People think medication and life support helps someone brain-dead stay alive when in fact Doctors know the person is medically dead already despite their hearts beating and and they are breathing with the aid of equipment. People are more familiar with and accepting the faster deaths such as the heart failure completely. In this latter case, the brain being medically sound is not helpful because the heart stopped, death is fast. So death is declared immediate. Brain-dead is Doctor-speak for saying "hopeless and will die soon" saxib. There is no life extension by being placed on life support system. It is waiting for the inevitable. They should let people die in peace and without hooking them up to some useless gadgets that give the appearance of help when the clock is really ticking towards the end anyway.
@Schematics
The point is clear, there isn't some obscure thing called the "soul", it is either the brain or the heart. Thanks for coming to that conclusion.