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.
See enlarged image. Tetralogy of Fallot occurs when there is underdevelopment of the right ventricular infundibulum or conus. Ventricular septal defect, right ventricular outflow tract obstruction, right ventricular hypertrophy, and overriding of the aorta are the four abnormalities classically described. Tetralogy of Fallot comprises a spectrum of severity.