应用超声多普勒评价不同QRS时限心力衰竭患者的收缩同步性Prevalence of dyssynchrony derived from echocardiographic criteria in heart failure patients with normal or wide QRS duration
牛红霞,华伟,张澍,孙欣,王方正,陈柯萍,陈新
摘要(Abstract)：
目的应用常规超声和组织多普勒技术评价收缩不同步在QRS时限正常及增宽的心力衰竭患者中的发生率。方法选择60例纽约心脏病学会(NYHA)分级心功能Ⅲ级的扩张型心肌病患者,其中QRS时限≤120ms者30例,QRS时限>120ms者30例,均接受常规超声和组织多普勒检查。以左、右心室射血前间期之差>40ms作为室间收缩不同步的指标。应用组织多普勒技术分别测量室间隔和左心室侧壁基底部心肌达到收缩峰值的时间,二者时差>60ms定义为室内收缩不同步。满足室间、室内收缩不同步标准任一项即视为存在收缩不同步。结果QRS时限≤120ms的心力衰竭患者中有23.3%存在收缩不同步,而QRS时限>120ms者中不同步比例高达86.7%,二者差异有统计学意义(P<0.01)。未发现QRS时限与超声证实的收缩不同步间存在相关性(P=0.112)。结论尽管QRS时限增宽心力衰竭患者的不同步比例很高,但仍有一定比例的患者同步性尚好。同时,亦有一定比例的QRS时限正常者存在收缩不同步。
关键词(KeyWords)： 超声检查,多普勒;心电描记术;心力衰竭
基金项目(Foundation):
作者(Author): 牛红霞,华伟,张澍,孙欣,王方正,陈柯萍,陈新
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