The six-hour operation, carried out by surgeons at Papworth Hospital on June 9, replaced Matthew Greens damaged heart with a total artificial heart. Mr Green, of London, had been critically ill as both sides of his heart were failing. The new device, used as a temporary stop-gap before transplant, provides blood flow of up to 9.5 litres per minute through the body. It is powered by a 13.5 pound portable driver designed to be carried in a backpack or shoulder bag, and has a life expectancy of three years. Steven Tsui, consultant cardiothoracic surgeon and director of the transplant service said: Matthews condition was deteriorating rapidly and we discussed with him the possibility of receiving this device, because without it he may not have survived the wait until a suitable donor heart could be found for him. The operation went extremely well and Matthew has made an excellent recovery. I expect him to go home very soon, being able to do a lot more than before the operation with a vastly improved quality of life, until we can find a suitable donor heart for him to have a heart transplant. At any point in time there may be as many as 30 people waiting for a heart transplant on our waiting list at Papworth, with one third waiting over a year. Mr Green, who two years ago cycled 18 miles a day, is not the first person to receive an artificial heart, but he is the first person to go home with one. He said I want to thank all the wonderful staff at Papworth Hospital who have been looking after me and who have made it possible for me to return home to my family. I am really excited about going home and just being able to do the everyday things that I havent been able to do for such a long time such as playing in the garden with my son and cooking a meal for my family. Papworth has been using mechanical devices to support patients with end-stage heart failure since the 1980s. It is the only centre in the UK currently certified to implant the particular type of artificial heart used by Mr Green.