I think a high percentage of the time you are ahead here (at limits any higher then this, you are likely behind however and it would be an easy fold). From what I have witnessed at these levels, it is very likely that SB is pushing with either a Q or a K and is afraid of the flush and the BB is smooth calling with the Ace of hearts. That being said I still fold here almost every time and wait for a better spot, because as I am sure you know, your big hands will get paid off at this level. How did it turn out?