 Short-term success for CPR and AED is defined as recovery of pulse for one hour following a heart attack, with the medical literature in the mid-1990s reporting an upper limit of approximately 40%.Long-term success is defined as survival until discharge from a hospital, with reported rates ranging from 2% all the way to 30%.In 2011, the Walmart store in Kirksville, Missouri, had an opportunity to participate in a local program which placed 26 AEDs in various schools, churches, and businesses.