Brain dead: Key facts

Brain death is the complete and irreversible cessation of all brain functions, including those necessary for maintaining life, such as breathing and heartbeat.

It is not the same as a coma, where some brain function remains.

A person diagnosed as brain dead is considered legally dead, even if artificial means (like a ventilator) are used to maintain a heartbeat and breathing.

Brain death is characterised by the permanent and complete loss of all brain activity, including the brainstem, which controls vital functions like breathing.

Unlike a coma, where some brain activity may still be present, brain death signifies the absolute cessation of all brain function.