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Volume 15, Number 1 >

FETAL AND MATERNAL ELECTROCARDIOGRAMS DURING PARTURITION IN A MARE

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Please use this identifier to cite or link to this item:http://doi.org/10.14943/jjvr.15.1.5

Title: FETAL AND MATERNAL ELECTROCARDIOGRAMS DURING PARTURITION IN A MARE
Authors: TOO, Kimehiko Browse this author
KANAGAWA, Hiroshi Browse this author
KAWATA, Keiichiro Browse this author
Issue Date: Mar-1967
Publisher: The Graduate School of Veterinary Medicine
Journal Title: Japanese Journal of Veterinary Research
Volume: 15
Issue: 1
Start Page: 5
End Page: 13
Abstract: Fetal, maternal and newborn electrocardiograms were studied on a seven-year-old mare during the entire course of normal parturition. A summary of the results is as follows : 1) The fetal heart rate indicated 60〜66 beats per minute before the onset of parturition, and it declined a little with the commencement of the first stage of labor, keeping a level of 54〜60 until the fetus was expelled. The heart rate of the newborn foal increased rapidly, ranging 108〜216. These values of the newborn corresponded to about 2〜4 times those before expulsion. 2) Throughout the whole course of parturition, the maternal heart rate was generally stable with a range of 48〜60,but arrhythmia was sometimes observed especially at later stages of parturition. This arrhythmia was characterized by incomplete A-V block. 3) After when the fetal head was exposed, fetal Q-Q intervals become highly irregular. 4) Characteristic changes of the pattern of fetal QRS were recognized at respective labor stages during parturition : Rs type before the onset of labor pains, types of qRS, Rs and QR from the commencement of the first stage of labor to 2 minutes before rupture of the amniotic sac, and Qr type immediately before the rupture. Relationships between these types of fetal QRS and fetal positions in the uterus were also discussed from the viewpoint of obstetrical use of ECG during parturition of the horse.
Type: bulletin (article)
URI: http://hdl.handle.net/2115/1861
Appears in Collections:Japanese Journal of Veterinary Research > Volume 15, Number 1

Submitter: 獣医学部図書室

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