Publicist John Blanchette said Sunday that he had spoken with Gabor's husband Frederic Von Anhalt, who had told him of her condition. Blanchette described the situation as "very sad."
Blanchette says Gabor was in surgery for several hours Saturday for the removal of the clots from her upper body, one of them very close to her heart.
Gabor was hospitalized Friday afternoon because she was bleeding and in a lot of pain.
She had broken her hip July 17, had hip replacement surgery and had just returned home from the hospital Wednesday.