| 张丽,谢明星,韩伟,王新房,吕清,王静,王蕾.超声二维应变评价正常人左室扭转和径向位移的初步研究[J].中国医学影像技术,2008,24(4):531~534 |
| 超声二维应变评价正常人左室扭转和径向位移的初步研究 |
| Assessment of left ventricular twist and displacement in normal subjects by two-dimensional strain |
| 投稿时间：2007-09-28 修订日期：2008-03-07 |
| DOI： |
| 中文关键词: 超声心动描记术 二维应变 左室 心肌收缩 位移 |
| 英文关键词:Echocardiography Two-dimensional strain Left ventricular Myocardial contraction Displacement |
| 基金项目: |
| 作者 | 单位 | E-mail | | 张丽 | 华中科技大学同济医学院附属协和医院超声诊断科,湖北省分子影像重点实验室,湖北 武汉 430022 | | | 谢明星 | 华中科技大学同济医学院附属协和医院超声诊断科,湖北省分子影像重点实验室,湖北 武汉 430022 | xiemx64@yahoo.com.cn | | 韩伟 | 华中科技大学同济医学院附属协和医院超声诊断科,湖北省分子影像重点实验室,湖北 武汉 430022 | | | 王新房 | 华中科技大学同济医学院附属协和医院超声诊断科,湖北省分子影像重点实验室,湖北 武汉 430022 | | | 吕清 | 华中科技大学同济医学院附属协和医院超声诊断科,湖北省分子影像重点实验室,湖北 武汉 430022 | | | 王静 | 华中科技大学同济医学院附属协和医院超声诊断科,湖北省分子影像重点实验室,湖北 武汉 430022 | | | 王蕾 | 华中科技大学同济医学院附属协和医院超声诊断科,湖北省分子影像重点实验室,湖北 武汉 430022 | |
|
| 摘要点击次数: 3167 |
| 全文下载次数: 1042 |
| 中文摘要: |
| 目的 应用超声二维应变技术(2DS)探讨正常左室扭转及径向位移运动特征,构建左室-扭转位移环。方法 健康成人志愿者58例,取胸骨旁左室心尖和心底短轴观对各水平旋转及径向位移进行定量分析,计算左室扭转及径向位移,构建左室-扭转位移环,并记录心底部与心尖部旋转角度峰值和左室扭转角度峰值及达峰时间,收缩期及等容舒张期左室径向位移。结果 正常人扭转运动主要表现为心底部顺时针旋转和心尖部逆时针旋转,心脏整体表现为心动周期内逆时针方向为主的扭转运动。左室扭转-位移环均呈"8"字构型。收缩期及等容舒张期左室扭转与径向位移呈线性相关。结论 应用2DS技术可无创性评价正常人左室扭转及径向位移运动特征,构建左室-扭转位移环。 |
| 英文摘要: |
| Objective To assess the value of normal left ventricular twist and radial displacement by two-dimensional strain (2DS). Methods Fifty-eight healthy volunteers underwent the examination of two-dimensional ultrasound, then basal and apical short-axis images of left ventricular were acquired to analyse each image rotation and radial displacement. LV twist and radial displacement were calculated and LV twist-displacement loop was constructed. And then basal and apical left ventricular peak rotation (Prot), peak left ventricular twist (Ptw), time to Prot and Ptw, systole duration time and isovolumic relaxation time of LV radial displacement were separately measured. Results As seen from the apex, the normal LV performs a wringing motion with a clockwise rotation at the base and counterclockwise rotation at the apex. Twist-displacement loops were characterized by a figure of 8 configuration. There were a linear relation between twist and displacement during systole and isovolumic relaxation time (IVRT). The rate of twist with respect to radial displacement was determined by the slope of loop. The mean value of IVRT slope was larger than the corresponding value of the slope during systole (P＜0.05). Conclusion LV twist-displacement can be measured noninvasively by 2DS. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
|
|
|
