[@Keksalot] Well, I'm not accusing you of anything, but this sort of sounds like a tad bit of god-modding. 

The heart is the vampires main weakness, and it can only be hidden by a sort of armor. By doing this, it seems like you are... how do I say this... making it to where he doesn't have that weakness unless someone just so happens to stab him in the pelvic region.