Stroke:CFPWV和血管性脑损伤收缩压对FW,FA和WMH的作用机制

2017-05-05 MedSci MedSci原创

Framingham心脏研究的报告已经确定了颈动脉 - 股动脉脉搏波速度(CFPWV)和血管性脑损伤的收缩压可以反映动脉硬化的动脉横断面情况。本研究的目的是评估Framingham研究组和第三代队列的受试者的自由水(FW),分数各向异性(FA)和白质高信号(WMH)。

Framingham心脏研究的报告已经确定了颈动脉 - 股动脉脉搏波速度(CFPWV)和血管性脑损伤的收缩压可以反映动脉硬化的动脉横断面情况。本研究的目的是评估Framingham研究组和第三代队列的受试者的自由水(FW),分数各向异性(FA)和白质高信号(WMH)。

在2422名年龄在51.3±11.6岁的参与者中,使用基于体素的线性和广义线性回归,并调整相关协方差进行分析,设定FA,FW和WMH与CFPWV相关。在白质(WM)区域计算平均FW,平均FA和WMH负荷(log转换),并通过多次调停分析设定血管性脑损伤收缩压和CFPWV相关。

研究结果发现,WM区域,CFPWV与较高FW,较低FA和较高的WMH发生率有关,分别为356.1211.8和10.9 mL(在WM覆盖面积中)。调查分析显示,收缩压对FW的影响由CFPWV(直接和间接影响:a = 0.040; P <0.001,a = 0.020; P> 0.05)介导。此外,CFPWV对FA的影响由FW(直接和间接影响:b = -0.092; P <0.001,b'= 0.012; P> 0.05)介导,而CFPWV对WMH的影响又由FA介导(直接和间接影响:c = 0.246; P <0.001,c'= 0.116; P> 0.05)。

为更进一步研究,该研究提出了一个生物力学假设,期望在未来研究中能够明确何种血液动力学改变可通过影响脑含水量和WM完整性导致WM的损伤,最终将对WMH的精密调控表现出来。

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    2017-10-09 yzh411
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    2017-05-10 meiliwuxian

    学习一下

    0

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