TRANSESOPHAGEAL ECHOCARDIOGRAPHIC DIAGNOSIS OF INTUSSUSCEPTION OF THELEFT ATRIAL APPENDAGE

Intraoperative postbypass transesophageal echocardiography demonstrate d a large pedunculated left atrial mass secondary to invagination of t he left atrial appendage into the left atrial cavity. The base of the mass was between the entrance of the left upper pulmonary vein and the posterior attachment of the mitral valve at the atrioventricular groo ve, and the body of it protruded into the Left atrium and mitral funne l. Retraction of the appendage to its normal position. resulted in. di sappearance of the mass. This diagnosis should be considered when a pe dunculated mass with these morphological features is encountered in th is setting.