Document Detail

Return of autonomic nervous activity after delivery: role of aortocaval compression.
MedLine Citation:
PMID:  10562793     Owner:  NLM     Status:  MEDLINE    
We have compared measures of heart rate variability (HRV) in 15 women in late pregnancy before and 3 months after delivery and in 20 non-pregnant controls, to study the effect of aortocaval compression on autonomic nervous activity. Normalized high-frequency power was used as an index of vagal activity and the low-/high-frequency power ratio as index of sympathovagal balance. We found that the decrease in vagal activity and increase in sympathovagal balance before delivery returned to normal 3 months after delivery. Percentage changes in vagal activity and sympathovagal balance 3 months after delivery in the left lateral decubitus position were least among three recumbent positions. The relief of aortocaval compression as a result of delivery of the fetus may be the main cause of return of autonomic nervous activity 3 months after delivery. Postpartum hormonal changes may also contribute to return of autonomic nervous activity after delivery.
G Y Chen; C D Kuo; M J Yang; H M Lo; Y S Tsai
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  British journal of anaesthesia     Volume:  82     ISSN:  0007-0912     ISO Abbreviation:  Br J Anaesth     Publication Date:  1999 Jun 
Date Detail:
Created Date:  1999-11-16     Completed Date:  1999-11-16     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0372541     Medline TA:  Br J Anaesth     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  932-4     Citation Subset:  IM    
Department of Medicine, Provincial Tao-Yuan General Hospital, Taiwan, Republic of China.
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MeSH Terms
Autonomic Nervous System / physiopathology*
Case-Control Studies
Heart Rate / physiology*
Hypotension, Orthostatic / physiopathology*
Parasympathetic Nervous System / physiopathology
Postpartum Period
Pregnancy Complications / physiopathology*
Statistics, Nonparametric
Supine Position
Sympathetic Nervous System / physiopathology
Venae Cavae*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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