| Blood pressure and heart rate rhythmicity: differential effects of late pregnancy. | |
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MedLine Citation:
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PMID: 10336153 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Arterial blood pressure (BP) and heart rate (HR) of 31 hospitalized pregnant women at low risk of hypertension were automatically monitored for 48 h at 15-min intervals. Each of the recorded 56 data series for systolic arterial pressure (SAP), diastolic arterial pressure (DAP), and HR was chronobiologically assessed by linear-nonlinear rhythmometry. The rhythm-adjusted mean (MESOR), circadian amplitude, circadian acrophase, and best-fitting period were grouped by pregnancy trimester and further subjected to analysis of variance. BP MESOR remained unaltered, whereas HR MESOR increased significantly in middle and late pregnancy. Ultradian rhythms, with an amplitude higher than that of the circadian rhythm, were found in 25% of the SAP records in the second and third trimester. Such ultradian rhythms were not detected in the simultaneously recorded HR. Finally, the group BP and HR circadian acrophases coincided in the first trimester, but were significantly apart in mid and late pregnancy. These observations support the notion that the coordination of BP and HR rhythmicity involves different physiological mechanisms. Analysis of the individual variability in the chronobiological end points (based on the records of nine women monitored in each pregnancy trimester) revealed that only the BP MESOR was well reproducible in the course of pregnancy and may be useful in early diagnosis of gestational hypertension. |
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Authors:
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A G Stoynev; P D Penev; A V Peneva; G Cornelissen; F Halberg; O C Ikonomov |
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Publication Detail:
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Type: Clinical Trial; Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S. |
Journal Detail:
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Title: Physiology & behavior Volume: 66 ISSN: 0031-9384 ISO Abbreviation: Physiol. Behav. Publication Date: 1999 Apr |
Date Detail:
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Created Date: 1999-08-02 Completed Date: 1999-08-02 Revised Date: 2007-11-14 |
Medline Journal Info:
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Nlm Unique ID: 0151504 Medline TA: Physiol Behav Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 269-75 Citation Subset: IM |
Affiliation:
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Laboratory of Physiology, Transport Medical Institute, Sofia, Bulgaria. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Activity Cycles
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physiology Adult Blood Pressure / physiology* Circadian Rhythm / physiology Female Heart Rate / physiology* Humans Pregnancy / physiology* |
| Grant Support | |
ID/Acronym/Agency:
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GM-13981/GM/NIGMS NIH HHS; HL-40650/HL/NHLBI NIH HHS |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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