动脉化学受体抑制改善了高动脉化学敏感性参与者的运动耐受性:二次分析
Sophie É Collins1, Devin B Phillips2, Michael K Stickland3
1Research Institute of the McGill University Health Centre, McGill University, Montréal, Québec, Canada.
用多巴胺抑制心血管化学受体 (CC) 改善了高缺氧呼吸反应 (HVR) 个体的运动耐力时间. 这表明高HVR有助于慢性心力衰竭和COPD的运动限制.
科学领域:
- 心血管呼吸系统生理学
- 临床运动科学 临床运动科学
背景情况:
- 慢性心力衰竭 (CHF) 和慢性阻塞性肺部疾病 (COPD) 与心血管化学受体 (CC) 灵敏度升高和运动耐受性降低有关.
- 在这些条件下,CC敏感度升高可能会加剧运动限制.
研究的目的:
- 调查是否用多巴胺抑制CC敏感性可以改善高CC敏感性个体的运动耐受性.
- 为了确定血管导电率的改善和减少不适是否与增强的运动耐力相关.
主要方法:
- 来自33名健康对照组,心血管疾病和COPD患者的数据的二次分析,来自两个随机的,安慰剂对照试验.
- 通过低氧呼吸反应 (HVR) 评估的状腺化学受体 (CC) 灵敏度.
- 在运动测试期间注入多巴胺或安慰剂,以测量运动耐力时间 (EET) 和心肺反应.
主要成果:
- 高HVR的参与者在EET中表现出多巴胺诱导的显著改善,腿部不适减少.
- 在那些有增强血管导电性和减少腿部不适的人群中,观察到EET的更大改善.
- 在16名参与者 (1对照组,7COPD,8CHF) 中发现了高HVR.
结论:
- 使用多巴胺抑制 Carotid 化学受体 (CC) 可以提高高缺氧呼吸反应 (HVR) 个体的运动耐力时间.
- 高HVR被认为是导致运动限制的一个因素.
- 改善EET与CC介导的血管导电率增加和腿部不适减少有关.
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