Despite the fact they had him up and trundling along corridors within 48 hours of the surgery, FIL is having some (hopefully minor. Hopefully very very minor indeed) complications with his heart’s electrical signals. Apparently it’s common after heart surgery, and usually goes away by itself after a few days. If it doesn’t, FIL will need to be hacked back open so they can stick a pace-maker in. Oy fucking vey. So they are keeping him in hospital for a few days longer than he had hoped, and he, being the bouncy live-wire that he is, is going stir-crazy.