Suggest Treatment For Fainting Spells Along With Severe Dizziness

I have fainting spells with severe dizziness all the time the dizziness I have had all the test you can imagine with no conclusion to the problem all seems fine I have a loop recoder with no significant results had a pfo closure a year ago but still have the dizziness and I faint with no sytems I am only out for less then a min or so I did have a cerebral anyersum clipped back in 1997 all seems fine with that I have metal clips so I cannot have a Mir but have had evey other test for heart and nuro problems the only thing that I had a positve result was a stress test tilt table.