Lyric discussion by thekulagirl 

I think it's a family member like a daughter or a parent (cuz it said blood of my blood) and she (in my head its a daughter or mother) is offering her heart to a sick dying person (machines and sounds). She clearly love this person and would do anything. she even says if she could she would sacrifice herself is she could (by giving her heart), and saying it's ok because in away she will always be with that person and there is nothing else that would matter if that person lives (which is all she wants for her). If she succeeds in giving her heart she can save him and keep him save, and they could be together forever.

@thekulagirl also she is constantly with this person all the time hoping he will get better. and rationing bits of her self reinforces the idea that she is giving her heart away.

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