Conclusion
In conclusion, LAAA is a rare cardiac anomaly. TTE is the primary tool to detect LAAA. TEE, CT and MRI can be used for further examination. When a saccular structure adjacent to the left heart border is encountered, LAAA should be considered. Once LAAA is diagnosed, early intervention is recommended to prevent life-threatening complications, even in asymptomatic patients. As seen in our case, the use of the cardiopulmonary bypass via median sternotomy is an accepted approach, generally believed safe and successful.