OCT 22, 2018
This study explores the possibility that migraine aura can be the presenting feature of embolic stroke.
The prospective analysis included 14 patients who presented with symptoms consistent with a clinical diagnosis of migraine aura, but subsequently showed evidence of an acute infarction on magnetic resonance imaging (MRI).
In all patients, migraine aura symptoms were not directly attributable to vascular lesions seen on MRI.
Half of the cohort was classified as having an embolic stroke of undetermined source. Of these, a patent foramen ovale was identified in 4 of 5 who underwent a transoesophageal echocardiogram, with large right-to-left shunt demonstrated in 3.
This study was limited by a small patient population.
The results from this cohort suggest that migraine aura can be the presenting feature of acute ischemic stroke, leading the authors to hypothesize that local ischemia triggers a widely migrating cortical wave of spreading depolarization.