Asking Bubbles for Direction: Assessment of a Classic Glenn Shunt Using Agitated Saline Contrast Echocardiography

•Glenn shunt is a common palliative surgery for congenital heart disease.•PAVMs are a frequent complication.•A saline contrast study can show bubbles first appearing in the left atrium.•Treatment options include coil embolization and surgery. Glenn shunt is a common palliative surgery for congenital heart disease. PAVMs are a frequent complication. A saline contrast study can show bubbles first appearing in the left atrium. Treatment options include coil embolization and surgery.