氧气吸收效率斜率和预后心力衰竭与减少的射出分数
Jonathan Gordon1, Katherine C Michelis2, Ambarish Pandey2
1Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, Texas.
The American journal of cardiology
|July 2, 2023
概括
氧气吸收效率斜率 (OUES) 预测了心力衰竭的临床结果,但峰值氧气吸收 (VO2) 提供了更好的预后价值. 美国的OUES
科学领域:
- 心脏病学 心脏病学
- 运动生理学 运动生理学
- 临床试验 临床试验
背景情况:
- 氧气吸收效率斜率 (OUES) 在心力衰竭与减少喷射率 (HFrEF) 的预后效用仍然不确定.
- 之前的研究对OUES的独立预后价值产生了相互矛盾的结果.
- HF-ACTION试验提供了一大数据集,以重新评估OUES在氧气吸收 (VO2) 峰值的作用.
研究的目的:
- 评估OUES在HFrEF患者的预后效用.
- 为了比较OUES与峰值VO2的预后性能.
- 调查OUES和VO2峰值与因心力衰竭或心血管死亡而住院的关联.
主要方法:
- 从HF-ACTION试验中对2,074名患者进行了后期分析.
- 多变量考克斯回归模型被用于评估OUES和峰值VO2与临床结果的关联.
- 模型被调整为每分钟通风/二氧化碳生产 (VE/VCO2) 斜率和其他混因素.
- 哈雷尔的C统计被用来比较OUES和峰值VO2的歧视性表现.
主要成果:
- 较低的OUES与心力衰竭住院或心血管死亡的风险增加显著相关 (HR 2.1,95% CI 1.5-2.9).
- 与OUES相比,峰值VO2表现出优异的歧视性表现 (C统计值为0.73与0.70,p<0.001).
- 在呼吸交换比率<1的小组中,峰值VO2仍然是显著的预测因素,而OUES则不是.
结论:
- OUES与HFrEF患者的临床结果有关,独立于VE/VCO2斜率.
- 然而,OUES的预后效用低于高峰VO2.
- 峰值VO2是不利结果的更强有力的预测指标,即使在亚最大努力下测量.
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