Mrs Smith, from Braunton, had first gone to the North Devon District Hospital in Barnstaple with persistent headaches, vertigo and numbness in the face. They were symptoms of two deadly enlarged blood vessels putting pressure on her brain.
When the aneurisms were detected, the mother-of-four was referred to Plymouth's Derriford Hospital.
Mrs Smith's daughter, Beverley Hopkins, was determined to discover what had happened with her mother's care at both the North Devon Healthcare NHS Trust and Plymouth Hospitals NHS Trust and took legal action.
"We were all devastated by her death but when I wrote to the hospital trusts and health ombudsman to find out what had happened and they tried to fob me off for two years it was another kick in the teeth.
"It generally felt they were trying to brush it under the carpet and after getting nowhere for two years I decided legal action was my only option.
More top news
A hospital in Plymouth will become the first in the UK to offer free do-it-yourself HIV testing kits.
The owners of an iconic hotel in Devon made famous by Agatha Christie want to install 200 solar panels, but some locals are appalled.
As Hollywood hit the red carpet for the "Fury" premiere on Sunday, Brad Pitt paid tribute to his unusual co-star; a WWII tank from Dorset.