Late detection of communication between juxtaposed atrial appendages

A 40-year-old woman underwent an atrial septal defect closure with juxtaposition of the atrial appendages without communication between both appendages 4 years before presentation. She recently experienced desaturation on exercise, and right-to-left shunt coming from the residual communication between both appendages was found. The residual communication was closed from the right to the left atrium. Herein, we report a rare case of juxtaposition of the atrial appendages with residual communication between them after an atrial septal defect closure.