Prominent or not as a doctor you never give up on any patient!! You took an oath! If there is a slim chance of survival on any patient you do yor best to make sure they survive and get to see their families again.
I know that what I am about to say, will probably result in my post being removed, but what you said about the 'prominent' patient is just a horrible thing to say. An inquest on the death of any person can result in litigation if the judge decides that the doctor did not do the best in their power to save the patient. Just because Johan Friso is a prince does not mean that he should get a different treatment than any other person in the same condition.
Well, 50 minutes is a very, very long time trying to reanimate a patient. And what do you mean by give up on a patient? When the rescue team or doctor stops as they do in a normal case, they don't "give up on" the patient, they just believe there is no more hope. But of course you can try even without much hope, even if you know that chances are slim. In some cases it works -but only rarely this means a miracle. Instead you often revive a body, but not the brain....