RT Journal Article SR Electronic A1 Cunningham, Muriel T1 Atrial Fibrillation JF MD Conference Express YR 2007 FD SAGE Publications VO 7 IS 1 SP 25 OP 26 DO 10.1177/155989770700700116 UL http://mdc.sagepub.com/content/7/1/25.abstract AB Atrial fibrillation (AF) is the most common arrhythmia, yet its etiology is still not completely understood. It is becoming clear, however, that the mechanisms involved in recent onset AF may not be identical to those occurring later in the course of AF. Thus patients' treatment needs vary.