Atrial Fibrillation - Dr. Gregory Marcus | afib |

In order to understand atrial fibrillation, it is first important to become familiar with the basic anatomy and physiology (or function) of the heart. To review, the heart has 4 chambers: the top 2 chambers, called the atria, are relatively small and thin; the bottom 2 chambers, the ventricles, are larger and thicker.

Via Murry Shohat