Welcome to Mayo Connect @azcurlygirl ,
I agree 100% with @colleenyoung, I would call the cardiology department and ask. I would also use the patient portal to get a message to your team. The are very responsive in my experience and you will get the answers you are looking for. You mention your appointment is at the Mayo Clinic, is it Rochester, MN? Is this where you had your open heart surgery?
May I ask, did you have surgery for small vessel disease?
Nobody wants open heart surgery, and most certainly nobody wants to go through it again!! Yikes!
I know you must be concerned about seeing some of the results coming back with abnormalities, so to ease your anxious thoughts, contact the cardiology clinic as soon as you can.
I hope you come back and let us know how things are...