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Britain's first heart transplant patient Frederick West pictured with nurses after recovering from a heart transplant operation carried out at the National Heart Hospital in London by a team of doctors led by South African surgeon Donald Ross in May 1968. Frederick West would go on to live for a further 46 days after receiving the donor heart. (Photo by Rolls Press/Popperfoto via Getty Images/Getty Images)

Britain's first heart transplant patient Frederick West pictured with nurses after recovering from a heart transplant operation carried out at the National Heart Hospital in London by a team of doctors led by South African surgeon Donald Ross in May 1968. Frederick West would go on to live for a further 46 days after receiving the donor heart. (Photo by Rolls Press/Popperfoto via Getty Images/Getty Images)