john999,
I had a chemical stress done 2 weeks ago at the Sac. VA hospital (Mather). Had one guy on the machine, 1 doctor administering the dosage and a nurse outside the room with a crash-cart. The doc told me I could stop at any time I felt like. And a docotor is supposed to be present at all times of the procedure.
Anyhow, they kept asking me questions, if I was thirsty, dizzy, pains, short of breath, and others. I said no to all. They kept looking at each other the whole time, and saying I should feel something. I didn't experience any discomfort. They probably thought I was almost dead. But I was tired that morning and could have slept thru the test. Oh, and I'm 58, and age might come into play for the stress test. My heart was great, so I was ok'ed for prostate surgery. My test only lasted about 1 hour.
Just my story.