O154 Minimisation of the Effects from Ablation Catheter Sliding Movements during Radiofrequency (RF) Ablations by Electrogram Gated RF Delivery

Abstract

R A L A B ST R A C T S those first defibrillated by emergency medical services (EMS), which includes AV paramedics, firefighters and community emergency response teams. Methods: OHCA adult cases (>15 years) which occurred in a public location and were attended by AV during the period 1 July 2002 to 30 June 2013 were extracted from the Victorian Ambulance Cardiac Arrest Registry (VACAR). These cases were either in a shockable rhythm (VF/VT) on EMS arrival and received defibrillation by EMS or were defibrillated by bystanders with an AED prior to EMS arrival (at an AV PAD site or other site). No arrests were witnessed by EMS and all cases had attempted resuscitation by EMS. Results: During the study period, there were 2116 adults first defibrillated by EMS and 127 adults first defibrillated by a bystander with an AED. Median time to defibrillation was significantly shorter for individuals first defibrillated by bystanders at sites with AEDs (5.5 mins, IQR 4.0-9.0 mins) compared to patients first defibrillated by EMS (10.0 mins, IQR 8.0-13.0 mins), p<0.001. Significantly more individuals who were first defibrillated by a bystander at sites with AEDs survived to hospital (63%) compared to those first defibrillated by EMS (51%), p1⁄40.006. Significantly more individuals who were first defibrillated by a bystander at sites with AEDs survived to hospital discharge (41%) compared to those first defibrillated by EMS (31%), p1⁄40.020. After adjusting for other factors known to influence survival, defibrillation by a bystander with an AED increased the chance of survival to hospital discharge by 51% compared to individuals first defibrillated by EMS (odds ratio 1.51, 95% CI: 1.01-2.25, p1⁄40.045). Conclusion: Survival to hospital discharge favoured individuals first defibrillated by bystanders with a public AED. These findings support continued resource allocation towards PAD programs. Disclosure of Interest: None Declared