超声斑点追踪显像评价心肌梗死患者左心室整体收缩功能的研究

摘要

Objective To evaluate the global contractile function of the left ventricle (LV) by speckle tracking imaging (STI) in patients with myocardial infarction (MI), in order to determine the feasibility of evaluation of LV funtion with mitral annular displacement (MAD).Methods The systolis parameters including longitudinal strain (GLs) ,circumferential strain (GCs) and MAD were obtained using STI and LV ejection fraction (LVEF) was acquired by three-dimensional echocardiography in control group and MI group,and the correlation between these parameters and LVEF was analyzed respectively.Results The parameters in MI group were significantly lower than those in the control group(P ＜0.01).GLs was the independent predictors of LVEF in control group and MI group.A good correlation was showed between MADin control group and MI group (r = 0.84, P ＜0.01 and r = 0.87, P ＜0.01, respectively).Conclusions MAD may be a promising modality to evaluate the global systolic function of LV in patients with MI for clinical routine practice.%目的 应用超声斑点追踪显像(STI)技术评价心肌梗死患者的左室整体收缩功能，探讨二尖瓣环位移(MAD)评价左室整体收缩功能指标的可行性和准确性。方法 对20例心肌梗死患者及30例健康对照者，应用STI技术计算左室收缩期整体峰值纵向应变(GLs)、圆周应变(GCs)、MAD，应用实时三维超声心动图计算左室射血分数(LVEF)。比较对照组和心肌梗死组应变参数、MAD与LVEF之间的关系。结果 与对照组比较，心肌梗死组各参数明显减低(P＜0.05)。对照组与心肌梗死组GLs为LVEF的独立预测因子，对照组及心肌梗死组MAD与LVEF均呈显著相关(分别r=0.84，P＜0.01 ;r=0.87，P ＜0.01)。结论MAD和LVEF之间存在较好的相关性，有望成为临床常规评价心肌梗死患者左室整体收缩功能的一种快捷、准确的方法。