Sonja is a fictional character from the Underworld series of films. This character is the daughter of the vampire elder Viktor, introduced by flashback, in Underworld. Red Sonja, the She-Devil with a Sword, is a fictional character who first appeared in Conan the Barbarian #23 (Marvel Comics).
tetralogy (plural tetralogies) 1  A set of four works of art that are connected, and that can be seen either as a single work or as four individual works. They are commonly found in literature, film, or video games. ( 2 medicine) A combination of four symptoms.
What is tetralogy of Fallot? Tetralogy of Fallot (TOF) is a serious, congenital heart defect, affecting about two in 10,000 babies. In TOF, the abnormal connections prevent enough oxygen-poor (blue) blood from flowing to the lungs as it should. As a result, a person with TOF has a lower-than-normal amount of oxygen in the blood and typically, surgical correction is necessary.