Noncardiac entrapment of a pulmonary artery catheter during heart transplantation: inadvertent cannulation and perforation of the internal thoracic vein.

Placement of a central venous catheter into an internal thoracic vein occurs in approximately 2% of all catheterizations. A case in which a pulmonary artery catheter was trapped within the internal thoracic vein during orthotopic heart transplantation is presented.