WIP Anatomical Heart Icon

WIP - Always wanted to try and do an anatomical heart as I think they look so awesome. This needs a lot of work (obviously, but it is a start. I do like the smaller sizes better, looking for suggestions as always. Original source material which I based the outline on is: http://www.dragoart.com/tuts/3203/1/1/how-to-draw-a-human-heart.htm