Strain and strain rate
Zeitschrift für Kardiologie(2004)
摘要
Strain (deformation) and strain rate (velocity of
deformation) are parameters of regional myocardial function
which can be calculated at the bedside from tissue Doppler
echocardiographic data. These parameters are less image quality
dependent and less subjective than visual assessment of
endocardial border motion, and they track myocardial deformation
with a considerably higher time resolution than magnetic
resonance imaging. Thus, the technique can document short-lived
subtle changes in deformation patterns, such as post-systolic
shortening/thickening. The ability to detect regional myocardial
ischemia and viability has been confirmed in animal experiments
and clinical studies. The technique has also been used to detect
early cardiomyopathy and to differentiate physiologic and
pathologic myocardial hypertrophy, as well as to identify
regional dyssynchrony in candidates for resynchronization
therapy. Applications in heart transplantation, right
ventricular disease and valvular heart disease are under
evaluation. Thus, strain and strain rate data offer a new window
on regional myocardial function and may, in the future, become
an integral part of echocardiographic evaluation.
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关键词
Echokardiographie,Gewebedoppler,Strain,Myokardfunktion,Ischämie,Echocardiography,tissue doppler,strain,myocardial function,ischemia
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