describe the sociodemographic and clinical characteristics of patients diagnosed with non-valvular atrial fibrillation (NVAF) at risk of stroke or systemic embolism on anticoagulant therapy who have changed their therapeutic regimen, due to any clinical situation, based on the doctor's routine clinical practice and are currently on treatment with a direct oral anticoagulant (DOAC)

Inclusion Criteria:

• Patients ≥18 years of age diagnosed with NVAF with a risk of stroke or systemic embolism treated in primary care centres.
• Patients on regular treatment with anticoagulants who have changed their ther-apeutic regimen due to any clinical situation and have been on treatment with a DOAC for at least three months before being recruited (date of signing the in-formed consent).
• Patients whose DOAC has been indicated by the primary care physician.
• Patients who have given their informed consent in writing.

Exclusion Criteria:

• Patients who changed their anticoagulant therapy within a period of less than three months before signing the informed consent.
• Patients with cognitive impairment preventing them from understanding what is written in the patient information sheet or the informed consent, or from per-forming the self-administered questionnaires.
• Patients who started anticoagulant therapy for NVAF with a DOAC.

Patients at risk of stroke or systemic embolism on anticoagulant therapy, who have changed their therapeutic regimen according to their doctor's decision, due to any clinical situation and based on routine clinical practice, and who at the time of enrolment in the study have been receiving treatment with a DOAC for at least three months