McMillian is also survived by other relatives. Coliesa admitted that apart from her junk diet and heart blockage, she was also a smoker, which prompted the doctor to immediately ask her to lose 100 pounds to get the surgery. When she eventually went to the emergency room, she was septic, and her kidneys were failing. Our deepest condolences to her family at this difficult time," the statement, which was posted on Twitter, said. When she appeared on the show, she called her heart a ticking time bomb.. If you can help then great. Related: What Happened To Carlton & Shantel From My 600-Lb Life Season 8. On September 22, 2020, at the age of 41, McMillan passed away due to complications from her weight-loss surgery from which she never recovered. Coliesa McMillan, known for her appearance on season 8 of TLC's "My 600-Lb. Cookies help us deliver our Services. What led to the 47-year-old's death is still unknown, but reports indicated that he succumbed to something not related to the surgery. document.write("