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Congenital absence of the left atrial appendage: a rare anatomical variation with clinical signifi cance

Summary Congenital absence of the left atrial appendage (LAA) is extremely rare. We describe a case of congenial absence of the LAA in a patient scheduled for atrial fi brillation (AF) ablation. Absence of the LAA was found pre-procedurally by transoesophageal echocardiography (TEE) and cardiac computer tomography (CT). During the ablation procedure, the absence was confi rmed by contrast injection at the usual location of the LAA.