Hi. I'm 35 & have had SVT since I was 16. I've had 4 ablations since then, the 1st @ 19, 2nd @ 20, 3rd Aug 08 & the last one Oct 08. I also have Lupus on top of it all. I was still having trouble with it after my last one so I was put on Diltiazem. It seemed to help by making it less frequent. It really doesn't beat that fast, only 100-110, and only about 30% of the time. However, the pounding is what bothers me most.