I have had this test before and it is a piece of cake. I am a type 1 diabetic and also have had a kidney transplant. I was in and out of the hopstial within three hours of the persantinine stress test and we found out I had a narrowing of one of my arteries. It was no big deal at all and I was so glad to have the test done. The worst part of it was getting the IV. I've been a diabetic for 40 years and I still hate IV's. If you need to have this test done, the sooner the better and there is nothing to be afraid of.