2006	The patient underwent percutaneous closure of an atrial septal defect.
Every year	The patient underwent cardiac ultrasonography to confirm the well placement of the device.
April 2017	Last unremarkable cardiac ultrasonography. No shunt is present and the device is well placed.
March 2018: day of the admission (9 a.m.)	Incidental finding at transthoracic ultrasonography of severe shunt and atrial septal erosion.
Day of the admission (11 a.m.)	Transoesophageal ultrasound confirms this finding.
Day after the admission (4 p.m.)	The patient is brought to surgery.
Five days after the admission	The patient is discharged without complications.