Zahavasdad, that is a point I have been making for a while. People who undergo bypass surgery where heartbeat and respiration have been stopped or people who go into cardiac arrest and have to be resuscitated are halachicly dead during that period and all halachos pertaining thereto apply. Is wife becomes an almonah and is free to marry. His sons become his heirs and he no longer owns any property.
I one is scheduled for heart surgery one should take halachic action to secure his property and must re-marry his wife upon his recovery.
P.S. If you want to say that such folks aren’t really dead, please explain why not. It appears to me that we can be mechayei meisim under these certain limited circumstances. that is one of the conditions of b’tzelem Elokim. Of course, HKBH has unlimited ability to be mechayei meisim.