Pointman,
I had a thallium
stress test last week and there was no blood testing that preceded the
test to determine if I was able to take it.
If we're talking about the same test, they put an IV in you, inject you with thallium, put you under a gamma camera so they can take pictures of your heart at rest. Then you go to the treadmill where they get you up to a defined heart rate, inject you with more thallium, and it's back under the camera.