I've done a bit of Adenoscan and Dobutamine scan, not much worry with adenoscan coz its half life is short, but with dobutamine scan you could see all sort of scary dynamic ECG changes (ST going to BCT or to Acute Ischemic Changes). Because you can't leave these patients but still you need to have a support from these people or you could asked for advice and help. Good Luck with your course.