Tetralogy
From Opengenome.net
The tetralogy of Fallot is a congenital heart defect which classically has four anatomical components. It is the most common cyanotic heart defect and the most common cause of blue baby syndrome.
It was first described by Niels Stensen in 1672. In 1888 the French physician Etienne Fallot accurately detailed its four anatomical characteristics.
