First Briton to be walking with a completely artificial heart, Mathew Green is one among the 900 people whose hearts are replaced with 'bridge-to-transplant' devices.
The device, which is slightly larger than the human heart and weighs less than six ounces, delivers blood to the body with the help of a pump that is carried in a rucksack along with a battery.
Doctors at Papworth Hospital in Cambridgeshire decided to fit him with the device in a Pounds 100,000 operation as Green's heart condition...