Vizzardi, M E A case of thrombus outside a ligated left atrial appendage despite prolonged oral anticoagulant therapy. [electronic resource] - Minerva cardioangiologica Jun 2008 - 377-8 p. digital Publication Type: Letter ISSN: 0026-4725 Subjects--Topical Terms: Anticoagulants--therapeutic useAtrial Appendage--diagnostic imagingAtrial Fibrillation--complicationsCatheter AblationEchocardiography, TransesophagealHumansThrombosis--diagnostic imaging