Clot or Normal Structure?
How to Identify the Moderator Band
The History
If you flip through Leonardo da Vinci’s anatomical sketches, one detail stands out: he pays unusual attention to the right ventricle. While others focused on the outside of the heart, da Vinci studied its inner architecture. Between 1513 and 1514, he drew a thick band of muscle crossing the cavity of the ox heart, what he called the “catena,”…



