No, the Term "Chronic AF" Should Not Be Used
The term "chronic atrial fibrillation" has been officially abandoned and should not be used in clinical practice. 1, 2
Current Terminology for AF Lasting 1 Year
For atrial fibrillation that has been persistent for 1 year, the correct classification is "long-standing persistent AF", defined as continuous AF for >12 months in duration. 1, 2
Why "Chronic AF" Was Abandoned
The 2023 ACC/AHA/ACCP/HRS guidelines explicitly state that "chronic AF" is a historical term with variable definitions that should be abandoned. 1 The European Society of Cardiology 2024 guidelines echo this recommendation. 2
The problem with "chronic AF" was its lack of standardization—different clinicians and studies used it to mean different things, creating confusion in clinical care and research interpretation.
The Correct Classification System
Use this temporal classification framework instead:
- Paroxysmal AF: Intermittent, terminates within ≤7 days
- Persistent AF: Continuous, sustains for >7 days and requires intervention
- Long-standing persistent AF: Continuous for >12 months (this is your 1-year case)
- Permanent AF: A joint patient-clinician decision to stop attempting rhythm restoration
Critical Distinction
Long-standing persistent AF differs from permanent AF in one key way: with long-standing persistent AF, rhythm control remains a treatment option in selected patients, whereas permanent AF represents acceptance of the arrhythmia as a therapeutic decision, not a pathophysiological state. 2
Clinical Implications
This distinction matters for treatment planning. Research shows that once AF persists beyond 1 week, outcomes worsen compared to AF that terminates earlier, but duration up to 1 year doesn't significantly affect ablation success rates differently. 3 However, the classification as "long-standing persistent" (>12 months) helps predict substrate changes and guides therapeutic decisions about rhythm versus rate control strategies.