Abstract 2535: Early Defibrillation by First Responders Trained to Only Defibrillate Doubles Survival From Ventricular Fibrillation
Hypothesis. We assessed the hypothesis that in a two-tiered system of early defibrillation first responders trained to only defibrillate may increase survival in patients found in ventricular fibrillation (VF).
Methods. A retrospective design was utilized to study all cardiac arrest patients that had out-of-hospital cardiac arrest over a 9-year period. The study took place in a two-tiered EMS system serving an urban population of 251,224 persons. The first tier response is provided by medic or paramedic staff. The second tier response is provided by lay personnel (PV-AED) trained to only defibrillate and with no training in CPR. With “blue code” EMS activate the ambulance together with the PV-AED. Survival rate was recorded dividing patients (pts) firstly treated by PV-AED or by EMS. Number of “blue code” was recorded and related to survival rate.
Results. 1956 cardiac arrest were recorded. VF was present in 294/1956 pts (15,03 %). 78/294 pts survived (26,53%). Survival rate was higher in group treated by PV-AED than in group treated by EMS (Tab.1⇓). Total survival rate in the integrated system remains low: 78/1956 = 3,9%. Survival rate was strictly related to “Blu code” activation as demonstrate in figure 1.
Conclusions. Lay responders trained to only defibrillate saved up to 36,6% of VF cardiac arrest pts, more than twice compared to EMS because of their earlier arrival. The results are better when the blue code is activated.