A 38-year old man with an 8-year history of migraine with subclinical abnormal brain lesions on MRI was admitted to our hospital. His migraine attacks followed visual disturbance or dysarthria. Brain MRI revealed old infarctions restricted to the posterior circular region. On transesophageal cardiography, an atrial septal defect (ASD) was detected, and a bubble study showed an immediate appearance of many bubbles in the left atrium via ASD without Valsalva maneuver. The bubble study on transcranial-color-flow imaging also detected micro-embolic signals at the left vertebral artery and the left middle cerebral artery without Valsalva maneuver. Since paradoxical embolism via ASD was highly suspected and Qp/Qs was more than 1.5, transcatheter closure of ASD using AMPLATZER(®) Septal Occluder was performed. At a 2-year follow up, no recurrence of either migraine or infarction was found. This case indicates the relevance of right-to-left shunt to migraine with aura, as well as the usefulness of transcatheter closure of ASD using AMPLATZER(®) Septal Occluder for treatment of migraine with aura.
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