Our rationale of creation of this registry stems from the fact that the use of VKA in patients with AF is a double-edged sword, physicians face tremendous burden in assigning patients with VKA, due to risk of Bleeding complications despite its potential benefit. We intend to seek a safe and beneficial range of INR on Indonesian patients.

Inclusion Criteria:

• Age >18 years old
• Diagnosis of valvular or nonvalvular AF

Exclusion Criteria:

• Reversible AF
• Patients who have been enrolled as a respondent on other clinical studies

This is an observational study on AF registry, in which all AF patients in our hospitals that fulfilled inclusion and exclusion criteria will be input as respondents to the registry. There are two respondents for this registry, cohort, and no cohort. Noncohort registry respondents are AF patients at hospitals who fulfilled inclusion and exclusion criteria who did not consent for a 24 month follow up. Baseline characteristics of these respondents will be put to eCRF according to their hospital medical records. Patients who fulfilled inclusion and exclusion criteria who consented for a 24 month follow up were called cohort registry respondent. These respondents will be followed up at 6th, 12th and 24th month.