[MadScientist]

He's also betting less than the full pot. It feels like he hasn't filled up.
The key is Eagles' read that he is too loose pf and goes too far postflop.
I still think the worst cards for you on the river are straight cards. If he bets pot then, I would prolly fold.
If call turn, then def call any heart river or if you fill up.
The worst is like a Q offsuit. It would be hard to tell then if he was bluffing without having been in these spots with him before.
Having said that, pot is laying 2:5 on the turn, so counting hearts, eights, threes, you have like 13 outs, tainted, but you are good right now against a double barrelled semi-bluff which we have all done. So given implied odds, just calling trying to hit those is good.