This can be a risky surgery. They MAY BE great surgeons but I would ask for proof - data. How does he know? What is he basing this "opinion" on?
One renown surgeon at a high volume hospital told my husband and me that my husband should absolutely have his 4.8 cm ascending aortic aneurysm repaired now. We started to ask questions: Do you use antegrade or retrograde cerebral perfusion? What are your stats? (They have these statistics!!) No answers were forthcoming. We transferred to another older and wiser surgeon on the same staff whose opinion was that surgery was not appropriate for my husband at this juncture.