Blalock-Taussig (BT) shunt: a Blalock-Taussig (BT) shunt is a
small, soft tube that lets blood in the body be redirected.
Heart surgeons use
Blalock-Taussig shunts to connect the subclavian artery (a smaller artery that comes
off of the aorta)
to the pulmonary artery. This helps increase blood flow to the lungs.