI: http://doi.org/10.4097/kjae.2001.41.4.455

Abstract

BACKGROUND
It is well known that the prone position affects hemodynamics. In this study, we investigate whether the prone position will affect the heart rate variability compared with the supine position.
METHODS
Sixty five pediatric patients were assigned to supine group (n = 36) and prone group (n = 29) according to position during surgery. The patients were induced with thiopental and vecuronium and maintained with O2-enflurane-N2O. ECG data was collected for 15 minutes after saturation at the end tidal concentration of the inhalent agent. From the ECG data, power spectral analysis was performed and approximate entropy was calculated.
RESULTS
In the prone group, low frequency power and ratio of low to high frequency power were lower and approximate entropy was higher than those in the supine group. Mean heart rate and blood pressure were no different between the two groups.
CONCLUSIONS
In the prone position, sympathetic autonomic activity and balance of the autonomic nervous system decreased. However the complexity of regulation of heart rate variability was maintained in the prone position.

Keyword

heart rate variability; prone; supine

MeSH Terms

Anesthesia, General*
Autonomic Nervous System
Blood Pressure
Child*
Electrocardiography
Entropy
Heart Rate*
Heart*
Hemodynamics
Humans
Prone Position*
Supine Position
Thiopental
Vecuronium Bromide
Thiopental
Vecuronium Bromide