血流向量成像定量评价急性心肌梗死患者等容收缩期左心室涡流  

Quantitative assessment for the vortex of left ventricular during isovolumic contraction phase in acute myocardial infarction patients with vector flow mapping

作　　者：刘蕊[1] 纳丽莎[2] 刘丽文[3] 马斌[3] 郭建英[3] 

机构地区：[1]宁夏医科大学研究生院,宁夏银川750004 [2]宁夏医科大学附属医院心功能检查部,宁夏银川750004 [3]第四军医大学西京医院超声诊断科,陕西西安710032

出　　处：《中国医学影像技术》2012年第1期97-100,共4页Chinese Journal of Medical Imaging Technology

基　　金：陕西省社发攻关计划项目(2010K15-01-01)

摘　　要：目的应用血流向量成像(VFM)技术分析急性心肌梗死(AMI)患者等容收缩期左心室内血液流场的特点。方法选择AMI患者25例和正常志愿者40名,采集两组心尖三腔心切面彩色血流动态图像,应用VFM分析软件测量等容收缩期左心室内涡流横径、纵径,涡流的横向、纵向相对位置及其最大向量速度、涡流强度等指标,比较上述两组各参数。结果与正常志愿者比较,AMI患者等容收缩期涡流纵径增大(P<0.05),横向位置更靠近后侧壁,最大向量速度、涡流强度均减低(P<0.05)。结论等容收缩期AMI患者左心室内涡流纵径、横向位置、最大向量速度、涡流强度与正常人相比存在差异,涡流形态、位置发生改变。VFM为评价心腔内血液流场特征提供了新的途径。Objective To observe the characteristics of the vortex in left ventricular（LV） isovolumic contraction phase in patients with acute myocardial infarction（AMI） and normal subjects with vector flow mapping（VFM）.Methods Twenty-five AMI patients and 40 normal subjects were examined with two-dimensional echocardiography.The apical three-chamber color Doppler images were acquired.The vortex longitudinal length,horizontal length,transverse position,vertical position,maximum speed and strength of vortex in LV during isovolumic contraction phase were measured with VFM software.The differences of AMI patients and normal persons were compared.Results In isovolumic contraction phase,longitudinal diameter was longer in AMI patients than in normal persons（P0.05）,transverse position was closer to inferior infarction of heat,while vortex maximum speed and strength of vortex were lower（P0.05）.Conclusion Vortex longitudinal length,transverse position,maximum speed,vortex flow,strength of vortex are different between normal persons and AMI patients,and the shape and position of vortex are changed.VFM may serve as a new approach to estimate hemodynamics of heart.

关 键 词：超声心动描记术 血流向量成像 心肌梗死 涡流 

分 类 号：R540.45[医药卫生—心血管疾病] R542.22[医药卫生—内科学]