Hi
I'm not sure if I "properly" meet your criteria for a open heart 3rd valve valve operation because I was 10 or so on my first and don't really remember it well. None the less ...
I had my 3rd in 2011 (2nd in 1992) and things have gone fairly well (from a cardiac perspective) since then. I felt a bit blase about it going into the pre-surgery and was more concerned about my wife who was totally new to this (she knew of my surgeries, but had not been with me through them).
I noted some differences in how they do things now (like I was up and shuffling around the nurses station in ICU).
Aside from the infection from propioni (which took a year to surface) I have had no post surgical issues Sternum healed well (thank the gods) and I just took it one step at a time with a clear focus on "I want to get better for our life together"
I did my exersizes as told and waited to do things till I was told was OK.
It really was "by the numbers" with everything except the surgical infection.
I was told (pre surgery) that there was a lot of scar tissue around my heart from previous surgeries (which didn't surprise me in the least) and that was re-iterataed to me post surgery too (from the operating surgeon). They missed the AV node nerve (a good thing) and so I didn't end up on a pacemaker.
For all those reasons I steered towards a mechanical valve on this operation.
Recovery seemed "textbook" and actually gave me some reminders of what the previous one had been like (I'd not thought much about it after having it done, went straight to Uni and then into job hunting in 1993 so I'd pretty much only paid attention to what as in front of me not behind.
Nothing was "worse" than I remembered.
I think you'll be fine
What is the "driver" for this latest operation?