Migration of a ventriculoperitoneal shunt into the pulmonary artery.

Ventriculoperitoneal (VP) shunts have been reported to migrate into a number of unusual locations within the abdomen, chest, and pelvis. We report a case in which a documented, correctly placed VP shunt subsequently migrated to an intravascular location. This intravascular migration led to malposition of the shunt tubing within the pulmonary artery. Attempts to remove the catheter via a postauricular incision were complicated by arrhythmias induced by traction on the shunt tubing. Eventual removal of the shunt was accomplished in stages, through the use of an intravascular, radiographically guided snare, introduced through the femoral vein.