My husband went to the ER over a week ago with severe pain in the right, middle top of the head. The pain was so bad that his whole body would convulse in pain about every 4 minutes for days. so far they have given him a CT scan, MRI, EEG, MRA, and now are ordering a CTA test. Is it normal to have this many tests? They were unable to diagnosis anything off of the CT scan and MRI, the other tests results have not been shared with us yet. He had the MRA today and a few hours later the hospital called and said the doc had ordered a CTA test for tomorrow. I am leaving for a business trip and am very worried to leave him if there would be a reason to add this test at the last minute. Why would a doc add that test? What could be the possible issue from the other tests that would require a CTA or is that a part of a "full workup"?