Cha MJ, et al. – In this analysis, the experts aimed to figure out whether an increase in the value of red cell distribution width (RDW) was associated with thromboembolic outcomes in patients with atrial fibrillation (AF). Their findings indicated that an increased RDW value during follow–up could be associated with thromboembolic events in patients with non–valvular AF. The suggested cut–off values for RDW used to predict an increased thromboembolic risk in were ≥13.9% in patients with AF in general, ≥15% in patients with co–existing AF and congestive heart failure (CHF).