Hi,
I had a max stress with echo and a tilt table with isoproterenol....I got sick on the isoproterenol and then passed out. Adenosine is not the same thing, and I have no experience with what you are going to have done. Isoproteronol does induce a 'stress response', but I don't know if it is different than the adenosine. I have the opposite problem than tachy..I get brady. You know, every one is different, and some folks breeze thru things, others have a tougher time.
It sounds like a good idea to have the testing prior to the GI testing though. I imagine you already had a cardiac cath?? I was scared when I had this stuff done, especially the cardiac cath....I had a right and left done. But, I figured I had to trust those folks, what option was there? I am still here.

The good thing about the heart is...in general, it is like working on an electrical appliance. They are pretty competent at keeping them going and pretty good at jumpstarting them if you need it. Let me know how it goes.