My Dad also had open heart surgery, had a bovine valve installed. I've also noticed he's not all there, compared to the old days. I like the new Dad better, he's much more pleasant, and a lot less sarcastic.
Anyhow, I'm happy to share what I know, so you can have a good conversation.
Christopher A. Young Learn more about Jesus
Bit more back ground. I'm a long retried engineer (EE) that worked my way through engineering school doing a lot of interesting jobs that taught me a little bit about many things. So I still have a lot of interest in a lot of things all just for fun. Basically if it ain't broke given enough time I *can* break it ... I will learn a lot in the process.
Some years back I had emergency open heart surgery. Part of the outcome of that (other than staying alive) is the loss of some cognative ability and motor skills.
For this and other reasons I no longer do more than a triage on broken stuff/systems. The really simple stuff I can fix. The rest I leave to those who are sharper than me and more important have the right toys.
Since I can no longer, safely, do the heavy work I'd like to get back to the point where I can 'talk/discuss' a good fix.