A Struggle to define "death" for organ donors

Scientist and Researchers have a controversy over figuring out a definition for death for possible organ donation. Scientist has defined death as brain dead meaning no brain activity whatsoever. But now their is a new addition discovery of definition to death which is cardiac and circulatory death. When the heart or circulatory system is not working and family of doctors assume that their is no help, they arguing the issue that it is ok to put them on the organ donors list but they do not know for sure if they are completely dead or If their  is a chance for revival but still  put them on a list for a possible donor.  -What do you think or consider as a definition of dead? - Do you think it is right to put someone on the organ donors list as a possible donor without an actual diagnostic tes http://m.npr.org/story/149463045?url=/blogs/health/2012/03/27/149463045/a-struggle-to-define-death-for-organ-donors