Neurology:老年人低脑血流量与较低的心脏指数有关!

2017-11-09 xing.T MedSci原创

由此可见,在无卒中、无痴呆和无心衰的老年人中,全身血流量与颞叶CBF具有相关性,并且独立与CVD,但与CVR无关。

近日,神经病学领域权威杂志Neurology上发表了一篇研究文章,研究人员旨在横断面地评估老年人较低的心脏指数是否与其较低的静息时脑血流(CBF)和脑血管反应性(CVR)有关。

研究人员对范德比尔特记忆与衰老项目中无卒中、无痴呆和无心衰的参与者(n=314,73±7岁,59%为男性,39%为轻度认知功能损害)进行了分析,通过超声心动图来量化心脏指数(L/min/m2)。并且通过伪连续动脉自旋标记MRI来量化静息时脑血流量(ml/100g/min)和高碳酸血症引起的CVR。在调整年龄、教育程度、种族、Framingham卒中危险评分(收缩压、抗高血压药物、糖尿病、吸烟、左心室肥厚、心血管疾病[CVD]、心房颤动)、APOE ε4 状态、认知诊断以及区域组织体积后,研究人员采用普通最小二乘的线性回归来估计心脏指数与区域CBF之间的相关性。

研究人员发现较低的心脏指数与较低的左侧(β=2.4,P=0.001)和右侧(β=2.5,P=0.001)颞叶静息血流量相对应。当将患有CVD和心房颤动的患者排除之后,结果与之前相似(左侧颞叶为β=2.3,P=0.003,右侧颞叶为β=2.5,P=0.003)。在其他区域评估时,研究人员发现心脏指数与CBF无关(P>0.25),在所有脑区,心脏指数与CVR均无关(P>0.05)。在心脏指数与认知诊断相互作用的模型中,只有在认知正常的参与者中,心脏指数与CBF之间存在相关性,并且对大多数区域具有影响,对左侧颞叶(P<0.0001)和右侧颞叶(P<0.0001)影响最大。

由此可见,在无卒中、无痴呆和无心衰的老年人中,全身血流量与颞叶CBF具有相关性,并且独立与CVD,但与CVR无关。

原始出处:

Angela L. Jefferson,et al. Lower cardiac index levels relate to lower cerebral blood flow in older adults.Neurology. 2017. http://dx.doi.org/10.1212/WNL.0000000000004707

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    2018-03-25 yinhl1978
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    2017-11-10 186****0580(小山羊)

    学习了谢谢了

    0

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    2017-11-09 1ddf0692m34(暂无匿称)

    学习了.涨知识

    0

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