My TIA is from a severely stenosed M1 vessel not AFIB. They did see that on the CT scan. They suspected an ocular migraine but after the CT thought I might have had a clot that cleared once my blood pressure rose because I was scared once my face started to droop and I was unable to speak properly.
It happened again a few days ago but I am still on aspirin and was also taking aleve so it never went past the eye issues.