Transcatheter closure
Percutaneous closure of such defects with catheter-delivered devices has been extensively explored in select institutions.19-21Delivery in the catheterization laboratory by percutaneous femoral exposure is generally limited to older children weighing more than 5-10 kg, to minimize femoral vessel injury. The size of the Amplatzer muscular defect occlude ranges in size from 4-18 mm.19-28 Depending on the location, number, and size of the muscular defects, several technical details need to be taken into account. The proximity of the tricuspid valve for defects located below the moderator band may cause entrapment of the sheath in the chordal apparatus.