If I have had 7 EKGs, a Stress test, ecco, holter monitor test that only showed 3 premature beats. I keep getting palpitations, dizzy spells (but I do take Lexapro and a beta blocker which causes dizziness). Now they have me on an event monitor to try to catch these episodes. My question is that if I had AFIB or CHF would something have been caught by now? They seem to think it is anxiety. I am under a lot of stress.