Evolution of the Electrocardiogram in Young Dogs during the First 180 days of Life and a Diffenence between Male and Female

Hiroyuki ISHIGURO; Kazuhiko SENNO; Mitsuru INOUE; Terumi SUKEGAWA; Hitoo YOSHIDA

doi:10.11276/jsvc1984.21.42

生後180日齢までの仔犬における心電図の変化とその性差について

石黒博之, 千野和彦, 井上満, 助川輝美, 吉田仁夫

著者情報

ジャーナルフリー

1988 年 21 巻 21 号 p. 42-47

DOI https://doi.org/10.11276/jsvc1984.21.42

詳細

発行日: 1988 年受付日: - J-STAGE公開日: 2009/09/17 受理日: - 早期公開日: - 改訂日: -
訂正情報
訂正日: 2009/09/17 訂正理由: - 訂正箇所: 論文抄録訂正内容: Wrong : Electrocardiographical changes during the first 180 days of life were compared between 46 male and 56 female beagle puppies born to the mothers having no history of heart diseases.
Electrocardiograms were recorded by the standard limb leads (I, II, III) and the augmented unipolar limb leads (aVR, aVL, aVF).
1. Electrocardiogrphic examination revealed almost no difference in both sexes.
2. The heart rate registered the maximum on the 10th day of life, and then decreased until the 180th day.
3. The variation of P wave voltage decreased to the 65th day, and then increased until the 180th day. But, the variation of T wave voltage increasied to the 37th day, and then decreased until the 180th day.
4. The variation of R wave voltage increased until the 180th day. But, the variation of S wave voltage decreased until the 180th day.
5. P wave and QRS wave duiations prolonged slightly until the 180th day.
6. P-R wave duration shortened during the period of the 30th day to the 40th day of life, and then prolooged until the 180th day. Q-T wave duration shortened until the 41st day and then prolonged until the 180th day.
7. There were 3 types of changes in QRS electrical axis from day 0 of life tgrough to the 180th day, i. e., anticlockwise (male 74%, female 70%), clockwise (male 22%, female 28%) and motionless (male 4%, female 2%).
Right : Electrocardiographical changes during the first 180 days of life were compared between 46 male and 56 female beagle puppies born to the mothers having no history of heart diseases.
Electrocardiograms were recorded by the standard limb leads (I, II, III) and the augmented unipolar limb leads (aVR, aVL, aVF).
1. Electrocardiogrphic examination revealed almost no difference in both sexes.
2. The heart rate registered the maximum on the 10th day of life, and then decreased until the 180th day.
3. The variation of P wave voltage decreased to the 65th day, and then increased until the 180th day. But, the variation of T wave voltage increasied to the 37th day, and then decreased until the 180th day.
4. The variation of R wave voltage increased until the 180th day. But, the variation of S wave voltage decreased until the 180th day.
5. P wave and QRS wave durations prolonged slightly until the 180th day.
6. P-R wave duration shortened during the period of the 30th day to the 40th day of life, and then prolooged until the 180th day. Q-T wave duration shortened until the 41st day and then prolonged until the 180th day.
7. There were 3 types of changes in QRS electrical axis from day 0 of life tgrough to the 180th day, i. e., anticlockwise (male 74%, female 70%), clockwise (male 22%, female 28%) and motionless (male 4%, female 2%).

訂正日: 2009/09/17 訂正理由: - 訂正箇所: 所属機関情報訂正内容: Wrong :
1) Lab. Of Vet. Internal medicine, Coll. Of Agr. and Vet. Med., Nihon Univ.

Right :
1) Lab. of Vet. Internal medicine, Coll. of Agr. and Vet. Med., Nihon Univ.

抄録

心疾患のない母犬から生まれた102頭のビーグル種仔犬(雄46頭,雌56頭)を供試して,生後3時間(0日齢)から180日齢までの心電図を経時的に記録し,波形の変化とその性差の有無について検討した。
心電図の記録は,標準肢誘導(I,II,III)と増高単極肢誘導(aVR,aVL,aVF)で行った。
1.両性における心電図の波形の変化は同様の傾向であったが,統計学的に有意差を断定し得なかった。
2.心拍数は生後10日齢で最高値を示し,その後180日齢まで減少の傾向を示した。
3.P波の振幅の変化は生後65日齢まで減少し,その後180日齢まで増高する傾向を示した。しかし,T波は生後37日齢まで増高し,その後180日齢まで減少した。
4.R波の振幅は生後180日齢まで増高する傾向を示した。しかし,S波の振幅は180日齢まで減少する傾向を示した。
5.P波の持続時間ならびにQRSの持続時間は生後180日齢まで軽度に延長した。
6.P-R間隔は生後30から40日齢の間まで短縮し,その後180日齢まで延長した。
Q-T間隔は生後41日齢まで短縮し,その後180日齢まで延長した。
7.生後3時間(0日齢)から180日齢までの平均電気軸の変化には,左回り(雄74%,雌70%),右回り(雄22%,雌28%),変化しないもの(雄4%,雌2%)の3つのtypeが認められた。

責任著者(Corresponding author)

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