Objective: To investigate the cerebrovascular reactivity and reserve capacity in patients with middle cerebral artery (MCA) stenosis.

目的：探讨大脑中动脉(MCA)狭窄患者脑血管反应和储备能力。

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Vascular motor reactivity (VMR) was used for investigating the cerebrovascular reserve capacity and SPECT was used for investigating he region cerebral blood flow (rCBF).

测定血管运动反应性(VMR)观察脑血管储备能力及SPECT观察脑局部血流灌注的情况。

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