Ditzyboy, given that it wasn't a medical emergency, surely the distress in this case shouldn't have been so intense?
Their call of course, and definately not a good idea to fly when you're shaken.
Husband is the next-of-kin, so its his call if the patient hasn't or is unable to communicate their wishes. Poor bastard. I imagine any arguing on an aircraft would become security issue more than a medical or legal one.
Noone is obligated to resuscitate anyone unless they're an on-duty medical professional.