The problem with cardio rehab in my area was the lack of openings at the two places within reasonable distance. Mayo contacted an excellent place and the wait was two months and 6+ weeks at the place my cardiologist contacted 2 weeks after surgery. I did go to the second place for 3 visits; my regular gym is owned by people who used to work there. Except for the heart monitor, I did the same exercises under their supervision starting 2 weeks after surgery. I was active before surgery, so by the time I went to official rehab I was able to walk 3.1 mph on the treadmill for 40 minutes as well as be most of my way back for much of the other routine. I highly recommend cardio rehab!