定量组织速度成像对正常人室壁运动的研究

目的：观察正常人左室壁的运动特征，探讨定量组织速度成像（QTV）技术评价心肌运动的应用价值。方法：应用QTVI技术及8点法对40例正常人左室每一室壁的运动速度进行测定分析。结果；正常人每个心动周期中，室壁运动速度曲线均包括收缩波（S）、快速充盈波（E）和左室收缩充盈波（A）三个主要运动波，以及等容舒张波（IR）和等容收缩波（IC）。一般说来，左室同一水平游离壁的运动速度大于室间隔的运动速度，同一室壁由基底部向心尖部，运动速度逐渐降低。结论：正常人室壁运动速度存在特有的不均一性，QTVI对评价局部心肌运动功能具有很好的应用价值。

Studies of Left Ventricular Wall Motion by Quantitative Tissue Velocity Imaging

Objective To observe the left ventricular wall motion features of normal subjects using the quantitative tissue velocity imaging(QTVI) and eight points method, we evaluated the practical value of QTVI. Methods To measure the segmental left ventricular wall motion velocity of 40 normal subjects using QTVI. Results We found the left ventricular wall motion curve was made of the systolic(S), early diastolic(E), atria contraction(A), isovolumic relaxation(IR)and isovolumic contraction(IC) during every cardiac cycle. In general, the velocity of left ventricular dissociative wall was higher than that of septum, the same wall had the highest velocity at the basal segment, and the smallest velocity at the apical segment. Conclusion The left ventricular wall motion velocity of normal was not equation to every segment. QTVI had the practical value in regional myocardial motion function evaluation.