Hi. You have not really provided much data here. You said that your aortic diameter went from "fine" in 2020 to 4cm now. If your aortic diameter had been stable at 4.0cm for 10 or 15 years, maybe best to leave it alone. But, this does not sound like the case. I have no idea exactly what "fine" means in this case, but you make it sound as if there has been significant enlargement in just about 3 years.
You're getting a mechanical valve, if I understood your previous post. I presume this is because you don't want another OHS down the road. If your aortic diameter is enlarging at a significant pace, and it sounds that way with what little info you have provided, there is a very good chance that you will need a future OHS to correct your aortic aneurysm.
My aortic diameter was only 3.6cm. I only had 20 months of tracking data, so not enough info to determine the rate of enlargement. There was no plan to replace my aorta. However, when my surgeon opened me up and got his eyes on my aorta, he could tell from the look of the tissue that I would likely need another OHS at somepoint down the road. This comes from decades of experience and operating on thousands of valve patients. The tissue just had that look.
He made a tough judegment call and decided to go ahead and replace my aorta. We had a lengthy discussion about this after my surgery as to why he made this decision. He was aware that I was choosing a mechanical valve because I wanted to be one and done. Had I gone tissue, he probably would not have replaced my aorta, because odds are that I would probably need another OHS down the road and my aorta could probably be taken care of at that time. But, since I was going mechanical, with the intention of not getting a future OHS, he made the call. In my view he made the correct decision.
Anyway, that might give you some idea to what I would do if I were in your shoes, but again, not really sure what "fine" means with respect to your aorta's diameter in 2020. The actual data would be helpful.