Spontaneous mechanical aortic valve leaflet dislocation during implantation

Acute or delayed mechanical valve fracture with possible migration is a rare problem seen after valve replacement. We report a patient where mechanical aortic valve leaflet detachment was encountered during implantation. The missing leaflet was retrieved in the left atrium at the level of the right lower pulmonary vein. This has not yet been described, and prompt recognition and intervention is warranted.