Surgeons transplant heart that had stopped beating
J Thoendell stashed this in Science
"This breakthrough represents a major inroad to reducing the shortage of donor organs."
It is thought the heart-in-a-box, which is being tested at sites around the world, could save up to 30% more lives by increasing the number of available organs.
The breakthrough has been welcomed around the world.
The British Heart Foundation described it as a "significant development".
Maureen Talbot, a senior cardiac nurse at the charity, told the BBC: "It is wonderful to see these people recovering so well from heart transplantation when, without this development, they may still be waiting for a donor heart."