Primary strategy is to include only patients with NVAF who are to be treated with edoxaban according to Package Information (Summary of Product Characteristics (SmPC)). To ensure that the physician's prescribing behaviour will not be influenced, patients may only be included after the treating physician has made the clinical decision to prescribe edoxaban. Patients must have provided written informed consent for participation in the study (ICF) and should not participate simultaneously in any interventional study.