Hemodynamically significant iatrogenic atrial septal defects after cryoballoon ablation

Left atrial procedures requiring large sheaths and manipulation within the left atrium are increasingly common in electrophysiology. Iatrogenic atrial septal defects (iASD) created for these procedures are generally benign and do not require closure. In this report we describe 2 hemodynamically significant atrial septal defects (ASD) that occurred after cryoballoon ablation for pulmonary vein isolation.