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首次前循环TIA后脑血流量降低与认知功能减退的关系

, PP. 1262-1266

Keywords: 短暂性脑缺血发作,CT灌注成像,痴呆,血管性认知障碍

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Abstract:

目的运用脑CT灌注成像技术评估首次TIA后认知功能减退是否与脑血流量变化有关。方法选择性回顾2009年8月至2014年8月在成都军区总医院神经内科住院的发病24h内首次临床诊断为前循环TIA及认知量表评定正常的50例患者,发病1周内进行全脑CTPI检查,分别监测感兴趣区域脑血容量(cerebralbloodvolume,CBV)、脑血流量(cerebralbloodflow,CBF)、平均通过时间(meantransittime,MTT)、达峰时间(timetopeak,TTP);发病第4周进行认知量表评价,根据认知量表结果分为VCI组与对照组,比较2组患者早期CTPI灌注参数的差异,并将VCI组认知量表评分与灌注参数进行相关性分析。结果VCI组与对照组在年龄、性别、血压、血脂、血糖、同型半胱氨酸、前循环TIA发作至入院平均时间及前循环TIA发作至完成CTPI的平均时间等方面结果相仿,基线水平无统计学差异;VCI组与对照组相比,VCI组CBF降低,MTT、TTP明显延长,差异有统计学意义(P<0.05);2组患者CBV相仿,差异无统计学意义(P>0.05);Spearman相关性分析显示MoCA与VCI组MTT值负相关(r=-0.51,P=0.009)。结论TIA发生后脑血流灌注降低与认知功能下降的发生有一定相关性,提示CTPI对前循环TIA后VCI早期预警有一定诊断价值。

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