An infant with tetralogy of Fallot who has multiple hypercyanotic spells will likely have a procedure to ensure pulmonary blood flow until surgical repair is performed. Which of the following is this procedure?

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The Blalock-Taussig (BT) shunt or modified BT shunt is a procedure used to increase pulmonary blood flow in children with congenital heart defects like tetralogy of Fallot, especially in those experiencing hypercyanotic spells. This procedure temporarily augments blood flow to the lungs, allowing for better oxygenation until a more definitive surgical repair can be performed.

An Infant with Tetralogy of Fallot Who Has Multiple Hypercyanotic