Figure 1.

Steps in the transcatheter closure technique with the Amplatzer muscular ventricular septal defect occluder (AMVSDO) in an 11 year old patient with a large high pulmonary artery pressure persistent ductus arteriosus (PDA) (patient 3). (1) Descending aortogram in the lateral projection showing a large PDA measuring 10 mm in diameter. (2) Deployment of the retention disc of a 12 mm AMVSDO opposite the orifice of the duct. (3) Pulmonary arteriogram in the cranial projection showing good position of the device with no obstruction of the pulmonary artery. (4) Descending aortogram 10 minutes after release of the device, revealing complete closure with good device position.