Studies on the physiology of work in domestic animals:III On the effects of work on the electrocardiogram of cattle

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Seven adult cows of the Japenese indigenous breed were used as experimental animals in this study. Each of them was forced to pull on the flat road a sleigh with load weighing 100, 000kgm.(moderate work) and 200, 000kgm.(heavy work), respectively. Her electrocardiogram was recorded three times, namely, immediately after and 30 and 60 minutes after the work. The control electrocardiogram was recorded before the work. In this study the lead employed was right-front-leg to anus.Principal results are summarized as follows: 1. The height of P wave seems to decrease after the work, and recover after 30 minutes in the moderate work, but it did not recover even after an hour in the heavy work. 2. The effect of work on the height of both Q and R wave was not recognized distinctly in this study. 3. After the work the height of T wave was increased in some instances and decreased in others.In a few case the T wave was inverted after the work. Then, the author could not confirm the effect of work on the height of T wave. 4. The PP interval was shortened by 0.2-0.3 minutes after the moderate work and by 0.4-0.5 minutes after the heavy one. In the moderate work it did not perfectly recover after 30 minutes and seemed to recover after an hour. In the heavy work it did not recover after 30 minutes and did not seemed to recover even after an hour. 5. The PQ interval was shortened by 0.015 minutes after the moderate work and by 0.021 minutes after the heavy one. The author could not recognize any trend in the recovering of the PQ interval after both moderate and heavy work in this study. 6. The QT interval seemed to be prolonged by 0.008 minutes after the moderate work and by 0.021 minutes after the heavy one. This interval almost recovered after 30 minutes in the moderate work, but did not perfectly recover even after an hour in the heavy work. 7. From the above-mentioned results, the author concludes that the P wave, and PP and QT inter. vals should be investigated when the electrocardiogram is used to determine the degree of fatigue and recovery from fatigue in the bovine heart after the work.
公益社団法人日本畜産学会の論文

Studies on the physiology of work in domestic animals:III On the effects of work on the electrocardiogram of cattle

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概要

公益社団法人日本畜産学会 | 論文

スポンサーリンク

Studies on the physiology of work in domestic animals:III On the effects of work on the electrocardiogram of cattle

スポンサーリンク

概要

公益社団法人 日本畜産学会 | 論文

スポンサーリンク

公益社団法人日本畜産学会 | 論文