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Published in: BMC Cardiovascular Disorders 1/2011

Open Access 01-12-2011 | Research article

Assessment of left ventricular regional function in affected and carrier dogs with duchenne muscular dystrophy using speckle tracking echocardiography

Authors: Hiroshi Takano, Yoko Fujii, Naoko Yugeta, Shinichi Takeda, Yoshito Wakao

Published in: BMC Cardiovascular Disorders | Issue 1/2011

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Abstract

Background

Two-dimensional speckle tracking echocardiography (STE) is a relatively new method to detect regional myocardial dysfunction. To assess left ventricular (LV) regional myocardial dysfunction using STE in Duchenne muscular dystrophy model dogs (CXMDJ) without overt clinical signs of heart failure.

Methods

Six affected dogs, 8 carrier dogs with CXMDJ, and 8 control dogs were used. Conventional echocardiography, systolic and diastolic function by Doppler echocardiography, tissue Doppler imaging (TDI), and strain indices using STE, were assessed and compared among the 3 groups.

Results

Significant differences were seen in body weight, transmitral E wave and E' wave derived from TDI among the 3 groups. Although no significant difference was observed in any global strain indices, in segmental analysis, the peak radial strain rate during early diastole in posterior segment at chordae the tendineae level showed significant differences among the 3 groups.

Conclusions

The myocardial strain rate by STE served to detect the impaired cardiac diastolic function in CXMDJ without any obvious LV dilation or clinical signs. The radial strain rate may be a useful parameter to detect early myocardial impairment in CXMDJ.
Appendix
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Metadata
Title
Assessment of left ventricular regional function in affected and carrier dogs with duchenne muscular dystrophy using speckle tracking echocardiography
Authors
Hiroshi Takano
Yoko Fujii
Naoko Yugeta
Shinichi Takeda
Yoshito Wakao
Publication date
01-12-2011
Publisher
BioMed Central
Published in
BMC Cardiovascular Disorders / Issue 1/2011
Electronic ISSN: 1471-2261
DOI
https://doi.org/10.1186/1471-2261-11-23

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