Kanye West is wracked with guilt over the death of his mother, believing the cosmetic surgery he paid for killed her. A recent inquest confirmed the tummy tuck and liposuction Donda West underwent the day before she died in November (07) didn't contribute to her passing. She died from a "pre-existing coronary artery disease". But the rapper still blames himself for encouraging his mother to go under the knife. A source tells the National Enquirer, "It was his money that paid for the operation and his fame that opened up this very different world to Donda. "Donda was so proud of Kanye and all he had accomplished, and gave up her job as the head of Chicago State University's English department to look after his career. "It would never have occurred to her to have plastic surgery before Kanye hit it big. He can't help thinking it shouldn't have happened."