Myocardial function assessed by two-dimensional speckle-tracking echocardiography in dogs with experimentally induced chronic afterload
2015
Suzuki, R. (Nippon Veterinary and Life Science University, Musashino-shi, Tokyo (Japan). Faculty of Veterinary Medicine, Department of Veterinary Clinical Medicine, Division of Therapeutic Sciences 1, Laboratory of Veterinary Internal Medicine) | Mochizuki, Y. | Yoshimatsu, H. | Okunaka, R. | Katagiri, N. | Hamano, M. | Ueno, S. | Teshima, T. | Matsumoto, H. | Koyama, H.
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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