Raw meat odor.

[alvinsujinkim92]

How do you get rid of beef heart smell?

[kelpguy]

well..... u could eat it (joke).

assuming you're asking about fresh beef heart sitting on the counter;  i eat several beef hearts a month and i've never noticed a (get rid of) smell.  i air dried some in the fridge for ~3 months and the smell got a bit more meaty but not all all offensive. 

i get freshly slaughtered beef stuff from the local abattoir and the fat sometimes has a strong smell, which i don't find pleasant, but the fat is a mix of some (fat) items other than the firm white fat from the muscles; i'll check them for off smells next time i order.