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维生素C可以改善高血压患者心上冠状动脉内皮功能障碍
U Solzbach1, B Hornig, M Jeserich
1Medical Clinic, Department of Cardiology, University of Freiburg, Germany.
Circulation
|October 7, 1997
概括
维生素C补充剂通过减少血管收缩和增强血管扩张,改善了高血压患者的冠状动脉功能. 这表明氧化应激有助于高血压中的内皮功能障碍.
科学领域:
- 心脏病学 心脏病学
- 血管生物学 血管生物学
- 营养科学 营养科学
背景情况:
- 高血压与自由基形成的增加有关,可能会损害氧化 (NO) 功能和冠状动脉内皮健康.
- 氧化压力可能会使NO失活,导致高血压患者内皮功能障碍.
研究的目的:
- 研究抗氧化剂维生素C能否改善高血压患者冠状动脉内皮功能.
- 测试维生素C可以抵消氧化应激对高血压中血管功能的负面影响的假设.
主要方法:
- 在没有冠状动脉疾病的22名高血压患者中,对左前垂下冠状动脉 (LAD) 的内皮依赖反应进行了评估.
- 在静脉注射维生素C或安慰剂输注之前和之后,测量了对乙胆和流量依赖血管扩张 (FDD) 的血管反应.
- 使用定量冠状动脉血管学来分析LAD光区域的变化.
主要成果:
- 在高血压患者中,维生素C显著降低了对乙胆的血管收缩反应.
- 维生素C显著增加了冠状动脉的流量依赖性血管扩张 (FDD).
- 没有观察到维生素C对多普勒流速产生显著影响.
结论:
- 维生素C的使用增强了冠状动脉的内皮依赖于冠状动脉的血管运动能力.
- 这些发现支持氧化应激增加在导致高血压患者内皮功能障碍中的作用.
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