Marc - glad to hear you're doing better. I have a good friend this happened to in 2005. He was TDY to Thailand (I know - no stress there) and was in the hotel (actaully alone) when the tachycardia hit for the first time. He was taken to teh hospital and stabilized, much as you were, then med-evaced home. He had a few more incidents and, long story short, over the next year they eventually found it wasn't lifestyle (which they initially blamed) it was a small cyst putting pressure on the nerve at one of the ventricular walls. They finally removed the cyst last year and he's fine now. (although he lost his flying status and had to gety a new job). Just thought I'd pass it on in case it ends up not being a one time event. I'd rather not see another friend suffer for over a year before they get there act together and find the real problem.
Be safe and I hope you never have to go throgh that again.
-K-