王新宇,王莹,王晓华,祖凌云,高炜

• 1:北京大学第三医院心内科卫生部心血管分子生物学与调节肽重点实验室分子心血管学教育部重点实验室

摘要(Abstract)：

目的应用心脏磁共振成像(cardiac magnetic resonance image,CMRI)技术评价完全性左束支传导阻滞(complete left bundle branch block,CLBBB)对收缩性心力衰竭患者左心室形态和功能的影响。方法连续入选因心力衰竭入院、超声心动图测定的左心室射血分数(left ventricular ejection fraction,LVEF)小于50%且合并CLBBB的患者13例作为试验组;选取同时期年龄、性别及LVEF匹配的原发性扩张型心肌病患者19例作为对照组。两组均行CMRI检查,比较CLBBB对心力衰竭患者左心室形态及功能的影响。结果试验组心电图中QRS波时限明显宽于对照组[(147.5±13.1)ms比(108.7±16.9)ms,P<0.001],差异有统计学意义;试验组左心室舒张末容积[(173.8±23.1)ml比(247.9±60.7)ml,P<0.001]、左心室舒张末容积指数[(102.6±19.8)ml/m~2比(147.5±38.3)ml/m~2,P=0.001]、左心室收缩末容积[(123.1±18.7)ml比(188.2±57.1)ml,P<0.001]、左心室收缩末容积指数[(73.1±17.0)ml/m~2比(112.3±36.2)ml/m~2,P=0.001]、左心室舒张末期内径[(56.1±5.0)mm比(66.8±6.5)mm,P<0.001]、右心房面积[(15.7±6.0)cm~2比(20.5±6.2)cm~2,P=0.037]均低于试验组,差异均有统计学意义;试验组平均最大室壁厚度高于对照组[(8.3±1.4)mm比(7.2±1.1)mm,P=0.016],差异有统计学意义。结论 CLBBB可能参与了左心室收缩功能的下降,这种继发因素相关的心力衰竭,左心室扩张不如原发性扩张型心肌病显著,并且左心室壁厚度并不薄。

关键词(KeyWords)： 完全性左束支传导阻滞;收缩性心力衰竭;左心室形态

Abstract:

Keywords:

基金项目(Foundation): 北京大学第三医院优秀留学回国人员科研启动基金

作者(Author): 王新宇,王莹,王晓华,祖凌云,高炜

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