Advances in Animal Cardiology
Online ISSN : 1883-5260
Print ISSN : 0910-6537
ISSN-L : 0910-6537
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Volume 48, Issue 1
Displaying 1-4 of 4 articles from this issue
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  • Myocardial Function Assessed by Two-Dimensional Speckle-Tracking Echocardiography in Dogs with Experimentally Induced Chronic Afterload
    Ryohei SUZUKI, Yohei MOCHIZUKI, Hiroki YOSHIMATSU, Rei OKUNAKA, Norika ...
    2015 Volume 48 Issue 1 Pages 1-8
    Published: 2015
    Released on J-STAGE: September 04, 2015
    DOIhttps://doi.org/10.11276/jsvc.48.1
    JOURNAL FREE ACCESS
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    We hypothesized that chronic afterload may reduce myocardial function, and that two-dimensional speckle-tracking echocardiography (2D-STE) could quantitatively evaluate myocardial function. Five canine models with experimentally induced chronic afterload (aortic binding) were used. Dogs were examined for systolic myocardial deformations using 2D-STE prior to and 3 and 6 months after chronic afterload induction. We evaluated the peak systolic strain and strain rate in the longitudinal, circumferential, and radial directions. Only the longitudinal strain rate was reduced at 3 month. Longitudinal deformation by 2D-STE may provide more detailed assessment of myocardial function in dogs with chronic afterload.
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  • Overdose Ingestion of Pimobendan in a Dog
    Tsuyoshi TOKURIKI, Yuichi MIYAGAWA, Naoyuki TAKEMURA
    2015 Volume 48 Issue 1 Pages 21-28
    Published: 2015
    Released on J-STAGE: September 04, 2015
    DOIhttps://doi.org/10.11276/jsvc.48.21
    JOURNAL FREE ACCESS
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    A 15-year-old castrated male Shih Tzu (weight 8.5 kg) with myxomatous mitral valve disease ingested 8.24 mg/kg of pimobendan (approximately 33 times the recommended dose). On presentation, tachycardia and systemic hypertension were observed. Echocardiography revealed systolic anterior motion of the mitral valve (SAM) and increased fractional shortening. Electrocardiography revealed an increased T wave to R wave amplitude ratio (T/R). SAM disappeared 12 hr after hospitalization. T/R normalized after 24 hr, although the mechanism of the increase in this ratio and its clinical significance remain unclear. Systemic hypertension disappeared 36 hr after hospitalization. These findings suggest that it is necessary to monitor T/R, SAM, and systemic hypertension in dogs who have ingested a large amount of pimobendan.
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