PT - JOURNAL ARTICLE AU - Cunningham, Muriel ED - Valderrabano, Miguel TI - Atrial Fibrillation DP - 2007 Jun 01 TA - MD Conference Express PG - 25--26 VI - 7 IP - 1 4099 - http://mdc.sagepub.com/content/7/1/25.short 4100 - http://mdc.sagepub.com/content/7/1/25.full 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.