通过阴道机械反射来控制交感神经活动在心力衰竭中变得
M E Dibner-Dunlap1, M D Thames
1Department of Medicine, University Hospitals of Cleveland, Case Western Reserve University, Ohio.
Circulation
|December 1, 1992
概括
患有心力衰竭的狗表现出对交感神经活动的心肺反射控制减少. 这种受损的反射是由心脏阴道 afferent 纤维介导的,这表明巴罗受体或中枢神经系统存在问题.
科学领域:
- 心血管生理学心血管生理学
- 自主神经系统的调节规则
- 心脏衰竭病理生理学 病理生理学
背景情况:
- 动脉巴罗反射异常在心力衰竭中是已知的.
- 在心力衰竭中对交感神经活动的心肺反射控制需要进一步的研究.
研究的目的:
- 为了确定心肺反射控制对交感神经活动在低输出心力衰竭的狗模型中是否异常.
主要方法:
- 在狗中通过快速心室节奏诱导低输出心力衰竭.
- 使用体积膨胀和心房气球膨胀刺激心肺机械受体.
- 测量交感神经活动和血液动力学压力.
主要成果:
- 与对照犬相比,体积膨胀导致心力衰竭犬的交感神经活动显著减少 (16%与70%相比).
- 与对照物种不同的是,心脏衰竭犬的心房气球膨胀并没有改变交感神经活动或动脉压.
- 在心力衰竭的狗中,即使在基线左心房压正常化时,减弱的反应仍然存在.
结论:
- 低输出心力衰竭的狗表现出对交感神经活动的心肺机械反射控制显著减弱.
- 这种衰减是由心脏的阴道 afferent 纤维介导的.
- 潜在的原因可能涉及心肺气质受体或中枢神经系统处理中的异常.
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