My 83 yo DF has been advised to have surgery for a slowly widening aneurysm at his ascending aorta (likely associated with the congenital aortic valve problem he has).
The whole issue was found incidentally some 10 years ago, he is entirely well, VERY active (think cycling, chopping his own firewood, climbing trees to saw branches off and falling off etc etc), never smoked, not diabetic, not overweight etc etc.
Surgery is now recommended as it has been widening and obviously if it pops, he'd be dead before he hits the floor 
I'd really appreciate any stories of how an elderly person in your life recovered from such an operation??
His cardiothoracic surgeon is suggesting a minimally invasive approach with a small cut near his collar bone, going down to access the heart/aorta, so no huge cut through breastbone/ribs.