In my opinion passing 5♥ X with the north hand facing 17-19 with 5♠ is absurd. 5♠ wont go down more than once and might easily make. I cant imagine getting more than 3 tricks against 5♥ X and this contract might make easily, too.
Partner bid 3♦ although he seems to hold 4♠. If he has 6♦ game should have good chances as i sit behind the opening bidder. Hopefully i will only lose a club and a heart (the spade loser will be discarded on my established hearts).
i hate the 4♦ bid (INV, which doesnt seem like a reasonable treatment) facing 64 in ♦♠ with 11-15. North has a monster and must force to game. 4♣ looks rather obvious and after that bid slam will be reached easily.
By the way i wouldnt have ...