Misunderstanding may arise by confusing the Buddhist and scientific definitions of death. Within the scientific system you spoke quite validly of the death of the brain and the death of heart. Different parts of the body can die separately. However, in the Buddhist system, the word death is not used in that way. You'd never speak of the death of a particular part of the body, but rather of the death of an entire person. When people say that a certain person died, we don't ask, "Well, which part died?"
Dalai LamaI met an American lady many years ago, much distant. Then I told her about my own difficult experiences and I showed some genuine concern. She responded, "Why are you so concerned about me?" We need more patience. At a fundamental level, we are the same human brothers and sisters. Then forget it. The human mind is very strange. Like that.
Dalai LamaNothing comes into being without a cause and when all the conditions are created, there is nothing that can prevent the consequence.
Dalai Lama