双多普勒组织成像技术同步评价室间隔左右肌带运动特征  

Synchronous assessment of mechanical charaterization of left and right myocardial band of interventricular septum by dual Doppler tissue imaging

作　　者：陈玲玲[1] 尹立雪[1] 

机构地区：[1]四川省医学科学院·四川省人民医院超声医学研究所,成都610072

出　　处：《中华超声影像学杂志》2013年第8期645-649,共5页Chinese Journal of Ultrasonography

基　　金：国家自然科学基金资助项目（30970698）

摘　　要：目的评价正常成年人室间隔（IVS）左、右侧肌带纵向收缩舒张运动特征及其差异。方法应用双多普勒组织成像技术获得正常成人前后室间隔左右侧肌带基底段、中间段和心尖段的心肌纵向运动曲线，测量等容收缩期峰值速度（V-vc）、射血期峰值速度（Vs）、舒张早期峰值速度（Ve）及舒张晚期峰值速度（Va），计算双侧肌带速度梯度（MVG）和各节段re／Va值。结果①肌带峰值速度：前后室间隔右侧肌带VzvC、Vs、Ve、Va大于左侧；前后室间隔双侧肌带V-vc、Vs、Ve、Va由基底向心尖逐渐变小；前室间隔的双侧肌带Vzvc、Vs大于后室间隔，前室间隔的双侧肌带Ve、Va小于后室间隔；②肌带峰值速度相关性及相应梯度分析：前后室间隔双侧肌带的整体及节段收缩及舒张峰值速度均呈正相关；前后室间隔收缩及舒张期中间段一心尖段MVG大于基底段一中间段MVG。结论正常成年人心脏室间隔左右侧肌带心肌纵向舒缩运动具有峰值速度及局部心肌顺应性分布不均质、运动方向一致性和速度大小正相关性的特征。Objective To reveal the potential different longitudinal motion characteristics and differences of left and right muscular band （L-MB, R-MB）of interventricular septum （IVS） during systole and diastole in normal subjects. Methods Dual Doppler tissue imaging was applied for the longitudinal velocity curves of L-MB and R-MB of anterior and posterior interventricular septum（P-IVS, A-IVS） at basal,mid,and apical levels in eighty-two healthy subjects. Peak isovolumetric contraction（Vivc）, systolic （Vs）, early（Ve）and late （Va） diastolic velocities were measured, and myocardial velocity gradient（MVG） and Ve/Va ratio of each segment of L-MB and R-MB were calculated. Results OPeak velocity of MB;the Vlvc,Vs,Ve and Va of R-MB of both A-IVS and P-IVS were higher than those of L-MB;the Vivc, Vs, Ve and Va were gradually decreased from the base to apex of both A-IVS and P-IVS;the Vivc and Vs of A-IVS were higher than those of P-IVSithe Ve and Va of A-IVS were lower than those of P-IVS. QCorrelation and MVG analyses of peak velocity of MB：the systolic and diastolic velocities between L-MB and R-MB of both A-IVS and P-IVS have shown a very strong positive correlation; the isovolumetric systolic MVG1 of L-MB of A-IVS,systolic MVG1 of R-MB of P-IVS and the diastolic MVGI of both A-IVS and P-IVS were higher than those of MVG2. Conclusions The heterogeneity of longitudinal peak systolic and diastolic velocity and regional myocardial compliance, the consistency of moving direction and positive correlation of longitudinal peak systolic and diastolic velocity between L-MB and R-MB of both A-IVS and P-IVS have been demonstrated in normal subjects.

关 键 词：超声心动描记术 室间隔 肌带 双多普勒组织成像 

分 类 号：R445.1[医药卫生—影像医学与核医学]