通过极端高温对大动脉血液动力学状况进行非药理学调节
Jiyang Zhang1, Lingjun Liu2, Wentao Jiang3
1Department of Mechanical Science and Engineering, Chengdu, China; Sichuan Province Biomechanical Engineering Laboratory, Sichuan University, Chengdu, China.
Journal of biomechanics
|January 24, 2026
概括
暴露于极端的热量会显著改善大动脉血流和动脉功能,通过增加壁剪应力. 这种非药物策略为无法炼的人提供了潜在的心血管健康益处.
科学领域:
- 心血管生理学心血管生理学
- 生物医学工程 生物医学工程
- 治疗性低温/高温的情况.
背景情况:
- 暴露于极端热量是心血管健康的有希望的非药物战略.
- 热引起的心血管益处的潜在血液动力学机制尚不清楚.
研究的目的:
- 用计算流体动力学 (CFD) 来评估大动脉血流中的热引起的变化.
- 研究热暴露对关键血液动力学指标和内皮功能的影响.
主要方法:
- 从健康成年人的CT扫描中重建了三维的大动脉几何形状.
- 在CFD模拟中,纳入了流体结构相互作用,以模拟热应力和血管变形.
- 血液动力学指标 (TAWSS,OSI,RRT,ECAP) 和老鼠的eNOS表达在暴露于热量之前和之后被量化.
主要成果:
- 大动脉壁剪切应力在整个大动脉中至少增加了89.9%,大动脉门的增幅最大.
- 时间平均壁切应力 (TAWSS) 增长了108.5%,而振荡切指数 (OSI) 和相对停留时间 (RRT) 则下降.
- 在暴露于热量的老鼠中,内皮氧化合成酶 (eNOS) 表达显著增加,内皮细胞激活潜力 (ECAP) 降低.
结论:
- 暴露于热量显著增强了大动脉血动力学,增加了墙壁剪切应力,改善了动脉功能.
- 这种非药物治疗方法可能对心血管有好处,特别是对于无法进行体育炼的人来说.
- 这些发现支持热暴露作为通过增强血液动力学来改善心血管健康的潜在策略.
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