在患有血管综合症的年轻患者中,大脑氧化对站立的反应
Laura Pérez-Denia1,2,3, Paul Claffey1,2, Ailbhe O'Reilly2,4
1School of Medicine, Trinity College Dublin, D02 K6K6 Dublin, Ireland.
Journal of clinical medicine
|July 14, 2023
概括
患有血管 (VVS) 的年轻人在活跃立体测试期间表现出异常的周围循环,由血红蛋白氧化量的变化表明,尽管与健康个体相比,大脑反应相似.
科学领域:
- 心脏病学 心脏病学
- 神经学 神经学
- 自主神经系统研究 自主神经系统研究
背景情况:
- 血管 (VVS) 是年轻成年人昏的常见原因,通常与大脑血流减少 (大脑缺血) 有关.
- 目前的诊断测试,如主动站 (AS) 测试,主要评估外周循环,而不是直接的大脑血液动力学反应.
研究的目的:
- 与健康对照人群相比,对年轻VVS患者进行AS测试时的脑氧化反应进行调查.
- 在VVS患者和健康个体之间识别大脑血液动力学调节的潜在差异.
主要方法:
- 招募了年轻的健康成年人和VVS患者从布和昏迷单位.
- 使用近红外光谱学 (NIRS) 测量了连续的节拍血压,心率和大脑氧化率.
- 分析了NIRS衍生的参数,包括组织和指数 (TSI) 和氧化/脱氧血红蛋白 (Δ[O2Hb]/Δ[HHb]) 的变化.
主要成果:
- 在VVS患者和对照人群之间,脑组织和指数 (TSI) 或Δ[O2Hb]中没有发现显著差异.
- 与对照人群相比,VVS患者的峰值变化较小,以及 Δ[HHb] 的恢复率更快,不依赖于血压.
- 在VVS患者中观察到血压稳定状态较高的趋势,但在校正后没有达到统计学意义.
结论:
- 年轻VVS患者在AS测试时表现出改变的外周循环反应,其特点是血红蛋白脱氧化的特定变化,而大脑氧化仍然与对照组相比较.
- 这些发现表明,潜在的超反应性自主神经系统有助于改变VVS中的外周循环.
- 需要进一步的研究来阐明大脑调节在VVS病理生理学中的姿势变化中的作用.
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