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.