if I were you, I would address this on multiple levels. Of course you should use herbs, homeopathy, and/or other natural healing methods. But I would also look at this from a spiritual/emotional perspective.
The physical heart really IS connected to our deepest emotional states. There is something wrong with your physical heart, often times because there is something wrong with your emotional heart.
If I were you I would get a book by louise hay called 'you can heal your life' or any other great book by her
here is a great site with some excellent information along these same lines