STUDIES ON APPLICATIONS OF ELECTROCARDIOGRAM IN CATTLE : THE LEAD METHOD AND ELECTROCARDIOGRAM WITH SPECIAL REFERENCE TO CONFIGURATIONS AND MEASUREMENTS OF WAVES IN LIMB LEAD, BIPOLAR CHEST LEAD I AND II, AND SEMI-UNIPOLAR CHEST LEADS
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概要
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In connection with the serial electrocardiogram recorded by means of the limb lead, bipolar chest leads I and II and semi-unipolar chest lead were obtained on one each of 40 normal dairy cattle. The data derived from the analysis of these records can be summarized as follows : 1. In the electrocardiogram of the limb lead when the left and right olecranons and left patella were chosen for the positions of lead points, the triphasic and diphasic P wave in each lead, r type of QRS complex in lead I and R type in leads II and III, and monophasic negative and positive T waves are observed, respectively. 2. In case of the use of the bipolar chest lead I in which the left and right olecranons and withers were selected for the lead points, the triphasic P wave, qR and R type of QRS complex and monophasic negative T waves were observed in each lead respectively. 3. When the bipolar chest lead II was employed using the withers, left shoulder blade and the apex of the heart on the left side for the lead points, W form of P wave in each lead, qR type in leads I and II, and qR, QR in lead III, and monophasic negative T wave in leads I and II, monophasic positive and diphasic waves in lead III were observed respectively. 4. In case of the use of the semi-unipolar chest lead, the waves in the lead at the upper portion of the heart showed negative P, and R type of QRS complex and negative T waves were also observed there. On the contrary in the lead at the apical portion of the heart, the positive P and QS type of QRS complex and positive T wave were traced. 5. On the basis of these experiments, the limb lead may not be suitable for clinical use in cattle because the variation of the electrical changes of the heart was not completely traced. The bipolar chest leads I and II, however, may be applicable for clinic use, for the variation of the electrical changes of the heart were apparentely registered on the electrocardiogram. The semi-unipolar chest lead may be of use in the diagnosis of disorders in the heart providing that different electrodes are placed close to the heart. From the findings described above, it may be considered that the use of bipolar chest leads I and II together with semi-unipolar chest lead is valuable for the clinical diagnosis of heart disorders.
- 北海道大学の論文
- 1959-01-30
著者
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NAKAMURA Ryoichi
Department of Applied Biological Science, Faculty of Science and Technology, Tokyo University of Sci
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TOO Kimehiko
Department de Medecine Veterinaire dans la meme Faculte
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Nakamura Ryoichi
Department Of Veterinary Internal Medicine Faculty Of Veterinary Medicine Hokkaido University
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HIRAO Kazuyoshi
Department of Veterinary Internal Medicine, Faculty of Veterinary Medicine, Hokkaido University
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Hirao Kazuyoshi
Department Of Veterinary Internal Medicine Faculty Of Veterinary Medicine Hokkaido University
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Nakamura Ryoichi
Department Of Applied Biological Science Faculty Of Science And Technology Tokyo University Of Scien
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TOO Kimehiko
Department of Veterinary Internal Medicine, Faculty of Veterinary Medicine, Hokkaido University
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