After having an exercise test, I have been told I need to have another test where an infusion of a drug is put into the vein whilst the heart is stressed, with exercise, plus a small amount of isotope, which will be detected by the scan. The whole thing, plus eating a meal, takes 3 1/2 hours. I am shocked, firstly because I thought, as I was told after the exercise test, I would probably need statins. Secondly, I cringe at the thought of having isotope put into my veins! Has anyone ever had this done and is it completely safe?