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应变和应变率是定量评价心肌功能的新指标,具有不易受周围心肌的牵拉和心脏整体运动的影响的优点。超声心动图技术是分析心肌应变和应变率重要的无创技术。各种超声技术分析心肌应变及应变率的原理互不相同,综合运用这些超声技术可以在各个方向对各部位的心肌从整体到局部进行应变和应变率的定量分析。
Strain and strain rates are new indicators of quantitative assessment of cardiac function and have the advantage of being less susceptible to pulling of the surrounding myocardium and to the overall movement of the heart. Echocardiography is an important noninvasive technique for analyzing myocardial strain and strain rates. A variety of ultrasonic techniques to analyze the theory of myocardial strain and strain rate are different from each other. The comprehensive application of these ultrasonic techniques can quantitatively analyze the strain and strain rate of the myocardium from the whole to the local in all directions.