It might be helpful to know the name of the film on which she was injured. It was her first film, Roseanna McCoy, in which she had the title role opposite Farley Granger who played Johnse Hatfield in the western about the legendary feud between the Hatfields and McCoys.
Her next two films were also with Granger, who played the fiancé of her sister, Ann Blyth, in Our Very Own and a mentally disturbed priest killer in Edge of Doom with Dana Andrews as the priest.
Her parents were playwrights/screenwriters who were friends with Joan Crawford who became her godmother. She married her car dealer husband against her parents' objections in Crawford's home in 1952, the year her mother wrote The Star for Crawford's nemesis, Bette Davis.
Her only other film of note was 1959's No Name on the Bullet opposite Audie Murphy. Her last credit was as a guest star in TV's Laramie in 1961.
She later became a magazine editor and an acting teacher while raising her two children. In an atypical Hollywood manner, her marriage lasted longer than her career. She stayed married to her husband until his death.