There is no one best
It is a common belief that people have that if they are going to have a significant procedure done, then they will look on line, find the 'best' one, and won't give up until they get an appt with that doc in that hospital.
I have found, in general, that those are the worst scenarios. Find the heart
surgeon that specializes in the particular heart procedure u need, and go where he/she recommends.