I would not want to get a TAVR at a place that does100 open heart cases a year (most of which would likely be CABGs).
You need to be prepared to do valve in valves, alternative access (transaortic, subclavian, transapical), crash on to bypass, understand the risk of and prepare for complete heart block, etc...
Sure we all need to start somewhere, but I would guess that morbidity and mortality will be higher at institutions that have low numbers of caths, tavrs and valve cases.
Having been part of a TAVR/Mitral clip start up program, there is definitely a learning curve and complications do happen.
We now can do 5 TAVRs by 5pm and 4 by 3pm. Volume of cases has made things safer as well as having a dedicated multi-diciplanatary structural heart team that reviews cases pre-op and post-op. (cardiac anesthesia, cardiac surgery, cardiology, radiology amongst others)
The more you do per year the better you get at it.
I want to get my TAVR at a the program that does 100-200+ tavrs a year. Not the one that does 10. That is just nonsense and a way of putting your patients at uneasesary risk.
My 2 cents