The objective of this study is to assess the atrial fibrillation (AF) episode detection when using the SJM(St. Jude Medical) Confirm ICM (Implantable Cardiac Monitor).

Inclusion Criteria:

• The subject has been implanted with a SJM Confirm ICM, DM2102.
• The subject has or is suspected to have paroxysmal AF.
• The subject is ≥ 18 years of age.
• The subject is willing and able to provide written Informed Consent (prior to any investigational related procedure).

Exclusion Criteria:

• The subject has persistent (>7 days and ≤1 year or requiring cardioversion), longstanding persistent (continuous AF >1 year) or permanent AF (not attempting to restore sinus rhythm).
• The subject has AF of reversible etiology (e.g. electrolyte imbalance, thyroid disease).
• The subject has a contraindication to Holter recording.
• The subject has already received an active implantable medical device other than the SJM Confirm ICM, DM2102.
• The subject is unable to comply with the follow up schedule.
• The subject is participating in another investigational device or drug investigation.
• The subject is pregnant or is planning to become pregnant during the duration of the investigation.

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