Donda West, the mother of rapper Kanye West, died of heart disease while suffering "multiple post-operative factors" after plastic surgery, the L.A. coroner said Thursday.

But an autopsy failed to determine the exact role these factors played in her death following liposuction and breast-reduction surgery, officials said.

West, 58, died on Nov. 10 at Centinela Freeman hospital after friends and family made a frantic 911 call for help from her home in Playa Del Ray.

"The final manner of death could not be determined," the coroner said in a statement. "Multiple post-operative factors could have played a role in the death. The exact contribution of each factor could not be determined. There was no evidence of a surgical or anesthetic misadventure."

Just a day before her death, West had undergone cosmetic surgery with Dr. Jan Adams, who has faced tremendous scrutiny since West died. At the time her death, a family spokesperson said West had passed away "as the result of complications from a cosmetic surgical procedure."

West had been on the faculty of the English Department of Chicago State University for over two decades before retiring from academia to manage her son's career. She recently published Raising Kanye: Life Lessons from the Mother of a Hip-Hop Star. Her only son, in turn, dedicated his song "Hey Mama" to her.