From The Vintage News:
Lyudmila Todorova Zhivkova (1942 – 1981) was the daughter of Bulgarian Communist leader Todor Zhivkov. Primarily known for her interest in preserving and promoting Bulgarian arts and culture on the international stage, Zhivkova was also a controversial figure within the former Soviet Bloc because of her interests in esoteric Eastern religion and spirituality.
Zhivkova died at the age of 38 from a brain tumor. Unsubstantiated rumors continue to circulate that perhaps Zhivkova was murdered by those who disapproved of her esoteric interests.
The official cause of death was a brain hemorrhage. Some suggest that the 1973 car collision finally had killed her. Others say it had been a subtle, slow-acting poison (a precursor of the Litvinenko death, perhaps).
Varying accounts describe her as having been depressed in the weeks before her death and having reverted to conventional medicine, including sleeping pills.
Others say that she had been in fine form. They recall her repeating, even in the final days before her death, what had become a favorite saying: “Think of me as fire”.