"Patient X has passed away" - The dead person still hears this sentence.
In fact, death is a process that takes place when the heart, lungs, and brain start to stop working. When the heart systole is disordered, the blood circulation will stop, this condition is called cardiac arrest . At that time, the heart will try to reverse the process, and if it fails, the patient will be recognized as dead.
Dr. Sam Parnia, director of the emergency and resuscitation department at New York University School of Medicine, and his team conducted follow-up of rescued patients after the "cardiac arrest" process.
There are a few cases of those who said they heard very well what happened, including when the doctor announced that they were dead. It was the medical doctors who participated in the emergency at that time that confirmed the stories.
According to Dr. Sam Parnia, technically the time of death is usually calculated from the time when the heart stops, blood flow to the brain stops.
But in the past, scientists have found evidence that the brain still has energy after death.
In 2013, researchers at the University of Michigan conducted an experiment to monitor the electroencephalogram signal of nine mice with a heart attack. The results show that there are very strong signals in their brains after clinical death.
Parnia said, maybe human experience for death is the same and they are trying to understand that experience.
This research by scientists shows that death can be very scary and life after death can exist.