Stroke:舒张压可影响局部白质损伤负荷

2020-02-12 国际循环 国际循环

既往少有研究检测收缩压(SBP)和舒张压(DBP)对脑血管病的单独影响,在2017版美国心脏病学学会/美国心脏协会血压指南颁布后,这一缺陷越发突出。此外,血压与区域特异性白质高强度体积(WMHV)的关系也未得到充分研究。近期,发表于Stroke杂志的一项研究对此进行阐述

既往少有研究检测收缩压(SBP)和舒张压(DBP)对脑血管病的单独影响,在2017版美国心脏病学学会/美国心脏协会血压指南颁布后,这一缺陷越发突出。此外,血压与区域特异性白质高强度体积(WMHV)的关系也未得到充分研究。近期,发表于Stroke杂志的一项研究对此进行阐述。
 
研究以北曼哈顿研究(NOMAS)的数据为基础,NOMAS是一项关于卒中风险和认知能力衰退之间相关性的前瞻性队列研究。研究人员分析了SBP和DBP(根据2017年美国心脏病学学会/美国心脏协会指南定义)与区域WMHV之间的相关性,使用线性混合模型来解释区域性WMHV的相关性质。
 
纳入人群(N=1205;平均年龄64±8岁)包括61%的女性和66%的西班牙裔/拉丁裔。DBP水平与WMHV在不同区域间差异显著(P<0.05)。与DBP>90 mm Hg的患者相比,<80 mm Hg患者的额叶WMHV降低13%(95%CI:-21%~-3%),顶叶WMHV降低11%(95%CI:-19%~-1%),前室周区WMHV降低22%(95%CI:-30%~-14%),后室周区WMHV降低16%(95%CI:-24%~-6%。与DBP≥90 mm Hg的受试者相比,DBP在80~89 mm Hg的受试者的前室周区WMHV降低约12%(95%CI:-20%~-3%),后室周区WMHV降低约9%(95%CI:-18%~-0.4%)。事后配对t检验显示,心室周WMHV的估计值与颞部WMHV的估计值有显著差异(校正P<0.05)。此外,SBP与区域性WMHV无明显相关性。


图1. 不同高血压分层人群的中央区域白质体积


图2. 不同收缩压与白质体积变化的相关性


图3. 不同舒张压与白质体积变化的相关性
 
研究人员认为,根据2017版美国心脏病学学会/美国心脏协会指南定义的定义,低DBP水平与较低的白质病变负荷有关,这一点在心室周围区域尤为显著。

原始出处:
Michelle R. Caunca, Marialaura Simonetto, et al. Diastolic Blood Pressure Is Associated With Regional White Matter Lesion Load:The Northern Manhattan Study. Stroke. Originally published8 Jan 2020.



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    2020-02-14 chg122
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    2020-02-12 qingfengqishi5

    学习了,学习了

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