High Quality Content by WIKIPEDIA articles! Alfred Blalock (April 5, 1899 – September 15, 1964) was a 20th-century American surgeon most noted for his research on the medical condition of shock and the development of the Blalock-Taussig Shunt, surgical relief of the cyanosis from Tetralogy of Fallot—known commonly as the blue baby syndrome—with Vivien Thomas and pediatric cardiologist Helen Taussig.