As patients underwent CPR, a tablet computer displayed one of ten visual images
During 5 minutes of the CPR, patients also were repeatedly exposed through the headphone audio to the names of 3 fruits
I think this type of experiment could be harmful to patients.
Human brain consumes oxygen at varied rate. It consumes more oxygen under stress. Natural body reaction is to pass out, to preserve limited oxygen reserves in blood and tissue. Interfering or preventing person from loosing consciousness, will deplete oxygen supply faster, and may cause permanent brain damage sooner.
I have no evidence for this claim, just experience from yoga and diving.