Knee Surgery

I had a knee replaced a little over 10 years ago. Needless the other knee wore out and needs replacing and soon. I thought wow lets get it done but was I wrong. First pre-surgery physical must be performed by heart specialists so you don't die while they give you a new knee. That's all well and good but it means another month of 24/7 pain before they do it. With no other choice I guess I'll wait for the tests.