神经性正静性低血压中的脑血流动力学:系统性审查和元分析
Jacquie R Baker1,2, Paul A Beach3, Shaun I Ranada1,2
1Department of Cardiac Sciences, Cumming School of Medicine, University of Calgary, Alberta, Canada (J.R.B., S.I.R., A.P., S.R.R.).
Hypertension (Dallas, Tex. : 1979)
|November 21, 2024
概括
与健康个体相比,神经性正静性低血压 (nOH) 会导致脑血流速度 (CBFv) 显著下降. 有症状的nOH患者比无症状患者体验到更大的CBFv减少,突出显示CBFv.
科学领域:
- 神经学 神经学
- 心血管生理学心血管生理学
- 脑血管调节 脑血管调节
背景情况:
- 神经性正静性低血压 (nOH) 具有病态的血压在站立时下降的特征,可能导致亚临床大脑低 perfusion 和不良的神经结果.
- 大脑血流速度 (CBFv) 动态反映了血压波动对大脑自我调节的影响,但其在nOH和相关条件中的作用尚未完全理解.
- 在nOH症状和CBFv下降的幅度之间的关系需要进一步调查.
研究的目的:
- 为了比较神经性正静性低血压 (nOH) 患者与健康对照组 (HC) 的脑血流速度 (CBFv) 变化.
- 评估nOH患者和疾病匹配对照 (例如,带有或没有nOH的帕金森病) 之间的CBFv差异.
- 调查症状的nOH是否与与无症状的nOH相比更明显的CBFv下降有关.
主要方法:
- 在Embase和MEDLINE上进行了系统的文献搜索,直到2024年4月.
- 从包括的研究中提取了卧式和直立脑血流速度 (CBFv),平均值,标准偏差和样本大小的数据.
- 随机效应元分析被用来比较干预后CBFv.的群体间效应大小.
主要成果:
- 与健康对照组 (HC) 相比,神经性正静性低血压 (nOH) 患者在脑血流速度 (CBFv) 中表现出明显较大的正静性减少 (Hedge g = -0.64,P<0.001).
- 在nOH患者和疾病匹配对照组之间,CBFv下降的幅度没有显著差异 (P=0.17).
- 与无症状的nOH患者相比,有症状的nOH患者的CBFv下降显著增加 (Hedge g = 0.84,P = 0.009).
结论:
- 与健康个体相比,神经性正静性低血压 (nOH) 与大脑血流速度 (CBFv) 的实质性正静性降低有关.
- 有症状的nOH患者比无症状患者的CBFv出现更严重的下降.
- 了解nOH中CBFv变化的临床意义对于制定预防不良神经结果的策略至关重要.
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