Intracranial arterial stenosis according to TCD peak systolic flow velocity divided into four groups: normal, mild stenosis, moderate stenosis, severe stenosis.

颅内动脉狭窄按照TCD收缩期血流速度判断分成四组：正常组、轻度狭窄组、中度狭窄组、重度狭窄组。

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Intracranial arterial stenosis according to TCD peak systolic flow velocity divided into four groups: normal, mild stenosis, moderate stenosis, severe stenosis.

颅内动脉狭窄按照TCD收缩期血流速度判断分成四组：正常组、轻度狭窄组、中度狭窄组、重度狭窄组。

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