Closure of Iatrogenic Atrial Septal Defect After Placement of Left Atrial Appendage Closure Device.

An 86-year-old woman experienced hypoxia with right-to-left flow across an iatrogenic atrial septal defect after deployment of a left atrial appendage closure device. Emergent closure of the defect was performed with an atrial septal occluder device with resolution of hypoxia. ().