I hv had stress tests, with dye as well resting and non resting, They did not say anything bad except I have afib, which I was admitted in the hospital for on oct 13. Once in awhile I get heart palpitations and then I get dizzy or sometimes I am dizzy without them. My ears do not hurt, I do have ringing in the ears every day, I have had a mild heart attach, which they dont know when/. What gives me these dizzy spells?