The PulsePoint Study

"The PulsePoint interface software monitors each 9-1-1 call on dispatch computers and is automatically triggered by particular conditions including call type (e.g. suspected cardiac arrest) and location type (public location). When triggered, the system pushes location data to all PulsePoint mobile application users within 400 meters of the emergency location.~When a mobile device running the PulsePoint Respond application receives the alert data from the PulsePoint system, the device alarms with auditory, tactile (vibration) and visual stimuli. The application presents a map showing the exact location of the suspected cardiac arrest and the closest public access defibrillator."