Medics in the US made history last week when they transplanted a pig heart into a human patient with terminal heart disease. The pig was genetically engineered so its organs could survive in a human body. Health officials in the UK have kept track of the landmark surgery which could one day allow more patients to benefit from transplant. The surgery at the University of Maryland Medical Centre in Baltimore last Friday took seven hours. Four days on, patient David Bennett is said to be doing well and is breathing on his own without a ventilator. Soundbites in order: Muhammad M Mohiuddin MD, Professor of Surgery at Maryland School of Medicine. Christine Lau MD, Professor and Chair, Department of Surgery, University of Maryland School of Medicine. Bartley P Griffith MD, Professor of Surgery, University of Maryland School of Medicine.