ADRIENNE Griffiths, who had a body mass index of 38.5, died of heart failure, a coroner has ruled.
The 40-year-old mum, from Quedgeley, died on February 15 at her Azalea Gardens home.
The healthy BMI range is 19 to 24.
At the inquest into Ms Griffiths' death, coroner David Dooley gave a verdict of death from natural causes as a result of heart failure.
Pathologist Professor Neil Shepherd told the inquest at Gloucester Coroner's Court he was called to Ms Griffiths' home at 1pm on February 26.
"There didn't seem to be any sign of a disturbance or struggle," he said. He said she had a Chinese takeaway with a family member the night before and she spoke not feeling very well.
In a statement from her GP Dr Alan Harris, it was revealed Mrs Griffiths had Type 2 diabetes and chronic obstructive pulmonary disease.
He said she was a smoker, which put her at increased risk of chest infections.
She had been seen last year by her doctor after collapsing a number of times and she had consulted him the day before her death saying she had had a weak arm in the previous week.
A toxicology report found Mrs Griffiths numerous prescription drugs in her system.
The coroner described Mrs Griffiths as a "heavily built woman" and her BMI was revealed as 38.5. Anyone with a rating of more than 35 is classed as morbidly obese, which poses a serious risk to health.
He said: "There were no signs of stroke found in the brain.
"The heart was enlarged but there was no evidence of a heart attack, as such. The liver was enlarged but there was no evidence of any cirrhosis of the liver. Therefore, it was a multi-factorial death.
"There was acute left ventricular failure, so it can be deemed as a natural death."