The Los Angeles County Deputy Coroner, Dr. Juan Carrillo, has ruled Lisa Marie Presley’s cause of death to be a small bowel obstruction.

The only child of rock and roll king Elvis Presley died at the age of 54 in a Southern California hospital on January 12th. According to his autopsy report, the obstruction “was in the form of a strangulated small intestine caused by adhesions that developed” after bariatric surgery many years ago. The coroner ruled her death was a natural death, according to NBC News.

The date of Presley’s weight loss surgery has not been revealed. This type of obstruction is believed to be a common long-term complication of this type of surgery, according to NBC News.

The cause of death was written in the report as “aftereffects of small intestinal obstruction”. Presley’s autopsy report showed no other serious health problems or medical complications.

Presley’s toxicology tests revealed she was taking the pain reliever oxycodone, which inspectors classified as “therapeutic level.” Trace amounts of other substances were also reportedly detected in her blood, but none of these were found to be contributing factors to her death, according to NBC News.

It was previously reported that Presley had been complaining of stomach pains for months before his death.

Presley’s ex-husband, Danny Keough, found Presley unresponsive at his Calabasas home and was rushed to hospital, according to an inspector’s report. Keough took her children to school that morning because she said she had a stomachache. According to NBC News, Presley was already in cardiac arrest when he returned.

Presley suffered a life-threatening heart rhythm while in the hospital and was fitted with a temporary pacemaker.

Doctors performed a brain scan to assess Presley’s condition, and found that she had already suffered a severe anoxic brain injury. According to reports, at 4:48 p.m., her condition deteriorated, after which she went into cardiac arrest and was pronounced dead about 20 minutes later. people. (Related: Lisa Marie Presley’s family reportedly fighting over access to her property)

Carrillo’s report noted that Presley suffered from “abdominal bloating because of her ears” and “did not see a doctor” despite experiencing “abdominal pain in the past few months” before her death. He referred to the fact that Presley also had metabolic acidosis, a buildup of acid resulting from kidney disease or failure.

Presley was buried at Graceland with his father Elvis Presley and son Benjamin Keough.