Management strategies for AF have made many advances over the last decade but there is still a great heterogeneity in the management of AF and it remains unclear how often clinicians adhere to current guidelines.

A survey of an updated AF management would enable a timely assessment of implementation of current International guidelines, allow monitoring of early management of AF when a patients is admitted in a Emergency Room (ER) and Cardiology Unit.

Multicentre, observational study. 200 Italian Hospitals fully representing the Italian cardiology reality in terms of geographical distribution and level of hospital technology.

Data collection in ER: Data on AF and Atrial Flutter episodes in ER will be collected retrospectively by checking the records of ER without collection of any data that can allow to identify the patients. These data will be collected under the responsibility of the Cardiology Departments consecutively for 4 weeks.

Data collected in Cardiology: these data will be collected under the responsibility of the Cardiology Departments for 12 weeks consecutively.

Inclusion Criteria:

• All patients with AF, admitted to cardiology wards for an urgent or planned hospitalization.
• All patients admitted in a Day Hospital regimen for treatment of AF The diagnosis of AF must be confirmed by ECG.
• Signed Patient Inform Consent.

Exclusion Criteria:

• The qualifying episode of AF was not documented with an ECG.
• Age <18 years.
• Patients with AF as a complication of an acute coronary syndrome (within 1 week from symptoms onset).
• Patients with AF associated with cardiothoracic surgery (within 1 week from surgery).
• Concomitant participation in other studies that can modify the diagnostic and/or therapeutic treatments.
• Patients already enrolled in BLITZ-AF

All consecutive hospitalized patients with Atrial Fibrillation