速度向量成像技术对正常胎儿心肌运动的评价及其意义  

Assessment of myocardial performance in fetuses by velocity vector imaging

作　　者：夏珣[1,2] 余艳红[1] 李胜利[2] 郭飞燕[1] 王晨虹[3] 廖玉媚[2] 

机构地区：[1]南方医科大学南方医院妇产科,广州510515 [2]南方医科大学附属深圳市妇幼保健院超声科 [3]南方医科大学附属深圳市妇幼保健院妇产科,广东深圳518028

出　　处：《中国临床解剖学杂志》2010年第6期655-658,共4页Chinese Journal of Clinical Anatomy

基　　金：国家科技支撑计划项目(2006BAI05A04)

摘　　要：目的探讨速度向量成像技术(VVI)在评价胎儿室壁心肌功能中的作用及其影响因素。方法通过Syngo US Workplace VVI工作站处理标准胎儿四腔心动态图(147例),分别获得左、右心室四腔心观心内膜VVI图,以及左、右心室纵向6个节段的速度、应变、应变率的测值并进行分析。结果 (1)左、右心室的速度分布由基底段向心尖逐渐减小(P<0.05),其6个节段和整体的应变、应变率的差异无统计学意义(P>0.05)。(2)左、右心室的速度和孕周呈正相关(左心室r=0.662,P<0.05;右心室r=0.732,P<0.05),整体应变、应变率和孕周无显著相关性(P>0.05)。(3)左、右心室整体应变率和胎心率呈正相关(左心室r=0.454,P<0.05;右心室r=0.465,P<0.05),其应变和速度均和胎心率无显著相关性(P>0.05)。结论 VVI技术可应用于胎儿整体和局部心肌运动和功能的分析评估。Objective To investigate the application and the influencing factors of velocity vector imaging for evaluating of myocardial mechanics in the normal fetal ventricles.Methods Two-dimensional 4-chamber images of the heart（n=147） were interrogated offline using Syngo US Workplace VVI software.Measurements of global and segmental longitudinal velocity,strain,and strain rate were performed on the right and left ventricle.Comparison was made between each segmental and global measurement respectively.The correlation of above measurements with gestational weeks and fetal heart rate was analyzed.Results（1） The left and right ventricular velocities decreased from the base to the apex segment（P〈0.05）.The strain and strain rate showed no significant difference among global and each segmental measurement（P〉0.05）.（2） The global velocities had significant positive correlation with increasing gestational week（left ventricle r=0.662,P〈0.05;right ventricle r=0.732,P〈0.05）.The strain and strain rate had no significant correlation with gestational age（P〉0.05）.（3） There was significant correlation between the global strain rate and fetal heart rate（left ventricle r=0.454,P〈0.05;right ventricle r=0.465,P〈0.05）.The strain and velocity had no significant correlation with the fetal heart rate（P〉0.05）. Conclusions VVI is a newly technique for quantitating global and segmental fetal cardiac function.

关 键 词：胎儿 心脏 速度向量成像 超声 

分 类 号：R322.11[医药卫生—人体解剖和组织胚胎学] R445.1[医药卫生—基础医学]