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Volume 39, Number 2-4 >

ELECTROCARDIOGRAPHIC FINDINGS DURING PARTURITION AND BLOOD GAS TENSIONS IMMEDIATELY AFTER BIRTH IN THOROUGHBRED FOALS

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Please use this identifier to cite or link to this item:http://doi.org/10.14943/jjvr.39.2-4.143

Title: ELECTROCARDIOGRAPHIC FINDINGS DURING PARTURITION AND BLOOD GAS TENSIONS IMMEDIATELY AFTER BIRTH IN THOROUGHBRED FOALS
Authors: YAMAMOTO, Keiji Browse this author
YASUDA, Jun Browse this author
TOO, Kimehiko Browse this author
Keywords: Arrhythmia
Blood gas
Equine
newborn
Parturition
Issue Date: 26-Dec-1991
Publisher: The Graduate School of Veterinary Medicine
Journal Title: Japanese Journal of Veterinary Research
Volume: 39
Issue: 2-4
Start Page: 143
End Page: 157
Abstract: In 101 newborn Thoroughbred foals and foaling mares, 45 fetal (FECGs) and 101 neonatal electrocardiograms (NECGs) were obtained to investigate neonatal arrhythmias and other parameters including changes in fetal (FHR) and neonatal heart rate (NHR). Moreover, umbilical arterial, venous and jugular venous blood gas tensions and pH immediately after birth were analyzed to compare with the type and the degree of neonatal arrhythmias. Before delivery, in 37 fetuses FHR gradually decreased while in 8 cases it increased after rupture of the chorio-allantois. Abnormal deliveries were related in 5 of the 8 cases. In foals born with sinus rhythm, NHR at birth was 22 beats per minute higher than the FHR immediately before birth, gradually decreased for 1-2 min and then increased. Various types of neonatal arrhythmias and their combinations were recorded in 92 of the 101 NECGs. No arrhythmias demonstrated in NECGs were detected in the FECGs. The mean values for umbilical arterial pH, Pco_2 and Po_2 indicated that newborn foals at birth were exposed to hypoxemic, hypercapnic and acidemic conditions. The relationship between the umbilical arterial Po_2 value as an indicator of the degree of hypoxemia of the foal and the type of arrhythmias was not apparent. However, the Po_2 value in the group with severe arrhythmias was comparatively lower than that in the group with mild arrhythmias. It was suggested that hypoxemia played an important role in neonatal arrhythmias.
Type: bulletin (article)
URI: http://hdl.handle.net/2115/8938
Appears in Collections:Japanese Journal of Veterinary Research > Volume 39, Number 2-4

Submitter: 獣医学部図書室

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