How Did Vera Zorina Die?

Eva Brigitta Hartwig, known professionally as Vera Zorina, was a German-Norwegian ballerina, theatre and film actress, and choreographer, chiefly remembered for her films choreographed by her husband George Balanchine. They include the Slaughter on Tenth Avenue sequence from On Your Toes, The Goldwyn Follies, I Was an Adventuress with Erich Von Stroheim and Peter Lorre, Louisiana Purchase with Bob Hope, and dancing to "That Old Black Magic" in Paramount Pictures' Star Spangled Rhythm.