During the recent years, the term ESUS (embolic stroke of undetermined source) is used to describe patients with ischemic stroke for whom the source of embolism remains undetected despite recommended investigation [1] Although ESUS patients represent a very heterogeneous population in terms of the underlying stroke mechanism, atrial fibrillation (AF) is frequently detected and therefore, prolonged cardiac rhythm monitoring is recommended [1–3] However, only a minority of ESUS patients receive prolonged cardiac monitoring, mainly due to limited availability of technical and human resources, and the considerable cost of some of the available monitoring options [4].
