Arrhythmia
Roshan Sharma

The four chambers of the human heart work together to keep blood pumping to the rest of the body. They coordinate using electrical signals which originate periodically from the top right of the right atrium (one of the heart's chambers). In pathological conditions, the improper genesis or traversal of these electrical signals can cause an abnormal or irregular heart rate. This is referred to as an arrhythmia. A commonly studied arrhythmia, especially through computer simulations, is known as an atrial micro-reentry, where the electrical signal ends up perpetually circling around a small stationary or moving point in the right atrium (or left atrium, another heart chamber).  In this video, all cycles of a right atrial micro-reentry are added together and played in one cycle.