Thoracoscopic retrieval of an atrial appendage occlusion device after embolization into the left ventricular outflow tract and damaging the mitral valve requiring replacement.

Embolization of a percutaneous left atrial appendage occlusion device is a rare, but potentially life-threatening, complication. In this report, we present the case of an embolization of such a device into the left ventricular outflow tract causing extensive damage to the mitral subvalvular apparatus and requiring mitral valve replacement. We also describe the first thoracoscopic removal of such a device from the left ventricular outflow tract.