【摘要】 目的 应用组织追踪显像(TTI)评估扩张型心肌病(DCM)严重心力衰竭心电图QRS间期增宽者及QRS间期正常者的心肌收缩同步性，探讨TTI技术的临床应用价值。方法 应用TTI分析20例DCM心电图QRS间期正常者、19例QRS间期延长者和23例正常对照者的左室壁多普勒组织位移曲线，分别测量QRS波起始至左室各室壁基底段、中间段位移曲线上收缩期位移峰的时间，并除以 R-R进行校正(Ts)。计算Ts的极差(Ts-R)、标准差(Ts-SD)用以评估左室收缩同步性。结果 DCM心电图QRS间期正常者、延长者分别有11例、14例存在左室收缩失同步化，与对照组(23例)比较差异有显著性(P均<0.01)。39例DCM病人最大收缩延迟部位以后间隔、后壁、下壁为多见。结论 左室收缩失同步化在DCM严重心衰QRS间期延长者及QRS间期正常者中均大量存在，DCM病人左室收缩失同步化类型并不完全相同。TTI提供了一种评估左室收缩失同步化的方法。

    【关键词】 组织追踪显像；扩张型心肌病；心肌收缩；失同步化

    Evaluation of left ventricular systolic asynchrony in DCM patients with heart failure by tissue tracking imaging

    JIANG Ji-peng.Department of Ultrasound，Tianjin First Central Hospital，Tianjin 300192，China

    【Abstract】 Objective To assess myocardial systolic asynchrony of left ventricle (LV) in dilated cardiomyopathy (DCM) patients of serious heart failure (HF) with prolonged and normal QRS interval by tissue tracking imaging (TTI).To evaluate the clinical application value of TTI.Methods 20 DCM patients with normal QRS interval，19 ones with prolonged QRS interval and 23 normal subjects were included in the study.TTI was performed in the basal and mid segments of LV walls.The time from the beginning of the QRS complex to peak myocardial systolic displacement was measured and was rectified by dividing R-R interval into it(Ts).For the assessment of synchronicity ......