摘要
目的应用速度向量显像技术探讨正常人左心室心肌各向应变的特征,包括内膜和外膜的长轴应变、环向应变以及径向应变、横向应变。方法对25名健康志愿者行常规超声心动图检查,采集二尖瓣水平、乳头肌水平、心尖水平短轴观以及心尖四腔心、三腔心、二腔心长轴观二维图像。脱机分析,从短轴图像得到二尖瓣水平、乳头肌水平和心尖水平内膜、外膜的环向应变和径向应变的收缩期峰值,从长轴图像上得到基底段、中间段和心尖段内膜、外膜的长轴应变和横向应变的收缩期峰值。结果正常人应变存在心底-心尖梯度。外膜长轴应变自心底向心尖递减,内膜环向应变自心底向心尖递增。正常人应变存在内膜-外膜跨壁梯度。结论速度向量显像技术能够无创、简便地全面评价心室局部心肌功能。
Objective To investigate all the normal strains of left ventricular, including circumferential strain, longitudinal strain of both endocardium and epicardium and radial strain and transverse strain with velocity vector imaging （VVI）. Methods Twenty-five healthy subjects were enrolled. Two-dimensional standard echocardiography was performed and analyzed with Siemens Sequoia C 512 echocardiography imaging system and Syngo WorkPlace station Velocity Vector Imaging 2：0 version. Systolic peak circumferential strain, radial strain of endocardium and epicardium in mitral level, papillary level and apical level were acquired from short-axis views, systolic peak longitudinal strain and transverse strain from long-axis views were obtained. Results Base-apex gradient of strains appeared with epicardial longitudinal strain decreasing from base to apex and endocardial circumferential strain increasing toward apex, while endo-epicardium gradient of strains appeared in healthy subjects. Conclusion VVI can provide an overall picture of regional systolic function noninvasively and conveniently.
出处
《中国医学影像技术》
CSCD
北大核心
2009年第4期598-600,共3页
Chinese Journal of Medical Imaging Technology
关键词
超声心动描记术
心室功能
左
应变
速度向量成像
Echocardiography
Ventricular function, left
Strain
Velocity vector imaging
