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运动无氧值和通风效率识别心力衰竭患者的高风险过早死亡
Anselm K Gitt1, Karlman Wasserman, Caroline Kilkowski
1Herzzentrum Ludwigshafen, Department of Cardiology, Ludwigshafen, Germany. gitta@klilu.de
Circulation
|December 11, 2002
概括
对于慢性心力衰竭患者来说,无氧值 (VO2AT) 和呼吸效率 (VE/VCO2斜率) 比最大氧气吸收 (VO2峰值) 更好地预测早期死亡风险. 将这两种措施结合起来,可以提供最准确的风险评估.
科学领域:
- 心脏病学 心脏病学
- 运动生理学 运动生理学
- 肺部医学 肺部医学
背景情况:
- 最大氧吸收 (峰值VO2) 是慢性心力衰竭 (CHF) 的标准风险分层工具.
- 峰值VO2可能受到患者动机或研究人员决定的限制,可能低估了真正的运动能力.
- 无氧值 (VO2AT) 和通风效率 (VE/VCO2斜率) 不太容易受到主观影响.
研究的目的:
- 为了比较峰值VO2,VO2AT和VE/VCO2斜率的预测值,识别高风险6个月死亡的CHF患者.
- 为了确定VO2AT和VE/VCO2倾斜的组合是否比单独的峰值VO2提供更好的风险分层.
主要方法:
- 在223名连续的CHF患者中,进行了气体交换测量的心肺运动测试.
- 测量了VO2,VO2AT的峰值,以及VE/VCO2的斜率.
- 患者的随访时间平均为644天,以评估6个月死亡率.
主要成果:
- 患者的VO2AT<11毫升/千克/分钟或VE/VCO2斜率>34有5倍的早期死亡风险增加.
- 结合VO2AT<11毫升/千克/分钟和VE/VCO2倾斜率>34导致过早死亡的风险增加了10倍.
- 多变量分析证实,VO2AT和VE/VCO2斜率的组合是6个月死亡率的最佳预测指标,即使经过对临床因素的调整.
结论:
- VO2AT和VE/VCO2斜率的组合是CHF患者早期死亡率的更强有力的预测指标,而不是VO2峰值.
- 这些参数应考虑在优先考虑心脏移植患者时.
- 使用VO2AT和VE/VCO2斜率可以改善CHF患者的风险分层.
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