death from first aid before hospital: 1122 cases, about 60% died before ambulance arriving the scence; average time for reaction of first aid was 2.2 minutes and for arriving the scence was 5.6 minutes;

• 院前急救死亡1122例；其中60%25救护车到达现场时病人已经死亡；平均院前急救反应时间为2.；2min；平均到达现场时间为5