How drones delivering defibrillators could save lives in Britain

Earlier this year, a 71-year-old man in the Swedish city of Trollhattan was shovelling snow outside his house when he suffered a cardiac arrest -- his heart suddenly stopped beating. A passing doctor rushed to help and began performing cardiopulmonary resuscitation (CPR) to keep blood and oxygen flowing to his brain and other vital organs, while a bystander called for an ambulance. It was a race against time. With no pulse, the man's heart needed to be shocked back into life using a defibrillator. The drone took just three minutes to arrive, reaching the patient well ahead of paramedics.