Echocardiographic assessment of the left atrial appendage

• Published in: Journal of the American College of Cardiology Vol. 34; no. 7; pp. 1867 - 1877
• Main Authors: Agmon, Yoram, Khandheria, Bijoy K, Gentile, Federico, Seward, James B
• Format: Journal Article
• Language: English
• Published: New York, NY Elsevier Inc 01.12.1999; Elsevier Science
• Subjects: Atrial Appendage - diagnostic imaging; Atrial Appendage - physiopathology; Atrial Fibrillation - complications; Atrial Fibrillation - diagnostic imaging; Atrial Flutter - complications; Atrial Flutter - diagnostic imaging; Atrial Function; Biological and medical sciences; Blood Flow Velocity; Cardiovascular system; Echocardiography, Doppler; Echocardiography, Transesophageal; Heart Diseases - diagnostic imaging; Heart Diseases - etiology; Heart Rate; Humans; Investigative techniques, diagnostic techniques (general aspects); Medical sciences; Predictive Value of Tests; Thrombosis - diagnostic imaging; Thrombosis - etiology; Ultrasonic investigative techniques; SEC; SPAF; AF; LA; TEE; AFL; LV; LAA; Sonography; Human; Left auricular appendage; Medical imagery; Exploration; Duplex ultrasonography; Esophageal route; Bibliographic review
• ISSN: 0735-1097; 1558-3597
• DOI: 10.1016/S0735-1097(99)00472-6

The left atrial (LA) appendage is a common source of cardiac thrombus formation associated with systemic embolism. Transesophageal echocardiography allows a detailed evaluation of the structure and function of the appendage by two-dimensional imaging and Doppler interrogation of appendage flow. Specific flow patterns, reflecting appendage function, have been characterized for normal sinus rhythm and various abnormal cardiac rhythms. Appendage dysfunction has been associated with LA appendage spontaneous echocardiographic contrast, thrombus formation and thromboembolism. These associations have been studied extensively in patients with atrial fibrillation or atrial flutter, in patients undergoing cardioversion of atrial arrhythmias and in patients with mitral valve disease. The present review summarizes the literature on the echocardiographic assessment of LA appendage structure, function and dysfunction, which has become an integral part of the routine clinical transesophageal echocardiographic examination.