I don't know Ed. I have a post op visit this Thursday, but will need someone to take me, first time in 3 years, since I can't walk a few yards without getting dizzy, out of breath, feeling faint, although I had this for a while, its worse now. Sitting I'm feeling fine. I think it's orthostatic hypertension or hypotension. I'll probably see a heart doctor too at some point, in addition to the rest of the gang lol.