呼吸和心率对运动的反应:比峰值氧气消耗更好地预测心力衰竭死亡率
M Robbins1, G Francis, F J Pashkow
1George M. and Linda Kaufman Center for Heart Failure, Desk F25, Department of Cardiology, Cleveland Clinic Foundation, Cleveland, OH 44195, USA.
Circulation
|December 14, 1999
概括
不正常的运动反应,包括高通风反应 (VE/VCO2) 和低慢性指数,预测心力衰竭死亡率. 这些关键指标有助于识别高风险患者,以改善管理.
科学领域:
- 心脏病学 心脏病学
- 运动生理学 运动生理学
背景情况:
- 严重的心力衰竭通常在运动期间呈现异常的慢性和呼吸反应.
- 这些反应的比较预后价值仍未得到充分研究.
研究的目的:
- 调查运动诱导的慢性和呼吸器反应对心力衰竭患者死亡率的独立预测价值.
- 为了确定这些反应是否可以分层地分类心力衰竭的风险.
主要方法:
- 一组470名心力衰竭患者 (没有β阻塞剂或内类药物) 接受了代谢应激测试.
- 测量了慢性指数,峰值氧气消耗 (VO2) 和呼吸器反应 (VE/VCO2).
- 患者被跟踪了1.5年,以了解死亡率的结果.
主要成果:
- 与健康对照人群相比,心力衰竭患者表现出明显异常的呼吸和慢性反应.
- 单变量分析确定了高VE/VCO2,低时间变量指数,低VO2,低血压和年龄较大作为死亡率预测因素.
- 多变量分析证实高VE/VCO2 (RR 3.20) 和低慢性指数 (RR 1.94) 是死亡的独立预测因素.
结论:
- 运动呼吸和慢性反应是心力衰竭死亡率的强大,独立的预测因素.
- 这些生理学措施对于心力衰竭管理中的风险分层有价值.
相关概念视频
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