首都医科大学学报 ›› 2007, Vol. 28 ›› Issue (3): 350-354.

• 基础研究 • 上一篇    下一篇

用运动试验评价心力衰竭模型大鼠心功能

马力1, 刘杰2, 初楠2, 史旭波2, 杨进刚2, 李田昌2, 胡大一3   

  1. 1. 首都医科大学附属北京天坛医院内科;2. 首都医科大学附属北京同仁医院心脏中心;3. 北京大学人民医院心内科
  • 收稿日期:2006-09-30 修回日期:1900-01-01 出版日期:2007-06-24 发布日期:2007-06-24

Rats Model of Abdominal Aortic Banding and Exercise Test on Evaluation of Cardiac Function

Ma Li1, Liu Jie2, Chu Nan2, Shi Xubo2, Yang Jingang2, Li Tianchang2, Hu Dayi3   

  1. 1. Department of Medicine, Beijing Tiantan Hospital, Capital Medical University;2. Cardiac Center, Beijing Tongren Hospital, Capital Medical University;3. Department of Cardiovascular Diseases, Renmin Hospital, Peking University
  • Received:2006-09-30 Revised:1900-01-01 Online:2007-06-24 Published:2007-06-24

摘要: 目的 用腹主动脉缩窄法建立大鼠慢性心力衰竭模型,探讨运动试验在心功能评价中的意义。方法 W istar大鼠80只,用数字表法将大鼠随机分为手术组和假手术对照组,术后第4、8、12和16周行运动试验并监测血流动力学变化,比较心脏肥厚程度、血流动力学和运动耐力等指标的变化。结果 大鼠腹主动脉缩窄术后左心室舒张末压(LVEDP)升高,8周开始显著高于假手术组,差异有统计学意义(P<0.05)。术后8周左心室内压下降最大速率(-dp/dt)显著低于对照组,差异有统计学意义(P<0.001)。术后12周左心室收缩末压(LVSP)显著升高,左心室内压上升最大速率(+dp/dt)显著降低。术后4周心脏重量指数和心肌细胞直径(CMD)均升高,8周时明显高于假手术组,差异有统计学意义(P<0.001),术后12周和16周升高更为明显。手术组的运动时间、运动距离和运动耐量在术后16周明显低于假手术组,差异有统计学意义(P<0.01)。结论 用腹主动脉缩窄法可成功复制大鼠慢性心力衰竭模型,运动试验可用于评价心功能代偿情况。

关键词: 大鼠, 腹主动脉缩窄, 心脏肥厚/心力衰竭, 动物模型, 运动耐力

Abstract: Objective To establish rat model of chronic heart failure by partially banding abdominal aorta for different time limits and to elucidate the clinical implication of exercise test on evaluation of cardiac function of the rat model of chronic heart failure.Methods Eighty Wistar rats were randomly divided into two groups: aortic banding group and sham-group(each containing 40 rats).Cardiac mass index,exercise parameters,hemodynamic parameters and cardiac morphological changes were investigated at different time(4,8,12 and 16 weeks after the operation) in different groups.Results Left ventricular end-diastolic pressure(LVEDP) increased greatly in aortic banding group compared with sham-groups(after 8 weeks,P<0.05).The diastolic parameter of-dp/dt decreased in 4 weeks after aortic banding(P=0.054),and lower than sham-group significantly in 8 weeks after operation(P<0.001).Left ventricular systolic pressure(LVSP) and +dp/dt increased after 12 weeks of aortic banding operation(P<0.05) compared with sham-group.Cardiac mass and cardiac mass index increased from 4 weeks after aortic banding(P>0.05) compared with sham-group,and more significant higher than the sham-group in 8 weeks after operation(P<0.05).Cardiac myocardial diameter(CMD) increased compared with sham-group from 4 weeks after aortic banding(P<0.001).Parameters of exercise test in aortic banding group decreased compared with sham-groups of corresponding time points(P>0.05),and more significant in 16 weeks after operation(P<0.01).And the parameters of exercise test in aortic banding group of 16 weeks after the operation were also lower than the baseline(P<0.001).Conclusion Abdominal aortic banding can successfully copy chronic heart failure model in rats.Exercise test can be successfully used for the evaluation of cardiac function of the model.

Key words: rat, abdominal aortic banding, cardiac hypertrophy/heart failure, animal model, exercise test

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