The field of medicine requires rational scientific analysis and demonstration. After extensive research by many medical experts, a consensus has been reached in the medical community. Patients who cannot regain autonomous breathing and heartbeat after removing life support machines were originally found to have irreversible damage to the brainstem, the most crucial part of the human brain, thus called brain death.
Medical experts further discovered that ischemia and hypoxia can lead to brain death. If resuscitation is timely, there is a possibility for the brain to restore function by being reperfused with nutrition from the blood within a specific timeframe, thereby avoiding brain death.
