Heart don't fail me now

[Fattima]

I would like some help translating lyrics

"Heart don't fail me now! Courage don't desert me!"

I was thinking: Cuore no falirmi ora! corraggio non abbondonarmi!

I'm not sure if that makes any sense in Italian!

 

[Danieloid]

I'd say:
Resisti/reggi, mio cuore! (or: Mio cuore, non cedere adesso!) Coraggio, non abbandonarmi!