"Chaotic electrical activity - Atrial fibrillation is like too many ripples on the pond. The atria convulse with erratic electrical charges. "
See the link for a colorful heart graphic.
"The heart of a patient with atrial fibrillation is like a class of schoolchildren where one unruly pupil left to their own devices will eventually disrupt the whole class"
METAMIA is a free database of analogy and metaphor. Anyone can contribute or search. The subject matter can be anything. Science is popular, but poetry is encouraged. The goal is to integrate our fluid muses with the stark literalism of a relational database. Metamia is like a girdle for your muses, a cognitive girdle.