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Effect of maternal position and uterine activity on periodic maternal heart rate changes before elective cesarean section at term
Linköping University, Department of Clinical and Experimental Medicine, Division of Clinical Sciences. Linköping University, Faculty of Medicine and Health Sciences.
Linköping University, Department of Clinical and Experimental Medicine, Division of Clinical Sciences. Linköping University, Faculty of Medicine and Health Sciences.
University of Stellenbosch, South Africa.
University of Stellenbosch, South Africa.
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2015 (English)In: Acta Obstetricia et Gynecologica Scandinavica, ISSN 0001-6349, E-ISSN 1600-0412, Vol. 94, no 12, 1359-1366 p.Article in journal (Refereed) PublishedText
Abstract [en]

Introduction. Because little is known about the effects of maternal position on periodic changes in the maternal heart rate (MHR) in late pregnancy, a prospective observational study was done at Tygerberg Academic Hospital in Cape Town. Pregnant women admitted for elective cesarean section were studied to determine the effect of changes in position on the maternal and fetal heart rates (FHR) and maternal blood pressure. Material and methods. Continuous transabdominal non-invasive recording of MHR, FHR patterns and uterine activity was done for 1 h in 119 women, using the AN24 device from Monica Health Care. Maternal position was changed every 15 min from lateral to supine, then to the other lateral position and finally supine again. Blood pressure was measured in the left arm and left lower leg three times during each 15-min period. Results. MHRs were four beats per minute slower in the left lateral position than in the right lateral position. Periodic MHR changes were seen in 13 (10.9%) women. Most of these (84.6%) were associated with uterine activity and not with maternal position. No changes in FHR patterns were observed after position changes. Conclusions. In a subgroup of pregnant women at term, uterine activity was associated with periodic decelerations of the MHR. In low risk pregnancies there seems to be no effect on the FHR pattern. Implications for the compromised fetus have not yet been investigated.

Place, publisher, year, edition, pages
WILEY-BLACKWELL , 2015. Vol. 94, no 12, 1359-1366 p.
Keyword [en]
Maternal heart rate; periodic changes; Monica AN24; uterine activity
National Category
Clinical Medicine
Identifiers
URN: urn:nbn:se:liu:diva-124510DOI: 10.1111/aogs.12763ISI: 000367340800012PubMedID: 26335140OAI: oai:DiVA.org:liu-124510DiVA: diva2:899578
Note

Funding Agencies|Swedish International Development Cooperation Agency; Department of Obstetrics and Gynaecology, Stellenbosch University

Available from: 2016-02-02 Created: 2016-02-01 Last updated: 2016-02-02

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