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Cardiologist Michael Sabom described a near-death experience that occurred while its experiencer – a woman who was having an unusual surgical procedure for the safe excision and repair of a large basilar artery aneurysm – met all of the accepted criteria for brain death. The unusual medical procedure involved the induction of hypothermic cardiac arrest, in order to insure that the aneurysm at the base of the brain would not rupture during the operation. The patient’s body temperature was lowered to 60 degrees Fahrenheit, her heartbeat and breathing ceased, her brain waves flattened, and the blood was completely drained from her head. Her electroencephalogram was totally flat (indicating no cerebral electrical activity) and auditory evoked potentials (normally elicited by clicks presented through molded earplugs that had been inserted into her ears) ceased (indicating cessation of brainstem functioning). Ordinarily – at regular body temperature – the brain cannot function without its oxygen supply for more than a few minutes. Lowering the body and brain temperature to 60 degrees F. – by chilling the blood in a bypass machine before returning it to the body and brain – however, can reduce cellular metabolism so that the brain can tolerate complete cerebral blood flow for the 45 minutes or so required for the brain operation. The patient later reported that, apparently while under these “brain death” conditions, she had a near-death experience (NDE) in which she was able to observe and hear details of objects and happenings in the operating room with accuracy. She also experienced classic components of the NDE, including a tunnel vortex, a bright light, and different figures in the light (many deceased family members, including a distant cousin of whose death she had been unaware).