It is clinical death which is known as cessation of blood circulation and breathing when heart stops pumping blood , without CPR biological death begin to set in about 4-6 minutes later.
This biological death is the victim brain is damaged and cells in victims heart, brain and other organs die from a lack of oxygen that damage caused by biological death which is irreversible.
According to UDDA -there are an individual who has sustained either irreversible cessation of circulatory and respiratory function and irreversibly cessation of all function of entire brain stem which includes the working of brain is dead.
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