I had my stress test yesterday with the injections that I was so worried about, everything went fine. No blockages. No side effects at all from the injections. Thanks for the replies from Jethro and Jim, I think I would have canceled if not for their replies.

lightlady - I really don't know anything about blockages, or the stress test, but just wanted to say I am glad it went well for you. This heart stuff is very stressful!