A Swedish startup company called FlyPulse is about to launch life-saving emergency response drones.
FlyPulse have developed a quadcopter that can automatically fly and carry an automated external defibrillator (AED) to help save people with cardiac arrest. The alarm system used by an operator to send the drone to the emergency location is also developed by FlyPulse.
The single most important factor for achieving higher survival is to reduce the time between the cardiac arrest and defibrillation of the patient.
The FlyPulse LifeDrone-AED is 
designed to be dispatched to a location up to ten miles away, where a heart attack has been reported, beating traditional emergency services in pure speed and cutting the response time by several minutes.
“Every year 10000 people in Sweden experience cardiac arrest outside of hospital,” FlyPulse says on its website. “About 500 of these survive. The single most important factor for achieving higher survival is to reduce the time between the cardiac arrest and defibrillation of the patient.”
An AED is a portable electronic device that automatically diagnoses the life-threatening cardiac arrhythmias, and is able to treat them through defibrillation, the application of electrical therapy.