A transient ischemic attack is a stroke syndrome caused by a temporary obstruction of blood flow to part of the brain in which normal function is regained within a day, and it s usually within minutes. Those who have had a TIA are at considerable risk of having a full-blown stroke soon, so the appropriate tests need to be done to see what treatments might decrease that risk. In most cases, aspirin therapy or aspirin-dipyridamole therapy is all that can be done, cutting the risk by a third or better, but sometimes something more correctable can be found.