增加的收缩性影响左心室动能在肺高血压
E Bergström1, K Pola1, B Kjellström1
1Department of Clinical Sciences Lund, Clinical Physiology, Lund University, Skåne University Hospital, Lund, Sweden.
Physiological reports
|September 12, 2025
概括
肺高血压 (PH) 改变了心脏功能,但右心室 (RV) 可能会补偿. 在PH患者中左心室 (LV) 动能增加表明交感神经系统激活.
科学领域:
- 心血管生理学心血管生理学
- 医疗成像医学成像
- 血液动力学 血液动力学
背景情况:
- 前毛囊性肺高血压 (PH) 涉及肺血管阻力 (PVR) 升高和心脏血液动力学变化.
- 通过4D流动心血管磁共振 (CMR) 测量的动能 (KE) 量化了心内血流动力学.
- 在PH中了解心室KE对于阐明补偿机制至关重要.
研究的目的:
- 在PH患者中研究影响右心室 (RV) 和左心室 (LV) 动能 (KE) 的生理机制.
- 为了比较PH患者和健康对照之间的KE参数.
主要方法:
- 观察性病例控制研究,涉及20名PH患者和12名健康对照.
- 4D流CMR用于计算不同心脏周期阶段的RV-KE和LV-KE.
- 评估了LV收缩性和PVR,分别使用非侵入性压力-体积循环和右心导管.
主要成果:
- 系统性RV-KE在各组之间没有差异;它与RV中风体积 (SV) 相相关,但与患者的PVR无关.
- 系统性LV-KE指数为LV-SV,LV收缩性和心率在PH患者中升高.
- 晚期透支填充KE在PH患者的两个心室都增加,表明更多地依赖心房收缩.
结论:
- 在PH中,RV可以保持对PH后负载增加的补偿能力.
- 在PH患者中缩LV-KE的增加表明交感神经系统的上调.
- 在PH中观察到增强心房对心室填充的贡献.
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