This is the scenario: upon arrival (als & bls pulled up together) find 80y/o male in cardiac arrest. no shock-able rhythm, after 20-30 min of CPR+ meds we get a pulse back, en route we lose it, get it and lose at hospital a couple of times(don't remember how many) My question is that the last time we lost it, we did CPR for about 5 min before the doc called it. Do you think he called it to early?