So his surgery was at 7 am this morning, and supposed to last 6 hours, at which time we were to be contacted by the hospital to let us know his condition. It's 6 hours after THAT and we still know nothing. We've called the hospital three time, the first two were "we don't know anything, call back later" and the third time we had a nice conversation with a rather shocked woman that there hadn't been any communication: but she still didn't have any information to share with us.
Edit: doc finally called a few minutes ago. They replaced his aortic valve, and bypassed a completely blocked artery, so he did indeed have open heart surgery. There were also two other blocked arteries, but apparently they are minor arteries and can't be fixed. He's going to be in the ICU till tomorrow, maybe the day after depending on how he handles it, then a week in a normal room. So yeah: he lived.