Figure 4 :Transesophageal echocardiography pictures during implantation. a) The left atrial disk is seen deployed in the left atrium coming in a parallel fashion toward the septum. b) The left atrial disk is seen very close to the septum and the waist is within the defect. c) The right atrial disk is seen deployed in the right atrium still attached to the delivery cable. d) The device is seen in a perfect position after it had been released from the delivery cable. There is no prolapse of the device through the anterior rim of the defect