Histological confirmation of complete endothelialisation of a surgically removed Amplatzer ASD occluder

We present histological images of a surgically removed Amplatzer ASD occluder. The device had to be removed because of malpositioning one year after implantation in a 44-year-old woman with ostium secundum atrial septal defect. The excised tissue specimen was fixed in formalin and embedded in the hard resin methylmethacrylate (Technovit 7200, Kulzer & Co, Wehrheim, Germany). Histological slices were …