| 张轶,陈红天,龙湘党,敖琨,谢娟娟.速度矢量成像技术评估儿童左心室扭转-位移环特点[J].中国医学影像技术,2012,28(12):2163~2166 |
| 速度矢量成像技术评估儿童左心室扭转-位移环特点 |
| Assessment of the changing characteristics of left ventricular twist-displacement loop in children with velocity vector imaging |
| 投稿时间：2012-05-26 修订日期：2012-11-05 |
| DOI： |
| 中文关键词: 速度矢量成像 左心室扭转 短轴位移 儿童 |
| 英文关键词:Velocity vector imaging Left ventricular twist Radial displacement Child |
| 基金项目: |
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| 中文摘要: |
| 目的 应用速度矢量成像(VVI)技术观察正常儿童左心室扭转-位移环随年龄增长的变化特点。方法 使用二维超声心动图采集73名3~14岁健康儿童左心室心尖和心底短轴切面图,以VVI软件脱机分析各切面的左心室扭转运动和短轴位移,比较不同年龄组(3~6、7~10、11~14岁)扭转-位移环的特点。结果 左心室扭转-位移环呈8字形结构,收缩期的扭转和位移呈线性关系,其斜率随年龄增加而逐渐增大。在舒张早期,伴随解旋出现的径向扩张位移相对较小,导致各组的扭转-位移关系曲线较为陡直;在舒张中晚期,随着径向扩张位移的逐渐增大,扭转-位移环曲线趋向平坦。结论 VVI能有效、无创评价左心室扭转-位移环随年龄的改变;根据扭转-位移环评价儿童左心功能时,需考虑年龄因素的影响。 |
| 英文摘要: |
| Objective To assess the changing characteristics of left ventricular (LV) twist-displacement loop of children with velocity vector imaging (VVI). Methods Basal and apical LV short-axis images were acquired in 73 healthy children (aged 3 to 14 year-old) with 2-dimensional echocardiography. Then VVI software was used to analyze LV twist motion and radial displacement at each plane off-line. The characteristics of left ventricular twist-displacement loop were compared among different aging groups (3-6, 7-10, 11-14 year-old). Results The LV twist-displacement loop was like the configuration of "8". There was linear relation between twist and displacement during systole, and the slope increased gradually with advancing age. During early diastole, the relatively small radial expand displacement appeared with untwisting, resulting in a much steeper twist-displacement relationship curve in each group, which became smooth gradually when the radial expand displacement increased during mid to late diastole. Conclusion VVI can be used to effectively and noninvasively assess LV twist-displacement loop changing with aging. The impact of aging must be taken into account when evaluating LV function of children by the twist-displacement loop. |
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