Originally appeared on the NOVA Web site Cut to the Heart. Let's get straight to the heart of the matter—the heart's job is to move blood. Day and night, the muscles of your heart contract and ...

When combined, data from both provided a color-coded image of the heart surface that captured an entire heartbeat and looked like a weather map in an electrical storm. By 1999, Rudy wanted standout ...

Let's get straight to the heart of the matter—the heart's job is to move blood. Day and night, the muscles of your heart contract and relax to pump blood throughout your body. When blood returns ...