title: Modified Blalock-Taussig operation using polytetrafluoroethylene (Impra) grafts.
mesh_terms: D001807:Blood Vessel Prosthesis; D006330:Heart Defects, Congenital / Q000601:surgery*; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D011138:Polytetrafluoroethylene; D014656:Vascular Surgical Procedures / Q000379:methods*
chemical_list: D011138:Polytetrafluoroethylene