FETAL ELECTROCARDIOGRAM IN DAIRY CATTLE : V FINDINGS AT PARTURITION
スポンサーリンク
概要
- 論文の詳細を見る
This experiment was attempted to obtain electrocardiographical information about fetal and maternal heart activities during and after parturition in dairy cattle. Six pregnant cows were submitted to this experiment. The results are summarized as follows : 1) In 4 cases of normal parturition, the change in fetal heart rate was not so great before rupture of the bag, but after rupture a marked fall of fetal heart rate was characteristic in all cases at approximately the middle of the stage of expulsion. While, one of 2 cases with prolongation of the expulsion stage due to weak labor pains, showed a gradual increasing tendency of the heart rate until the middle of the stage of expulsion, and showed an alternate increase and decrease until termination of expulsion. 2) In the majority of cases, the heart rate of newborns was rapidly accelerated after expulsion and maintained a higher level for 10〜50 minutes post-partum. No irregular QRS of the newborn was observed. 3) A reversal change of the fetal QRS, Rs〓rSr', was observed before rupture of the bag in 2 cases. After rupture, however, the pattern always showed Rs type only. 4) Fetal arrhythmia such as sinus bradycardia was recorded within several seconds before and/or after rupture. Fetal arrhythmia was generally observed immediately after or prior to maternal electromyograms, thus it seemed to be related to attacks of labor. 5) Variation of the maternal heart rate was smaller than that of fetal one throughout the whole course of parturition. Slight elevation of the maternal heart rate was recorded at the terminal stage of parturition.
- 北海道大学の論文
著者
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Inoue Tadahiro
Department Of Veterinary Obstetrics Faculty Of Veterinary Medicine Hokkaido University
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Inoue Tadahiro
Departement D'obstetrique Faculte De Medecine Veterinaire Universite Du Hokkaido
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KANAGAWA Hiroshi
Department of Theriogenology, Faculty of Veterinary Medicine, Hokkaido University
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TOO Kimehiko
Department de Medecine Veterinaire dans la meme Faculte
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KAWATA Keiichiro
Department of Veterinary Obstetrics Faculty of Veterinary Medicine Hokkaido University
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ODAJIMA Takeshi
Department of Veterinary Obstetrics Faculty of Veterinary Medicine Hokkaido University
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Too Kimehiko
Department Of Veterinary Internal Medicine Faculty Of Veterinary Medicine Hokkaido University
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Kanagawa Hiroshi
Department Of Biomedical Science Ontario Veterinary College University Of Guelph
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Kanagawa Hiroshi
Department Of Veterinary Obstetrics Faculty Of Veterinary Medicine Hokkaido University
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Odajima Takeshi
Department Of Oral Biochemistry School Of Dentistry Health Sciences University Of Hokkaido
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KAWATA Keiichiro
Department of Veterinary Obstetrics and Gynecology, Rakuno Gakuen University
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