This procedure consists of diverting the superior vena cava return into the pulmonary arteries and connecting the vena cava inferior to the pulmonary arteries. This action is achieved either by the construction of a composite conduit made of the sinus venarum and a prosthetic patch (intracardiac total cavopulmonary connection or lateral tunnel) or by an extracardiac conduit (extracardiac total cavopulmonary connection).