The news was presented at the AAAS meeting in Phoenix, Arizona. Anna Fowler presented a synthesis of dozens of studies on near-death experiences and neuroelectrical activity around cardiac arrest. - https://particle.news/story/aaas-presentation-argues-consciousness-may-persist-minutes-to-hours-after-clinical-death
There are multiple ways to be “unconscious.” Head trauma, sleep, general anesthesia, fainting, coma - for example.
The experience varies wildly: from absolute nothing under general anesthesia to extremely vivid stuff during sleep.
Ok, that depends on definition I guess.