That's good news. Cleveland Clinic is in high demand, and we have had members that were in need of surgery, but had to wait a few months due to how many desire to have their procedure with them. Your original cardiologist told you to get surgery by the end of the year, so this will certainly be within his recommendation.
There are threads here about things to bring and what to do pre-surgery, so you might want to check those out.
Here is a thread about what to bring with you to the hospital with 17 years worth of member contributions, which you may want to check out:
https://www.valvereplacement.org/threads/what-to-take-to-the-hospital-a-checklist.13616/
Best of luck and please keep us posted and feel free to ask any questions. Also, please keep us posted on how you are doing post surgery.