12 Abstracts / Resuscitation 96S (2015) 5–42 response time was 3 min 35 s. Finally, 49 patients survived to hos- pital admission (74.2%). Conclusions: These results are comparable to previous EMS studies which have shown a clear relationship between response time and outcome. This analysis highlights the importance of increasing the population of public access defibrillators, minimally trained operators and robust monitoring of the devices in situ to ensure they are ready for use in an emergency. http://dx.doi.org/10.1016/j.resuscitation.2015.09.027 AS016 Lethal fails without lethal endings – Simulation based BLS training with the use of peer to peer teaching Robert Pleskot 1,* , Barbara Niznanska 2 , Karel Stepanek 3 , Matus Niznansky 4 , Libuse Ourodova 2 1 ZDrSEM, Simulation-Based First Aid And Emergency Medicine Teaching Centre, Prague, Czech Republic 2 Department of Anesthesiology and Intensive Care, First Faculty of Medicine Charles University in Prague and General University Hospital in Prague, ZDrSEM, Simulation-Based First Aid and Emergency Medicine, Prague, Czech Republic 3 Emergency Medical Service Usti nad LabemZDrSEM, Simulation-Based First Aid and Emergency Medicine Teaching Centre, Usti nad Labem, Czech Republic 4 Department of Cardiovascular Surgery, First Faculty of Medicine Charles University in Prague and General University Hospital in PragueZDrSEM, Simulation-Based First Aid and Emergency Medicine Teaching, Prague, Czech Republic Purpose of the study: Our aim was to develop a system that would enable intensive simulation-based BLS training for a large number of medical students with use of peer teaching. One of the basic skills that all medical students should acquire is the ability to react in life threatening situations. However, the per- centage of med school graduates who are able to help effectively is low. Young doctors do not lack theory, as it is well taught at faculties, but they lack skills and practise. The most effective teaching method to learn these skills is simulation-based train- ing. However, it is very demanding regarding time, number of teachers and material and so it is often left out of med schools’ curriculum. Materials and methods: We designed a two phase program based on peer teaching. In the first phase 20 medical students (4–6th year) passed 25 h of BLS lecturer training. During the sec- ond phase they led BLS courses for 96 students split in groups of 12. Supervising doctor was present only for quality control and feedback. The courses consisted of training and a number of model situations and took place in an outdoor environment of hospital park. Results: During the final exam 95% of students were able to react appropriately in a complex simulation of cardiac arrest. In a post-course questionnaire 70% of students claimed increase of self- confidence to provide BLS in public. The quality of peer teaching was evaluated as above the faculty’s average by students and this was confirmed by supervising doctors too. Conclusion: BLS training based on simulations is accom- plishable even for a large number of students if peer teaching is involved. The use of human role-players and real environment in scenarios is easily accessible and increases the effectivity of simulations. Appropriately used simulation-based education is highly effective. Acknowledgements: This project has been raised as a coopera- tion between ZDrSEM – simulation-based first aid teaching centre and Charles University in Prague. http://dx.doi.org/10.1016/j.resuscitation.2015.09.028 CPR Quality AS017 Does feedback on CPR quality in AEDs increase survival after out-of-hospital cardiac arrest? Marco Bo Hansen 1,* , Lars Simon Rasmussen 1 , Thea Palsgaard Møller 2 , Marianne Agerskov 1 , Mads Wissenberg 3 , Freddy Knudsen Lippert 2 , Anne Møller Nielsen 1 1 Department of Anaesthesia, Centre of Head and Orthopaedics, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark 2 The Emergency Medical Services, The Capital Region of Denmark and Copenhagen, University of Copenhagen, Copenhagen, Denmark 3 Department of Cardiology, Gentofte Hospital, University of Copenhagen, Copenhagen, Denmark Introduction: Knowledge concerning the effect of feedback mechanisms in automated external defibrillators (AEDs) on clinical outcome is limited. We hypothesized that out-of-hospital cardiac arrest (OHCA) victims would have a higher proportion of return of spontaneous circulation (ROSC) on admission to hospital and 30- day survival if bystanders used an AED with audiovisual feedback or a metronome compared to an AED without feedback mechanisms. Materials and methods: In a 3-year period, we collected data on OHCAs in the Capital Region of Denmark (population 1.7 mil- lion) with an AED applied prior to ambulance arrival. AED data were obtained from the Emergency Medical Dispatch Centre and patient data retrieved from the Danish Cardiac Arrest Registry and from medical records. Feedback on depth and compression rate was verified by the electrocardiograms downloaded from the AEDs. Results: A total of 198 OHCAs had an AED applied before ambu- lance arrival; of these 62 (31%) provided audiovisual feedback (Table 1) and 140 (71%) used a metronome (Table 2). We found no difference in ROSC according to audiovisual feedback, 55% (95% CI, 43–67%) vs. 54% (95% CI, 46–63%, p = 0.96) and no difference in 30-day survival, 39% (95% CI, 28–51%) vs. 42% (95% CI, 34–50%, p = 0.67), respectively. We found no difference in ROSC according to use of a metronome, 56% (95% CI, 48–64%) vs. 50% (95% CI, 38–62%, p = 0.41) and 30-day survival was not different, 41% (95% CI, 34–50%) vs. 40% (95% CI, 28–53%, p = 0.82), respectively. More- Table 1 Out-of-hospital cardiac arrest with deployment of automated external defibrillators from October 27, 2011 to October 26, 2014.