The number of people having heart transplants is set to double after experts pioneered a new technique for retrieving organs from donors. Some 200 patients a year undergo the operation on the NHS, but hundreds more remain on waiting lists and about 20 die each year because of a shortage of available hearts. Now medics at Royal Papworth Hospital in Cambridge have developed a new 'heart in a box' device that helps to keep the organs in better condition after they are retrieved from donors, which could double the number of annual transplants. The number of people having heart transplants is set ...