Periodic dizziness, fainting and feeling like passing out
I wonder if this is even the right forum? Please point out the right one if it's not. My wife (age 52) has had this symptom many years. She would feel dizzy, faint and almost passing out (not to a point to lose consciousness completely yet). But when it comes, it's pretty severe and she feel she would pass out. This happens every a few months. She has gone MRI for brain and blood testing. All test numbers are normal (except low Iron). She has been taking Iron pills and try to raise her number. Other than Iron, what kind of tests should we ask doctor to further diagnose?