PAT/SVT during exercise?

I've had PAT for about 15 years and the attacks have been mild and seldom, until the last two years. In the last two years the PAT attacks are more frequent and begin with a feeling of my heart "flopping" around accompanied by dizziness - this is new and it scares me. I am 30, in good health, recently quit smoking, do not drink alcohol or caffeine.

Lately, in the past year, the real problem has been the PAT after or during aerobic exercise. This has happened twice at the gym now, both times making me feel very, very dizzy in the beginning of the PAT. I am now afraid to do any aerobic exercise. Just yesterday I was in an aerobics class and had to stop before it ended because I was afraid I could feel one coming on - my chest felt tight and my heart felt weak.

Has anyone else experienced this with exercise? I kept myself very hydrated yesterday, but the two other times I got the PAT during exercise I know I was a bit dehydrated. I just want to be able to go to the gym like everyone else!

I have an appt tomorrow with an Electrophysiologist for this exact problem. I've had ECG's, ultrasounds, blood tests, stress tests and holter monitors and nothing has caught it.

[iRossoneri]

I have only had heart fluttering later on in the night after working out.  I used to work out and run a LOT but in 2007 I started getting pain when over exerting myself.  I am going to see my doctor today...Either way, go see your doc and everybody and I wish you the best of luck :)