@aero58, I had quintuple bypass at Cedars Sinai in 1996 when I was 46 caused by radiation treatments for lymph cancer years before. I recovered quickly, in four days my twin brother took me home, with a stop at a sushi bar first. I played guitar then and picked up one of mine that day, but age obviously had a lot to do with it.
In 2018 when I was 68, I had to have open heart surgery again to replace two valves also damaged by the radiation. That recovery was much more difficult because Kaiser overdid the anesthesia and botched the incision, plus installed a pacemaker from an improper diagnosis (which I recently had removed). At that time I had switched to ukulele, which took me a few more days before I played one.