The availability of a heart for a transplant may be rising, CNN Health reports. Doctors in Australia have started using a new technique that allows them to remove hearts from patients who’s hearts have already stopped beating for 20 minutes. These patients are called donors after circulatory death (DCD). Usually, doctors only remove donor hearts from patients who are brain-dead but still have cardiovascular activity. The technique involves injecting the heart with a solution and placing it into a machine that suffuses it with oxygenated blood, while the heart is being transferred. This new procedure will reduce the waiting time for patients who require a heart transplant.