Sometimes migraine aura changes from attack to attack, raising the question of whether the change is heralding an ischemic stroke or an unusual aura. Differentiating unusual migraine aura from the onset of an acute ischemic stroke in patients with migraine with aura (MwA) can be challenging.

中文翻译：

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有先兆偏头痛患者急性缺血性脑卒中及异常先兆特点

有时偏头痛先兆会随着发作而变化，这就提出了这样的问题：这种变化是否预示着缺血性中风或异常先兆。在先兆偏头痛 (MwA) 患者中，区分异常偏头痛先兆和急性缺血性中风发作可能具有挑战性。