[mmcd]

Assuming this is tough enough game that unknowns are generally at least semi-reasonable players, I think this is a pretty bad line. Sure, your flop 3-bet might have cleaned up 2 outs, but a flop cold-call would do much better here.

There's at least a fair chance that the tight/passive player folds overcards for 1 more bet on the flop (especially if he has no heart in his hand) because flop cold-calls from the bb are scary on paired boards. If he does fold, you have a good chance at seeing a free river in the headsup pot. If the tight/passive calls, however, the cold-caller will be pretty much forced to bet the turn if has a pair, but he won't like it much, which means he'll probably fold to a checkraise, and if he's on a semi-bluff with A3 or A5, he'll just give it up and check behind. If the river blanks, you'll have a good shot at picking up the pot with a bet because they'll think you whiffed on a turn checkraise.

As you played it, he's going to put you on either a 2 or a small pair, so you'll probably get raised on the turn a lot, even when he only has A3 or A5.