[Nate.]

piggity--

If you're confident in that read preflop, then fold. If you're still confident of it on the river, then you beat 3 of 9 combinations of {AA, KK}, and you're getting 12ish:1, so you need to be pretty sure he wouldn't be way disproportionately unlikely to do that with nonheart AA to fold. I'd call.

All that said, often when people report reads like the one you claim to have on this guy preflop, they're either exaggerated or results-oriented reports. Not to doubt you specifically, of course.

--Nate