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.
Tetralogy of Fallot (ToF) There are several different heart problems that are in the category of Tetralogy of Fallot. In the most common form, there is a ventricular septal defect and pulmonary stenosis. In Tetralogy of Fallot with Pulmonary Atresia, the pulmonary valve doesnât open at all. Tetralogy of Fallot with Absent Pulmonary Valve can be very dangerous because the pulmonary arteries become so large and take up so much space in the babyâs chest that the lungs canât develop properly.