"Post mortem life support" (oxymoron of the month)

Perhaps, to satisfy a probably confused hospital staff, it would be better to spell out in detail what you are talking about. Unless such staff do indeed use that term for keeping circulation and respiration going after death, for other reasons - I don't know if they do or not, but I kinda doubt it.

You should also have in there that you wish all possible attempts to be made to keep you alive until the cryonics team arrives. That would probably give better results than chest compressions on a corpse.

FD