Intussusception of Left Atrial Appendage through the Mitral Valve

Abstract

A 4-month-old male infant underwent elective repair of a large subaortic ventricular septal defect. Although it was an uneventful surgical procedure, he required inotropic support during weaning from cardiopulmonary bypass. He presented with sudden-onset low cardiac output syndrome in the immediate postoperative period and could not be revived. Autopsy revealed intussusception of the left atrial appendage projecting through the mitral valve orifice.