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

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

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JOURNAL FREE ACCESS

1988 Volume 21 Issue 21 Pages 42-47

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

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Published: 1988 Received: - Available on J-STAGE: September 17, 2009 Accepted: - Advance online publication: - Revised: -
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Date of correction: September 17, 2009 Reason for correction: - Correction: ABSTRACT Details: 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%).

Date of correction: September 17, 2009 Reason for correction: - Correction: AFFILIATION Details: 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.

Abstract

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%).

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