Demographic Outcomes, and Health Care Resources in Newly Diagnosed Non Valvular AF Patients

Inclusion Criteria: * 1\. All male or female patients aged 18 years and older at the date of inclusion. 2\. Patient newly diagnosed \[within the recruitment period (estimated to be 6 months) and 90 days before the baseline visit\] with atrial fibrillation (AF) and for whom treatment has started by the caring physician for the prevention of stroke/systemic embolism. 3\. Signed informed consent. Exclusion Criteria: * 2\. Severe psychiatric illness or other disease or circumstances that could compromise participation in the study. Patients will not be enrolled if major difficulties with follow-up will be anticipated, for example, patients with no valid residency permit or those planning to leave the country before the next scheduled follow-up. 3\. Current participation in an interventional clinical trial at baseline. 4. AF with a generally reversible cause defined as non-cardiac surgery, post-cardiac surgery (AF within 3 months after surgery), hyperthyroidism, pulmonary embolism, pneumonia and acute myocardial infarction. 5\. Mechanical heart valves or valve disease expected to require valve replacement. 6\. A medical condition other than AF for which chronic use of VKA/NOAC is indicated. 7\. Pregnant or breast-feeding women. Pregnancy to be ruled out according normal practice method of each site.