The idea that I decided I wanted to use for the animation was a internal, tongue-in cheek look inside the body of a person with a heart condition, or particularly unhealthy heart. The narrative would be something along the lines of; the insides of the arteries would be shown, clogged and fatty, leading to show a heart struggling to beat, with a zoom out of a troubled-looking sufferer of this heart condition.
The idea of a small representative character of the heart conditioned person was added alongside what was already thought about. The character would trudge through the fat of the artery and demonstrate the strain associated with heart conditions.

(Above) The 1st attempt at a storyboarded idea, for the animation and narrative.