The main objective of the study is to assess preferences of Non Valvular Atrial Fibrillation (NVAF) patients towards different options of an anticoagulation treatment.

Patient preferences for anticoagulant treatment attributes (convenience attributes only), based on a Discrete Choice Experiment(DCE) interview will be elicited and the impact of switching from Vitamin K Antagonist(VKA) to Xarelto® on Atrial Fibrilation(AF) patient treatment satisfaction will be documented, measured by score differences of the Anti-Clot Treatment Scale (ACTS) score in patients switching from VKA to Rivaroxaban.

Inclusion Criteria:

• Female and male patients ≥ 20 years of age (legal age limit in Taiwan) with a confirmed diagnosis of AF (non-valvular).
• Treatment with VKA for at least 6 weeks.
• Decision to initiate treatment with Rivaroxaban has been made as per investigator's routine treatment practice.
• Written informed consent of the patient.
• Wilingness and capability to conduct two F2F interviews.

Exclusion Criteria:

• Contraindications to the use of Rivaroxaban as outlined in the local product information .
• Concomitant treatment with any other anticoagulants.
• Participation in another study (clinical intervention/observational) within the 3 months prior to enrollment.
• Patients participating in an investigational program with interventions outside of routine clinical practice.

A total of 300 patients will be included in this study. Participating centers are either primary care practices, internal medicine specialist practices or out-patient sites/out-patient clinics