Police announced Thursday that the doctors who performed the operation were being investigated for possible treatment errors.
Cora, 23, was in an induced coma in an intensive care ward and her condition was considered grave. It was her sixth breast augmentation surgery to go from F to a G cup, daily Bild reported.
Evidence of a possible offence was provided to police by a paramedic. Medical equipment and medications were seized by police at the scene. Expert medical investigators had been called in.
“By the end of the week, we will in all likelihood begin preliminary proceedings over negligent bodily harm,” said state prosecutor Wilhelm Möllers.
Last year, Cora, from the Hamburg district of Rahlstedt, became famous as a member of the 10th season of the reality programme Big Brother. She spent 43 days in the Big Brother house. She received the award for “Best Amateur 2010” at last year's Venus erotic industry trade fair.
According to Bild, the young woman wanted her increase the size of her silicon breast enhancements from 500 grammes to 800 grammes each. She went to the Alster Clinic, a plastic surgery clinic in Hamburg.
A paramedic filed a report to police that a resuscitation had been performed either too late or incorrectly according to the paper.
Police spokeswoman Ulrike Sweden told the paper: “The state police are investigating the surgeons and the 54-year-old anaesthetist on suspicion of negligent bodily harm.
Cora's agent, Daniel Schiemann told Bild: “She suffered a second heart attack in the ambulance.”
The doctors face up to three years' jail if they were to be found guilty of such charges.