Atrial fibrillation, a common cardiac arrhythmia, results due to uncoordinated atrial activation accompanied by deteriorating atrial mechanical function. The Animated Atlas of Atrial Fibrillation is a comprehensive collection of videos pertaining to the anatomy of the heart, its electrical systems, cardiac arrhythmias, and atrial fibrillation – causes, symptoms, risk factors, complications, diagnosis and treatment, including implantable devices.