| 庞程程,任卫东,姜镔.超声二维应变成像评价正常人等容收缩期左心室局部心肌运动特点[J].中国医学影像技术,2010,26(11):2075~2078 |
| 超声二维应变成像评价正常人等容收缩期左心室局部心肌运动特点 |
| Evaluation of regional left ventricular wall motion during isovolumic contraction in normal subjects with two-dimensional strain echocardiography |
| 投稿时间：2010-01-12 修订日期：2010-07-26 |
| DOI： |
| 中文关键词: 超声心动描记术 二维应变 心室功能,左 |
| 英文关键词:Echocardiography Two-dimensional strain Ventricular function, left |
| 基金项目:辽宁省自然科学基金(20082106)。 |
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| 中文摘要: |
| 目的 应用超声二维应变成像观察正常人等容收缩期局部心肌纵向应变特点。方法 采集27名正常人心尖四腔心、两腔心和心尖左心室长轴切面的二维灰阶动态图像,应用二维应变软件获得等容收缩期应变曲线,计算等容收缩期出现正向应变(ε+IVC)曲线的心肌节段数及其检出率,分析最大负向应变(ε－IVC)、ε+IVC检出率、ε+IVC峰值在各水平(基底段、中间段和心尖段)、各室壁(后间隔、侧壁、下壁、前壁、后壁、前间隔)心肌间的差异。结果 正常人等容收缩期的应变曲线以绝对值逐渐增大的负向应变曲线最为多见,ε－IVC的绝对值从基底段至心尖段递增,后壁、后间隔、下壁均小于前壁、侧壁、前间隔,除后间隔和下壁与前间隔差异无统计学意义外,其余差异均有统计学意义(P均＜0.05)。20.89%的节段出现正向应变曲线,其中基底段心肌比心尖段心肌多见,后壁、后间隔、下壁心肌比前壁、前间隔、侧壁心肌多见,除下壁与侧壁和前间隔差异无统计学意义外,其余差异均有统计学意义(P均＜0.05)。结论 等容收缩期左心室心肌是有形变的,应用超声二维应变成像可快速、简便地检测等容收缩期心肌的形变。 |
| 英文摘要: |
| Objective To evaluate the characteristics of regional left ventricular wall strain during isovolumic contraction in normal subjects with two-dimensional strain echocardiography (2DSE). Methods Twenty-seven healthy volunteers were enrolled. 2DSE was used to record the stain-time curve of each segment of left ventricular wall during isovolumic contraction from the apical four-chamber view, two-chamber view and the left ventricular long-axis view. Left ventricular wall segmental maximum negative strain (ε－IVC), peak positive strain (ε+IVC) during isovolumic contraction and the numbers of segments in which ε+IVC appeared were studied. All the targets were compared among the ventricular levels and walls. Results There were two shapes of stain-time curve in isovolumic contraction: Gradually increasing negative wave and small positive wave. The gradually increasing negative waves were most popular and the positive small waves accounted for 20.89%. The absolute values of ε－IVC had a increasing tendency from base to apex, and the value of posterior, posteroseptal, inferior walls were less than those of anterior, lateral and anteroseptal walls. Statistical difference was found among ventricular levels and walls except posteroseptal, inferior wall and anteroseptal wall. The detection ratios of ε+IVC had a decreasing tendency from base to apex, and the ratios of ε+IVC of posterior, posteroseptal, inferior walls were higher than those of anterior, anteroseptal and lateral walls. There was statistical difference except amomg inferior and lateral, anteroseptal walls. Conclusion Left ventricular wall deformation occurs during the isovolumic contraction in normal subjects. 2DSE can be used to evaluate the characteristics of regional left ventricular wall deformation during isovolumic contraction. |
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