The Heart Institute in Ottawa is indeed among the very top performers in the world not only for heart surgery, but also for diagnostic, monitoring, and rehab of all heart related deficiencies. We are extremely lucky to have it here.
The stake is very high in this case. For this type of surgery and after-surgery care, Heart Institute in Ottawa is the best choice. Heart surgery cost in US would be much higher than here, unless the doctors are willing to waive their fees (this happened in a few rare cases).