| Diurnal, respiratory, and other rhythms of fetal heart rate in lambs. | |
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MedLine Citation:
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PMID: 556883 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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In lambs during the last third of gestation fetal heart periods were measured to 0.2 msec. and the variation was calculated with a computer in real time. The rate was subject to low-frequency variations in association with breathing movements, with a 2 to 4 hour rhythm of large amplitude and unknown origin, with the time of day, and with increasing gestational age. The calculated standard deviation of heart period bore a semilogarithmic relation to increasing length of observational epoch. There were also multiple rhythms in heart rate variability. The immeidate effect of fetal hypoxia was to increase heart rate variability despite the arrest of fetal breathing movements. The analysis of heart rate variability is examined critically. |
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Authors:
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K J Dalton; G S Dawes; J E Patrick |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: American journal of obstetrics and gynecology Volume: 127 ISSN: 0002-9378 ISO Abbreviation: Am. J. Obstet. Gynecol. Publication Date: 1977 Feb |
Date Detail:
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Created Date: 1977-03-31 Completed Date: 1977-03-31 Revised Date: 2005-11-17 |
Medline Journal Info:
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Nlm Unique ID: 0370476 Medline TA: Am J Obstet Gynecol Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 414-24 Citation Subset: AIM; IM |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animals Circadian Rhythm Epinephrine / pharmacology Female Fetal Heart / physiology* Fetal Hypoxia / physiopathology Heart Rate* / drug effects Hypercapnia / physiopathology Neuromuscular Blocking Agents / pharmacology Pregnancy Sheep |
| Chemical | |
Reg. No./Substance:
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0/Neuromuscular Blocking Agents; 51-43-4/Epinephrine |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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