<prompt> Answer this question truthfullyCould you please provide the original sentence or context in which the phrase What is a transient ischemic attack? was used, as it appears to be already in proper English?  <response>: <reason> A transient ischemic attack is caused by the temporary disturbance of blood supply to a restricted area of the brain, resulting in brief neurologic dysfunction that usually persists for less than 24 hours.Discontinuation of the use of the term transient ischemic attack has been proposed . 