Successful cardiac ablation for AF
Documented freedom from AF recurrence (symptomatic or asymptomatic arrhythmic recurrences lasting longer than 30 seconds) 3 months after successful cardiac ablation (AF recurrence during 3-month blanking period is excluded).
Patient must have been on a commercially approved anticoagulation therapy for at least two (2) months prior to randomization in the OAT Study.
CHADS2 score = 2 or CHA2DS2-VASc score (=3)
Left ventricular ejection fraction > 25%
LA size < 65
High risk for thromboembolic events (i.e., CHADS2 score = 2 or CHA2DS2-VASc score = 3) and require OAT before undergoing cardiac ablation
Able and willing to comply with all pre- and follow-up testing and requirements
Signed informed consent form
Age 18 years or older

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Procedure
cardiac ablation
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Condition
AF
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Qualifier
Successful
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Negation
freedom
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Condition
AF recurrence
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Condition
arrhythmic recurrences
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Value
longer than 30 seconds
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Temporal
3 months after successful cardiac ablation
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Reference_point
cardiac ablation
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Drug
anticoagulation therapy
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Temporal
at least two (2) months prior to randomization
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Reference_point
randomization
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Measurement
CHADS2 score
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Value
= 2
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Measurement
CHA2DS2-VASc score
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Value
=3
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Measurement
Left ventricular ejection fraction
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Value
> 25%
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Measurement
LA size
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Value
< 65
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Observation
risk for thromboembolic events
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Value
High
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Measurement
CHADS2 score
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Value
= 2
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Measurement
CHA2DS2-VASc score
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Value
= 3
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Drug
OAT
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Temporal
before undergoing cardiac ablation
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Reference_point
cardiac ablation
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Scope
CHADS2 score = 2 or CHA2DS2-VASc score = 3
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Person
Age
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Value
18 years or older