Sounds like something that NASA would do. But, in the event you find yourself in an office with a cardiologist, and they mention one of these, it means they are looking for arterial blockages of the heart. The nuclear stress test allows the doctor a clear view of all areas of the heart where blockages might occur. I also learned that they use this test to review stents and valve repairs to be sure they are still working.
Before you go, you'll fast for at least 6 hours and have no caffeine in your system for at least 24 hours. So expect to have a headache and be hungry. And, if you take a beta blocker or other heart medication, you skip those; though prednisone is ok.
1. The first step is to put in an IV line, then they inject you with a radioactive isotope that will help highlight all of the arteries and veins of the heart when they do the imaging.
2. Wait
3. The first image takes about 10 minutes. You sit in a big chair with your arms elevated and stay very still as the chair rotates and the images are taken.
4. Wait
5. Treadmill test. They place a bunch of monitors on and watch your blood pressure as you walk on flat and hilly surfaces.
6. Second injection of radioactive isotope.
7. Wait
8. Second set of images. This is done in about 3 minutes, but same as #3.
9. Wait
10. Get preliminary results from the doctor.
In my case I also had to make a second appointment for an EKG and ultrasound because my heart decided to be funky during the treadmill test. Will learn more on this later.
In the interim, no blockages, so that's good! My husband was quite relieved, because I warned him that if 20+ years of vegan diet and exercise and low weight ended up with heart blockages, there would be much yelling and screaming happening.
I'm not happy about having to go back. But, I am trying to just take this stuff one step at a time. The Sarcoid thing is difficult and sometimes scary, but I'll just keep living my life and throwing in the doctor appointments as I have to.