My wife has had a TIA and has been having a migraine ever since. They did a MRV and found that she has a smaller than normal vein on her left side. In 1999 she had a stroke and the only thing that we were told was she had a high level of homocysteine @ 28.6. Just recently she had 22 and the just did blood work but have not got the results back yet as they have to send it to Dallas. Any help on what might be causing the headache?