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Assessment of Left Ventricular radial Deformation by Speckle Tracking Imaging

Journal of Huazhong University of Science and Technology(Medical Sciences) 2009年第5期29卷 669-672页

作者：潘敏罗浩 Ashraf Muhammad Schultheis Judy 李小葵 David J. Sahn Department of Ultrasound Peking University Shenzhen Hospital Tongji Medical College Huazhong University of Science and Technology The Cardiac Fluid Dynamics and Imaging Lab Oregon Health & Science University

The left ventricular radial strain in the inner and outer layers was evaluated by using two-dimensional speckle tracking imaging （2DS）. Twenty-five piglets were studied. The short axis views were acquired. Peak systolic radial strain was measured from 6 circumferential points related to 6 standard segments in the inner and outer layers respectively using 2DS methods. The peak positive first derivative （dp/dt） of left ventricular pressure was compared to the radial strain from 2DS. The inner band showed higher peak radial strain values as compared to the outer band at all of the segments （P〈0.0001）, but the differences had significance just in anteroseptal, posterior, inferior and septal segments （P〈0.05）. Good correlation could be found between radial strain of inner and outer layers and peak dp/dt （P〈0.001）. These preliminary results showed that the degree of local deformation or wall thickening of the ventricular wall in its inner layer was more obvious than its outer layer. It is suggested that the 2DS technique is useful and sensitive for better understanding the regional and global myocar- dial motion and its relationship to the complex architecture of myocardium.

关键词： echocardiography speckle tracking imaging strain, radial

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