'Lone Atrial Fibrillation' is a Four Letter Word.

Area of Science:

• Cardiology
• Electrophysiology

Background:

• The term "lone atrial fibrillation" (lone AF) historically described AF without a clear cause, seen in up to 30% of patients.
• Modern diagnostic techniques increasingly identify underlying causes for atrial fibrillation.

Purpose of the Study:

• To challenge the current guideline stance against using the term "lone AF".
• To review the clinical relevance of the "lone AF" concept for contemporary medical practice.

Main Methods:

• Review of historical and current literature on atrial fibrillation diagnosis and classification.
• Analysis of the clinical implications of the "lone AF" designation.

Main Results:

• While most AF cases now have identifiable causes, the "lone AF" concept still holds clinical lessons.
• The historical perspective of "lone AF" can aid current practitioners in patient management.

Conclusions:

• The term "lone AF" may be obsolete from a micro-diagnostic standpoint.
• A clinical examination of the "lone AF" era provides valuable insights for current atrial fibrillation management.