A late complication of the CardioSEAL atrial septal defect (ASD) occluder i
s reported. Although left atrial umbrella was completely epithelialized and
occluded ASD without residual defect, the right atrial umbrella protruded
toward the center of right atrium after 18 months. We believe this may be a
ssociated with the structural abnormality of the device. (C) 2001 Wiley-Lis
s, Inc.