速度向量成像与自动左室容积对频发室性早搏局部心肌改变的临床价值  

Evaluation of Local Myocardial Change with Frequency Premature Ventricular Contractions by Velocity Vector Imaging and Left Ventricualr Analysis

作　　者：陈芸[1] 刘俐[1] 张威威[1] 罗海愉 黄珍砾[1] 杨晓东[1] 彭伟彬[2] 

机构地区：[1]北京大学深圳医院超声影像科,广东省深圳市518036 [2]广州医科大学

出　　处：《中国超声医学杂志》2016年第10期891-893,共3页Chinese Journal of Ultrasound in Medicine

摘　　要：目的运用速度向量成像技术(VVI)和自动左室容积分析(LVA)探索频发室性早搏(PVCs)对左室心肌功能的影响。方法 20例单纯性频发PVCs患者和经年龄与性别匹配的40例正常志愿者进行常规超声检查后,留存所需图像并运用VVI和LVA进行后处理,记录左室心肌短轴三个切面的整体径向收缩期峰值应变(S)、收缩后指数(PSI)、最大室壁延迟时间(MWD)、应变达峰时间的标准差(SD)以及容积参数左室射血分数(LVEF)、每搏量(SV),并进行统计分析。结果相比于正常组,异常组仅在基底段S减低、PSI增大(P<0.05),并且异常组间差异均无统计学意义。左室短轴三个切面异常组(室性心搏)MWD和SD与其他两组比较均增大(P<0.05);而异常组(窦性心搏)与正常组间差异均无统计学意义。异常组(室性心搏)LVEF和SV较其他两组均减低(P<0.05);而异常组(窦性心搏)和正常组间差异均无统计学意义。结论 VVI和LVA在PVCs中均具有一定临床价值。VVI能够早期发现心肌隐匿性损伤及心室同步性异常,而LVA能够解释心肌功能受损的原因。Objective To explore the impact of left ventricular myocardial function with frequency premature ventricualr contractions（PVCs） by velocity vector imaging（VVI） and left ventricular analysis（LVA）. Methods Conventional ultrasound was used to check 20 patients with simple frequency PVCs and 40 normal volunteers matched by age and gender, and it was that the post-processing of the needed images by VVI and LVA. Then record the indicators of left ventricular myocardial short axis three aspects： globe radial peak systolic strain （S）, post systolic index （PSI）, max wall delay （MWD）, the standard deviation of the time of peak strain（SD） and volume parameters： left ventricular ejection fraction （LVEF）, stroke volume （SV）. Finally analyze dates. Results Compared with normal group, abnor mal group S reduced, PSI increased only in left ventricular short axis basal segment （P〈0.05）, and not between abnormal groups. Abnormal group （ventricular cardiac） MWD and SD were both increased compared the other two groups （P〈0.05） in left ventricular three short axis, but not between abnormal group （sinus cardiac） and normal group. Abnormal group （ventricular cardiac） LVEF and SV were lower than the other two groups （P〈0.05） ; there were no statistically significant difference between normal group and abnormal groups （sinus cardiac）. Conclusions VVI and LVA have certain values in PVCs. VVI can find myocardial occult injury and synchronicity, and LVA explains the reason of myocardial dysfunction.

关 键 词：速度向量成像技术 自动左室容积分析 室性早搏 

分 类 号：R445.1[医药卫生—影像医学与核医学] R541.7[医药卫生—诊断学]