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. (Level of Difficulty: Intermediate.).
Keywords: 3-dimensional imaging; ASD, atrial septal defect; LAAC, left atrial appendage closure; PFO, patent foramen ovale; TEE, transesophageal echocardiography; atrial septal defect; echocardiography; iASD, iatrogenic atrial septal defect; pulmonary hypertension.
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