Atrial fibrillation is the most common type of arrhythmia, affecting 40% of the population for more than 60 years. It increases the occurrence of cardioembolic stroke, heart failure, dementia, and death. Anticoagulation is the standard of care for patients at high risk of stroke. Although we made significant progress in treating persistent, permanent, and chronic atrial filtration, lone atrial fibrillation did not receive significant progress compared to other types of atrial fibrillation. In this article, we present a case of lone atrial fibrillation with few presentation to emegancy and never received the right diagosis or treatment and discuss pathophysiology and treatment alternatives..