These are artistic visualizations of chaotic equations which can be used to simulate cardiac rhythm (Circle Map).
I use PhantomJS to render these beauties in the browser with ProcessingJS. My original renderings are 103 Megapixel. I believe these might be the highest resolution images ever rendered in a web browser.
Let me know if you are doing this kind of work, I would love to chat.
The full resolution prints are for sale at my Redbubble gallery.
Here are some crops: