Surviving a cardiac arrest requires an optimised system of care, or Chain of Survival, that comes together as seamlessly as possible following a sudden collapse. No two communities or EMS / ambulance systems are the same and you need to intimately understand both using data to measure and benchmark how you are performing and then work to improve those elements of the system that you can change to improve survival. Improving survival from cardiac arrest is in our DNA at Ambulance Victoria and through our work we have seen cardiac arrest survival more double over the past decade, with Utstein survival rates of 37% across the State of Victoria and 41% in Melbourne. In this talk I will describe our journey of improvement across all elements of our cardiac arrest system of care including accountability, the use of registry data to map the journey from arrest to recovery; partnering to improve survival, the critical role of emerging technology and what the future holds as we strive to further optimise our system with a goal of improving survival by a further 50% over the coming years. For more head to: codachange.org/podcasts