Complex sentence: Peter Houghton is the longest surviving artificial heart transplant patient (UK) who was implanted with a Jarvik 2000 heart pump at the John Radcliffe Hospital, Oxford, Oxfordshire, UK, on 20 June 2000 due to severe heart failure.
Split into simpler sentences: Peter Houghton is the longest surviving artificial heart transplant patient in the UK. Houghton was implanted with a Jarvik 2000 heart pump at the John Radcliffe Hospital, Oxford, Oxfordshire, UK, on 20 June 2000 due to severe heart failure.