Lexiscan...

Last night when i came home from dance classes, Terry said that the doctor called and said she ordered another heart test for me and also will get me an apt with the heart doctors soon. The extra test she ordered is called a lexiscan. Have any of you ever had one done before?  What bothers me is that I don't know why she ordered it. I don't know if something came up in my blood work, or if she is just doing this as an extra precaution for me to just double check things. My apt is scheduled for 1 on Wednesday. They inject a drug into me and it enlarges my blood vessels so they can see if there is any problems at all. This would detect it. So please pray for me tomarrow that I have no bad reactions at all to having this test done and that all goes great!  Thanks prayer warriors!