From the case:
Blalock-Taussig shunt (annotated image)
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This is a left modified Blalock-Taussig shunt (also known as Blalock-Thomas-Taussig or BT shunt) in a Tetralogy of Fallot patient. There is a prosthetic graft interposed between the left subclavian artery and ipsilateral pulmonary artery.
Case Discussion
Blalock-Taussig shunt (also known as Blalock-Thomas-Taussig or BT shunt) is a palliative procedure performed in patients with tetralogy of Fallot (prior to the ability to repair the defect) to increase the pulmonary blood flow.
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