Dispatch of lay-responders is associated with bystander cardiopulmonary resuscitation, bystander defibrillation and 30-day survival following an out-of-hospital cardiac arrest

Abstract Background Dispatch of lay-responders in out-of-hospital cardiac arrest (OHCA) is increasingly common and the recent European Resuscitation Council (ERC) guidelines has a strong recommendation using these systems. Some previous studies with various study designs have shown associations increased survival rates. We aim to investigate if dispatch increases bystander cardiopulmonary resuscitation (CPR) rates, AED usage, 30-day following an OHCA. Methods included all OHCA two most populous regions Sweden. OHCAs occurring during hours where lay-responder system was not active were excluded as well cases witnessed by EMS. Risk ratios (RR) calculated modified Poisson regression adjusted for age, sex, location, status, EMS response time hour day. Continuous variables used restricted cubic splines. Results 5217 between January 2016 December 2019. In 2327 activated 2890 activated. The proportion receiving CPR 71.4% compared 59.9% when not. corresponding number attachment 10.4% vs. 7.2% defibrillation 4.1%. patients alive after 30 days 10.6% 8.3% it RR 1.37 (1.31–1.43). For 1.48 (1.21–1.82) 1.92 (1.34–2.75). 1.29 (1.04 – 1.60). Conclusion associated CPR, attachment, defibrillation, survival. These results supports ERC that recommends introduction similar Funding Acknowledgement Type funding sources: Public grant(s) EU funding. Main source(s): Horizon 2020