So, she was just...disabled?
Should we starve and dehydrate children born with brain damage due to hypoxia?
• Oxygen Shortage. ...if asphyxia severely lowers the supply of oxygen to the infant's brain for lengthy periods, the child may develop brain damage called hypoxic-ischemic encephalopathy. A significant proportion of babies with this type of brain damage die, and others may develop cerebral palsy, which is then often accompanied by mental impairment and seizures.
This is not exact science. Terri was neither "clinically dead" nor "just...disabled." The term "severely brain damaged" would fit as well as any.