| Return of autonomic nervous activity after delivery: role of aortocaval compression. | |
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MedLine Citation:
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PMID: 10562793 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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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. |
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Authors:
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G Y Chen; C D Kuo; M J Yang; H M Lo; Y S Tsai |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: British journal of anaesthesia Volume: 82 ISSN: 0007-0912 ISO Abbreviation: Br J Anaesth Publication Date: 1999 Jun |
Date Detail:
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Created Date: 1999-11-16 Completed Date: 1999-11-16 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 0372541 Medline TA: Br J Anaesth Country: ENGLAND |
Other Details:
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Languages: eng Pagination: 932-4 Citation Subset: IM |
Affiliation:
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Department of Medicine, Provincial Tao-Yuan General Hospital, Taiwan, Republic of China. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Aorta* Autonomic Nervous System / physiopathology* Case-Control Studies Female Heart Rate / physiology* Humans Hypotension, Orthostatic / physiopathology* Parasympathetic Nervous System / physiopathology Postpartum Period Pregnancy Pregnancy Complications / physiopathology* Pressure Statistics, Nonparametric Supine Position Sympathetic Nervous System / physiopathology Venae Cavae* |
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