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Surgeons in Australia say they have performed the first heart transplant using a "dead heart," the BBC reports.

Donor hearts from adults usually come from people who are confirmed as brain dead but with a heart still beating.

A team at St Vincent's Hospital in Sydney revived and then transplanted hearts that had stopped beating for up to 20 minutes.

The first patient who received a heart said she felt a decade younger and was now a "different person."

Hearts are the only organ that is not used after the heart has stopped beating - known as donation after circulatory death.

Beating hearts are normally taken from brain-dead people, kept on ice for around four hours and then transplanted to patients.

The novel technique used in Sydney involved taking a heart that had stopped beating and reviving it in a machine known as a "heart-in-a-box."

The heart is kept warm, the heartbeat is restored and a nourishing fluid helps reduce damage to the heart muscle.

The first person to have the surgery was Michelle Gribilas, 57, who was suffering from congenital heart failure. She had the surgery more than two months ago.

"Now I'm a different person altogether," she said. "I feel like I'm 40 years old - I'm very lucky."

There have since been a further two successful operations.

Prof Peter MacDonald, head of St Vincent's heart transplant unit, said: "This breakthrough represents a major inroad to reducing the shortage of donor organs."