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Scientists have revived activity in the brains of pigs up to nearly an hour after circulation had ceased. In some cases, functionality was sustained for hours through a surprising discovery by researchers in China.
Sudden cardiac arrest causes a lot of problems in the body due to the rapid cessation of blood flow. The subsequent drop in circulation to parts of the body is called, and when it occurs in the brain, it can cause serious, irreparable damage within minutes. This is why the resuscitation window for cardiac arrest is so short.
The next stage of the research involved attempting to incorporate an undamaged liver into the life support system reviving a brain that had been removed from a euthanized pig entirely. This is unlikely to be a scenario used to treat humans, but it helps scientists understand the windows in which resuscitation may be viable.
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