Dear Editor, atrial fibrillation (AF) is the most frequent sustained arrhythmia observed in clinical practice. Still now, thromboembolic stroke is the most relevant acute clinical complication of AF. Indeed, the incidence of such an event significantly grows with age, reaching 8.9% at five-years in those older than 85 years. Moreover, AF can be observed in 24% of patients presenting an embolic stroke of undetermined source (ESUS) when using a monitoring technique with an appropriate recording length [1].
