Introduction
The Blalock–Taussig (BT) shunt in the tetralogy of Fallot was first performed in 1946. [1] It has been improved to create a short circuit in the pulmonary artery by using an artificial blood vessel. Spontaneous prognosis after only this surgery is poor, and radical surgery is necessary to improve the long-term prognosis. However, for various reasons, some patients have only undergone surgery and not any therapeutic intervention. In this report, we describe a case of central shunt surgery to improve cyanosis in a patient who had been followed-up for a long time without radical surgery after an original BT shunt.