身体成分对HFrEF和HFpEF患者的氧气动力学和运动耐受性的不同影响
Gerson Cipriano1,2,3,4,5, Cássia da Luz Goulart6,7, Gaspar R Chiappa8,7
1Rehabilitation Sciences Program, University of Brasilia (UnB), Brasilia, DF, Brazil. cipriano@unb.br.
Scientific reports
|September 28, 2024
概括
减少喷射分数 (HFrEF) 的心力衰竭患者与保留喷射分数 (HFpEF) 患者相比,显示氧气吸收动力学和骨肌肉脱氧的受损. 身体组成,特别是脂肪和肌肉质量,会影响HFrEF的运动表现.
科学领域:
- 心脏病学 心脏病学
- 运动生理学 运动生理学
- 生物医学工程 生物医学工程
背景情况:
- 心力衰竭 (HF) 分为心力衰竭与减少喷射分数 (HFrEF) 和心力衰竭与保留喷射分数 (HFpEF),通常表现出不同的病理生理机制.
- 周围局限性,包括氧气吸收和输送受损,显著导致HF患者的运动不耐受.
研究的目的:
- 为了比较HFrEF和HFpEF患者之间肺氧吸收 (VO2p),骨肌肉脱氧 ([HHb]) 和微血管O2输送 (QO2mv) 的动力学.
- 为了研究身体组成,运动参数和HF患者的运动表现之间的关系.
主要方法:
- 用心肺运动测试 (CPET) 来评估VO2动力学.
- 近红外光谱学 (NIRS) 测量了骨肌肉脱氧 ([HHb]).
- 微血管O2输送 (QO2mv) 通过Fick原理计算,并使用双能X射线吸收计 (DEXA) 评估身体成分.
主要成果:
- 与HFpEF患者相比,HFrEF患者的VO2动力学显著减慢,[HHb]反应更快.
- 在HFrEF患者中,微血管O2输送 (QO2mv) 高于HFrEF患者,他们也有更短的时间来运动不耐受.
- 增加的脂肪与[HHb]振幅和峰值VO2有负相关性,而较高的瘦肌比例与[HHb]振幅和tau正相关.
结论:
- 与HFpEF患者相比,HFrEF患者表现出更严重的外周功能损害,其证据是受损的VO2p动力学,骨肌肉脱氧和微血管O2输送.
- 身体成分起着至关重要的作用,在HFrEF中增加脂肪和减少瘦肉量与氧气扩散能力降低和氧气吸收动力学受损有关.
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