My dad came home today, so he's doing much better. He can't fly for one month, which has him *thrilled* - he flies back and forth to NY from FL every couple of weeks, or at least once a month, to keep an eye on work. He also can't drive for two weeks, which is going to annoy him - but that may change as he has check-ups, they might let him drive sooner. He has to take his blood pressure and pulse regularly, so he bought a gizmo for that. And he's on a bunch of meds. Low cholesterol diet. Etc.
But he's doing OK now. He just needs to stick to the meds and diet, and work on altering his lifestyle to reduce his stress. *That* is going to be the hard part.