It simply doesn't work, the heart just gets blasted away and that's that.

Your still using the old method. With 1.10.2 you will use the new infusion process. I believe on the Curse site there is a video sowing how the Infusion process works. You will have to scroll down a bit.

Correct in 1.10.2 it is a fusion crafting recipe. Look in the information tablet for info.