Gary Henry posted a note for Joan that says:
I had my surgery at Cleveland Clinic by Dr. Gillinov on July 22, 2020. I have nothing but praise about the entire procedure and stay there. Excellent and I don't think you could do any better.
I too did some research and on the internet there are good resources. One of those the the STS database
(Society of Thoracic Surgeons) which maintains a database on mortality and morbidity regarding cardiac surgeries at various hospitals and groups. Cleveland Clinic has the best ratings among the hospitals in the database. Mayo may be a better hospital, but for this particular procedure the Cleveland Clinic was number one.
I am sure either one would be a good choice but I went with the statistics.