Here in Italy it's really different because we have no paramedics, only volunteer rescuers (alone on the ambulances) and a few specialist crews (cars with a driver, a nurse and a medic in each). In my town (Genova) there are only 6 such crews, so you often do without them. And most rescuers have not even AED training. Anyway, in most cases you arrive on the scene long before the specialist crew and you have to assess the patient's situation with no specialist medical training. If the patient needs specialist care and the medic hasn't arrived yet (if the medic is coming in the first place), assuming that he isn't already in arrest (then you begin bls procedures) and that you can carry him/her safely enough before treatment, you usually follow a scoop and go policy. If you're lucky and the medic is on his way you usually arrange a rendez-vous on the road to the hospital. Now, to your case, in your situation and with your training I would probably have done the same. After all 6 minutes are not eternity. Once I was carrying a severe trauma patient with a nurse on board, we were 10-12 minutes away from the hospital, SpO2 was falling fast. He had his mouth tightly shut, he was unconscious and the nurse couldn't intubate him with the ambulance running (italian streets are usually in a very bad shape, so ambulances are never really steady environments). That said, the nurse ordered us to just run as hell and hoped he would make it. And he made it, though just in time.