Mechanical heart patient on 'revolutionary' treatment
2 August 2011 Last updated at 13:13 BST
A 40-year-old man has become the first British patient to receive a completely artificial heart.
Matthew Green will be able to to lead a more normal life while he waits for a live transplant.
Whole artificial hearts have been implanted in several hundred people in the United States, but the operation has only just been licensed in the UK.
David Shukman reports.