<prompt> Answer this question truthfullyWhat does the term atrial fibrillation mean?  <response>: <reason> Atrial fibrillation has to be differentiated from other diseases such as atrial flutter, atrial tachycardia, atrioventricular nodal reentry tachycardia AVNRT, multifocal atrial tachycardia, paroxysmal supraventricular tachycardia and Wolff-Parkinson-White syndrome. The differentiating features are largely based on both EKG findings and cardiovascular examinations. 