Left atrial appendage occlusion in non-valvular atrial fibrillation

摘要

The left atrial appendage, an embryonic remnant of the original left atrium, is a long, tubular, trabeculated structure, in continuity with the left atrial cavity. Its unique anatomy predisposes to in-situ thrombus formation, and more than 90% of atrial thrombi in patients with non-valvular atrial fibrillation are believed to originate in the left atrial appendage.