Sure, three of them, and they never showed anything, even just before my heart attack and just before I needed another stent. All I got was another dose of radiation, which I needed after 65 grays of cancer treatment, which I recently found out I didn' need either.
I refuse nuclear stress tests routinely now. (They love to prescribe them anually.) If I get to the point I can't walk across the parking lot again I will insist on another cath - which is the only way they've ever diagnosed anything for me.