Good morning, @bettysamny
I just saw this reply and understand it to mean you have sinus node dysfunction? When you go today, make sure you speak with the technician. As I told @bay20740, I am not a medical professional but I spent time researching this information yesterday in regards to their concerns about this particular stress test. The Lexiscan website says it’s contraindicated when you have these symptoms.
However, since both of you have similar conditions and both of your cardiologists have ordered this test, it may be that the warning is one of a broad range and is more a cautionary notice than a serious complication. Similar to a medication when there is a declaration on the box of all possible side effects when it is a very small number of people who react.

I’ve had this scan and it gives a lot of vital information so it may work in conjunction with the other tests you’ve had. Speak with the technician before your procedure. This may be pretty common and nothing to worry about. But you don’t have the luxury of time today to call ahead and ask questions from your doctor. That doesn’t stop you from asking the technician if this is a routine test for someone with Sinus node dysfunction.
I do want to wish you good results today. ☺️ Did you feel a little more comfortable after I explained how the test works?