Advances in Animal Cardiology
Online ISSN : 1883-5260
Print ISSN : 0910-6537
ISSN-L : 0910-6537
Myocardial Function Assessed by Two-Dimensional Speckle-Tracking Echocardiography in Dogs with Experimentally Induced Chronic Afterload
Ryohei SUZUKI, Yohei MOCHIZUKI, Hiroki YOSHIMATSU, Rei OKUNAKA, Norikazu KATAGIRI, Mayu HAMANO, Satoko UENO, Takahiro TESHIMA, Hirotaka MATSUMOTO, Hidekazu KOYAMA
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Keywords: aortic stenosis, canine, myocardium, pressure overload, strain
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2015 Volume 48 Issue 1 Pages 1-8

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Abstract

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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© 2015 by Japanese Society of Veterinary Cardiology
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Advances in Animal Electrocardiography

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