A TIA is a neurological deficit resolving within 24 hours. It is a type of stroke.
Neurological deficits may be permanent or transient. Most transient events resolve within 21 days; any failure of resolution beyond 21 days is an established stroke.
An investigation into the cause of the TIA was undertaken.
Eighty-five percent of all strokes result from cerebral infarction, of which most are due to embolization.