<s>[INST] Hi, may I answer your health queries ri Hello, my mother is 47 years old and had open heart surgery 15 years ago for her mitral valve. She has a mechanical valve now and things were going fine. In 2000 we moved to Florida and ever since we moved here it seems like they canâ??t get her blood stable, itâ??s either too thin or too thick. She takes Coumadin and gets tested every two weeks. She has been having these really severe head aches for about 3 years now. When she has these head aches she almost goes back in time and thinks I am still in high school and we live in Indiana. She always goes back to this time frame. I have two children now, and she got one of her headaches the other day and though my children were neighborhood kids. They have given her a cat scan, MRI, x rays. All these things show normal. What would cause her to go back in time like that? What could be causing her head aches? They have tried all kinds of medicines for the head ache and nothing has work, not can they figure out what makes her think she is in Indiana again. Would an aneurysm show on a CT scan? That is what I worry about that there is something there and they arenâ??t finding it. ght now ? Please type your query here... [/INST] Hello, I passed carefully through your question and would explain that her symptoms could be related to low blood flow to the brain or dementia. For this reason, I recommend consulting with a neurologist for a careful physical exam, a brain MRI and cognitive tests. Hope I have answered your query. Let me know if I can assist you further. Regards, Dr. Ilir Sharka, Cardiologist </s>