低血对肌肉交感神经活动和心血管功能的影响:系统性审查和元分析
Michael M Tymko1,2,3, Desmond Young3, Daniel Vergel3
1Integrative Cerebrovascular and Environmental Physiology SB Laboratory, Department of Human Health and Nutritional Sciences, College of Biological Science, University of Guelph, Guelph, Ontario, Canada.
高海拔低氧症显著增加肌肉交感神经活动 (MSNA) 爆发频率比其他类型更多. 低氧症的类型和严重程度会影响健康个体的交感神经和心血管反应.
科学领域:
- 生理学 生理学 生理学
- 心血管科学 心血管科学
- 高度医学 高度医学
背景情况:
- 低氧症或低氧水平会影响生理反应.
- 肌肉交感神经活动 (MSNA) 是心血管功能的关键调节者.
- 了解不同类型的低氧症如何影响MSNA和心血管参数对于适应性研究至关重要.
研究的目的:
- 系统地审查和分析急性波基洛卡普尼克,高海拔和急性异卡普尼克低氧症对MSNA和心血管功能的影响.
- 为了比较MSNA和心血管参数在不同类型的低氧症变化的大小.
- 为了研究低氧症严重程度和MSNA之间的关系.
主要方法:
- 观察性研究的系统审查和元分析.
- 在2021年6月之前搜索电子数据库,对健康个体暴露于低血的研究进行了搜索.
- 分析了MSNA (爆发频率,幅度,发生率),心率 (HR) 和平均动脉压 (MAP) 的数据.
主要成果:
- 与急性poikilocapnic和isocapnic hypoxemia相比,在高海拔低氧症期间,MSNA爆发频率显著增加.
- MSNA爆发幅度仅在急性异囊性低氧化症期间升高,而发病率仅在高海拔低氧化症期间增加.
- 在所有低氧症类型中,心率同样增加. 平均动脉压在高海拔和急性异角性低氧症期间上升,但在急性异角性低氧症期间没有上升.
结论:
- 低氧症的类型和严重程度都显著影响了健康人群的交感神经活动和心血管功能.
- 与其他急性形式相比,高海拔低氧症会引起更明显的同情反应.
- 这些发现增强了对人类生理适应减少氧气环境的理解.
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