I want to have a diagnositic test for a baseline of my heart function since I have an autoimmune disease, Sjogrens Syndrome, vasculitis, anemia and GERD. I'm a bit concerned about the nuclear perfusion tests in case something causes the inflammation to flare. Should this be a concern? Which diagnostic test would be best to test for artery blockage the thallium or the MIBI? or should I start with a stress echo? I have had some minor chest pain, a dull pain down my left arm, and some upper central back pain. I don't want to wait until I have a heart attack. My 75 year old dad just had triple bypass surgery last week after an MI. Thank you! Tree