I can do a remix of one of my beats for you with the heartbeat at the beginning and flatlining in the end, peep my soundclick page there's quite a few medium piano beats:
http://www.soundclick.com/bands/6/a...ibeatsmusic.htm
The best fitting ones might be "Return to Auntie Gray's", "Warrior's Funeral", "Auntie Gray's Attic", "Stained Reflections" and "Dark Before Dawn".... adding the effects you want to any of those is no problem. I've got too many paid requests to do a beat from scratch but hope that helps! Peace.