Left atrial appendage aneurysm is a rare anomaly, which usually present in adulthood. Most patients are asymptomatic, however they often suffer from palpitations which usually grows out of atrial tachyarrhythmias. The main manifestation of the disease is usually systemic embolism. The major manifestations of such aneurysms are an abnormal cardiac silhouette; therefore cardiac tumors or pericardial cysts should be considered in the differential diagnosis. Various imaging techniques are useful in diagnosis and allow the differential diagnosis among other pathologies. Resection of the aneurysm is the recommended form of treatment. In this article, we present a 66-year-old female case with aneurysm of the left atrial appendage. The patient was admitted with atrial fibrillation and recurrent systemic embolizations. Diagnosis was based on transthoracic and transesophageal echocardiography. The patient was treated by surgical resection of the aneurysm under extracorporeal circulation.

Keywords : Left atrial appendage aneurysm, systemic embolization; thrombus