静脉循环中的缩功能是炼,但不是预装,可以招募
Simone Goa Diab1, Assami Rösner2, Gaute Døhlen3
1Department of Paediatric Cardiology, Oslo University Hospital, Rikshospitalet, Oslo, Norway; Faculty of Medicine, Institute of Clinical Medicine, University of Oslo, Oslo, Norway.
概括
青少年Fontan循环患者在运动时表现出缩功能改善,但在增加液体负载时没有. 这突出了运动作为一种方法来招募Fontan患者的心肌功能储备.
科学领域:
- 心脏病学 心脏病学
- 儿童心脏病学 儿童心脏病学
- 心血管生理学心血管生理学
背景情况:
- 喷泉循环与缩功能受损有关,但潜在的机制尚不清楚.
- 了解心肌功能储备对于管理Fontan相关的循环衰竭至关重要.
- 这项研究研究了在患有Fontan循环的青少年中对不同生理压力的心肌反应.
研究的目的:
- 在青少年Fontan患者中探索心肌功能储备.
- 评估心肌功能对急性运动压力的反应.
- 评估急性预负载增加对心肌功能的影响.
主要方法:
- 32名青少年Fontan患者在运动和急性体积负荷期间接受了心声回声扫描.
- 在运动 (LSstress) 和盐溶液输液 (LScath) 期间测量了心肌峰纵向应变 (LS).
- 在导管治疗期间记录了中央静脉压和心室末端透气压;16名健康人作为运动测试的对照.
主要成果:
- 与对照组相比,Fontan患者在运动期间显示LS降低,但LSstress在最大负载时显著改善.
- 压力与心率变化没有相关性.
- 在急性体积负荷 (LScath) 期间的LS没有显著改善,并且在一半以上的患者中恶化,与压力升高相关.
结论:
- 青少年Fontan患者表现出可以通过炼招募的缩性心肌功能储备.
- 急性预负载增加并不能有效地在Fontan循环中招募心肌功能储备.
- 研究结果表明,在Fontan生理学中,肌动脉对不同血液动力学挑战的反应有不同的机制.
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