The heart stress was not at all what I expected. I thought that I would be on a treadmill huffing and puffing with electrodes and beeping, like Tim Allen in The Santa Clause.
Instead, I had to undress and put on a couple of hospital gowns and endure a couple of injections. The first injection was a substance that the nurse said was like liquid tin that would prepare my red blood cells for the second injection. Thirty minutes later, I got the second injection, which was a radioactive substance that stuck to my red blood cells. Then the nurse quickly popped me under some kind of xray camera thingie and took pictures for about 20 minutes. Afterward, I got to watch a black and white movie of my heart pumping away in my chest.
My heart is strong, and I ought to be able to have the Doxorubicin. Of course, I have to wait for official word from the doctor.