Atrial Septal Defect Stent Compression During Resuscitation of an Infant With Hypoplastic Left Heart Syndrome.

A newborn with hypoplastic left heart syndrome underwent a Norwood procedure with a Sano shunt. A month later, he had an atrial septal defect (ASD) stent placed due to ASD size and flow restriction. Three weeks later, he had sudden bradycardia and cardiac arrest in the intensive care unit. He was resuscitated and cannulated for extracorporeal membrane oxygenation (ECMO) through a right neck approach. An attempt to wean him from ECMO a week later failed due to hypoxia. Echocardiography showed ASD flow restriction and a chest x-ray showed flattening of the left atrial side of the ASD stent from chest compression resulting in a restrictive ASD. The patient underwent surgical removal of the ASD stent with ASD enlargement and was successfully weaned from ECMO after surgery.