定量组织速度成像评价心肌梗死患者左心室舒张不同步性及整体舒张功能  

Quantitative tissue velocity imaging on left ventricular diastole asynchrony in patients with myocardial infarction

作　　者：廖桂英[1] 温赐祥[1] 

机构地区：[1]广东医学院附属医院超声科,广东湛江524001

出　　处：《中国医学影像技术》2008年第S1期90-92,共3页Chinese Journal of Medical Imaging Technology

摘　　要：目的探讨应用定量组织速度成像技术(QTVI)评价心肌梗死患者左心室非同步舒张运动的意义。方法获取60例心肌梗死患者及40例正常人的标准心尖部左室长轴、两腔和四腔观组织速度图像,离线分析左心室6个壁基底段、中间段和心尖段共18个位点及左心室各壁二尖瓣环的组织速度曲线,测量心电图QRS波起始点至各位点心肌舒张早期峰值速度(Ea)的时限(TQ-E)。计算同一节段6个壁间TQ-E的最大差值(Inter-ΔTQ-E)、同一壁内3个节段间TQ-E的最大差值(Intra-ΔTQ-E)及左心室18个位点间TQ-E的最大差值(Max-ΔTQ-E)。计算左心室各壁二尖瓣环Ea与舒张晚期峰值速度(Aa)比值的平均值(Ea/Aa′)。并利用常规超声心动图测定心肌梗死患者左室整体舒张末容积(EDV)、收缩末容积(ESV)、射血分数(LVEF)。结果与正常人相比,心肌梗死组EDV、ESV均明显升高,心肌梗死组EF明显降低,心肌梗死患者的Inter-ΔTQ-E、Intra-ΔTQ-E、Max-ΔTQ-E均明显延长,Ea/Aa′明显降低。心肌梗死患者中,Max-ΔTQ-E与Ea/Aa′均呈显著负相关;与EDV及ESV呈显著正相关;与EF呈显著负相关。结论心肌梗死患者左心室同一节段、同一壁内均存在非同步舒张运动,并且其是导致左心室舒张功能不全的必要因素,定量组织速度成像技术能为心肌梗死后左室重构的心功能的评价提供客观依据。Objective To evaluate the diastole asynchrony of the different segment s of left ventricle(LV)and its relation with LV diastole function in the patient s with myocardial infarction by quantitative tissue velocity imaging(QTVI).Methods Sixty patients with myocardial infarction and 40 healthy people were studied by QTVI.The regional velocity profiles of 18 segments of LV and mitral annulus of six walls along LV apical long axis view,apical two chamber view and four chamber view were obtained.The time(TQ-E)fro...

关 键 词：定量组织速度成像 心肌梗死 心室功能 左 

分 类 号：R542.22[医药卫生—心血管疾病]