在HFpEF中心肺相互作用:动态高通胀和运动PCWP
Michael G Leahy1, Denis J Wakeham1, James P MacNamara1
1Institute for Exercise and Environmental Medicine, Texas Presbyterian Hospital, Dallas, Texas, USA; Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, Texas, USA.
由于动态膨胀 (DH),心力衰竭患者在运动期间会经历更高的肺毛细血管压 (PCWP). 这表明肺机械,而不仅仅是心室硬,有助于在HFpEF运动不耐受.
科学领域:
- 心脏病学 心脏病学
- 肺部医学 肺部医学
- 运动生理学 运动生理学
背景情况:
- 保持喷射分数 (HFpEF) 的心力衰竭与炼期间肺毛细血管压 (PCWP) 的过度增加有关.
- 患有HFpEF的患者经常表现出排气流量限制 (EFL),导致动态膨胀 (DH) 和肺体积变化.
研究的目的:
- 调查动态高通胀 (DH) 和呼气流量限制 (EFL) 之间的关系,以及它们对运动期间HFpEF患者的PCWP的影响.
主要方法:
- 55名HFpEF患者接受了PCWP,肺动脉平均压力 (mPAP),心脏输出和静止和分级运动期间的通风参数的测量.
- 动态高通胀 (DH) 被定义为从休息时增加终端呼气肺体积 (≥150毫升).
主要成果:
- 患有DH的患者在20W (24±6mm Hg) 和峰值运动 (44±9mm Hg) 时显示出明显更高的PCWP,与没有DH的患者相比.
- 运动期间DH的程度与PCWP和mPAP的增加有显著的相关性 (r2 = 0.1960.204).
结论:
- 在HFpEF患者中,运动诱导的动态高通胀与PCWP升高有关.
- 由于呼吸机制受损而增加的胸内压力可能会导致运动诱导的PCWP提高HFpEF,超出心室硬度.
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