The heart can be restarted after a person has officially died. However, the resulting brain damage often means people struggle to return to their former motor function and mental capacity. Hyperbaric oxygen therapy can help. This treatment involves administering pure oxygen to a patient lying in a pressurized chamber. Doctors have successfully reversed the brain damage of a two-year-old drowning victim, using this technique. The toddler, who could no longer speak, walk or respond to voices, fully recovered after 40 45-minute sessions given twice a day.



