摘要
目的 应用速度向量成像技术（velocity vector imaging,VVI）评价扩张型心肌病（dilated cardiomyopathy,DCM）径向局部心肌收缩功能和同步性.方法 16例DCM患者和20例对照者进行超声心动图检查,脱机分析左室短轴观中6个基底节段和6个中间节段共12个节段的径向收缩期峰值速度（V）、应变（ε）、应变率（SR）、径向速度达峰时间（PTV）、应变达峰时间（PTε）,计算12节段的最早与最晚速度达峰时间差值（T-max）及速度达峰时间标准差（T-SD）.结果 ①DCM组各节段的V、ε、SR的平均值均显著低于对照组相应节段（P＜0.01）;②DCM组的PTV除乳头肌水平前间隔及后间隔外,其余节段均大于对照组（P＜0.05）,PTε除前间隔二尖瓣水平、乳头肌水平和后间隔二尖瓣水平、乳头肌水平外,其余节段均显著延长（P＜0.05）;③DCM组的T-max及T-SD显著大于对照组（P＜0.05）.结论 VVI能检出DCM患者的左室壁径向运动异常,为评价局部心肌运动提供更多信息.
Objective To assess the radial systolic function of left ventricle（LV） in patients with dilated cardiomyopathy（DCM） by velocity vector imaging（VVI）.Methods Sixteen patients with DCM and twenty control subjects were detected by VVI.VVI data were collected from the six basal segments and six mid segments in parastenal LV short axis views.The radial systolic velocity（V） ,strain（ε） ,strain rate（SR）,the time to peak systolic velocity（PTV） and the time to maximum strain（PTε） were measured with special software.The differene of the earliest and the latest time to peak velocity（T-max） and the standard deviation of time to peak velocity（T-SD） of 12 segments were calculated.Results Compared to the controlled group,patients with DCM had significantly lower radial V,ε and SR （P 〈0.01） in all the 12 segments,significantly longer PTV and PTε （P 〈 0.05） in most segments, and significantly larger T-max and T-SD （P 〈0.05）.Conclusions VVI is useful to assess the abnormalities in LV radial movement in patients with DCM and could provide more information about regional cardiac function.
出处
《中华超声影像学杂志》
CSCD
北大核心
2010年第6期480-484,共5页
Chinese Journal of Ultrasonography
关键词
超声心动描记术
心肌病
扩张型
心室功能
左
速度向量成像
Echocardiography
Cardiomyopathy, dilated
Ventricular function, left
Velocity vector imaging
