Advances in Animal Cardiology
Online ISSN : 1883-5260
Print ISSN : 0910-6537
ISSN-L : 0910-6537
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Volume 27, Issue 1
Displaying 1-5 of 5 articles from this issue
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  • [title in Japanese]
    [in Japanese]
    1994 Volume 27 Issue 1 Pages 1-3
    Published: 1994
    Released on J-STAGE: February 25, 2010
    DOIhttps://doi.org/10.11276/jsvc1984.27.1
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1994 Volume 27 Issue 1 Pages 4-8
    Published: 1994
    Released on J-STAGE: September 17, 2009
    DOIhttps://doi.org/10.11276/jsvc1984.27.4
    JOURNAL FREE ACCESS
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  • Doppler Echocardiography in Normal Dog: Relationships Between Sampling Volume Site and Blood Flow Profile
    Toshiaki KAGEYAMA, Makoto MUTO, Yoshito WAKAO, Takuji OKAMOTO, Riho MI ...
    1994 Volume 27 Issue 1 Pages 9-18
    Published: 1994
    Released on J-STAGE: September 17, 2009
    DOIhttps://doi.org/10.11276/jsvc1984.27.9
    JOURNAL FREE ACCESS
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    Pulsed Doppler echocardiography was used to determine the differences of the blood flow velocity profiles depending on the site of sample volume. Blood flow profiles were recorded from two sites at the mitral and tricuspid valve area, and from three sites at the aortic and pulmonary valve area in 31 normal conscious dogs. It revealed that there were significant differences in peak velocities across the aortic and pulmonary valves. Ejection time recorded from aortic and pulmonary valves correlated to the heart rate. As a result, it is important to clarify the site of sample volume and heart rate in examining the blood flow velocity profiles.
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  • Computer analysis on electrocardiograms of small rodents
    I. Mouse and Rat
    Yousuke UCHIYAMA, Masayoshi KUWAHARA, Hirokazu TSUBONE, Shigeru SUGANO
    1994 Volume 27 Issue 1 Pages 19-32
    Published: 1994
    Released on J-STAGE: September 17, 2009
    DOIhttps://doi.org/10.11276/jsvc1984.27.19
    JOURNAL FREE ACCESS
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    Recently advanced computer-system enables us to measure ECG wave forms exactly even if in small rodents with rapid heart beats. The authors have investigated postnatal changes in heart rate (HR), duration or interval, amplitude, mean electrical axis of QRS complex and ST-segment of the standard limb-lead ECG in mice, rats, hamsters, mongolian gerbils, voles and guinea pigs. In the present study, the results obtained from mice and rats (anesthetized with urethane and α-chloralose) are reported. 1) The HR increased till 30th (mice) or 21st (rats) day of postnatal stage and thereafter decreased gradually till 90th day. 2) The PR and QT intervals decreased till 21st to 30th day, while QRS duration was prolonged to only minimum extent during growth. 3) The amplitude of P, R, S and T waves increased till 14th or 21th day, and then decreased gradually as age advanced. 4) The mean electrical axis of QRS complex in mice was shown predominently in the right and caudal direction (90-180°) till 5th day and thereafter the axis was shifted to the left and caudal direction (0-90°).. In the rat, the axis was shifted to the left in all individuals after the 2nd day. 5) In both species, the ST-segment was recognized at most early stages. The ST-segment disappeared on 14th day in mice. In rats it was not discernable after 21st day but the 'ST-junction' was present in some individuals.
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  • Ventricular septal defect in a cat
    Norihisa OHMIYA, Takayoshi SEKINE, Kazuo KOGURE
    1994 Volume 27 Issue 1 Pages 33-36
    Published: 1994
    Released on J-STAGE: September 17, 2009
    DOIhttps://doi.org/10.11276/jsvc1984.27.33
    JOURNAL FREE ACCESS
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    [in Japanese]
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