Something similar happened recently in Norway. A tourist was found severely cold in the mountains, in a storm where extracting him took hours. After a while hypothermia got to him, his heart stopped, and only 8 hours later they got it starting again, was technically dead for 20 hours. In this case, it looks to have gone well with the person afterwards.
They say you're not dead until you're warm and dead.
They say you're not dead until you're warm and dead.
News article https://www-nrk-no.translate.goog/vestland/nye-tal_-turgaare...
Recount of the story https://www-nrk-no.translate.goog/vestland/xl/turgaaren-var-...