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.