Danvers Massachusetts based ABIOMED, INC. has invented a device to aid failing hearts. The original goal of the ABIOMED was to develope a artificial mechanical heart to replace fail hearts. But someone used the device as a temporary heart while the patient was waiting for a donor heart to have transplanted, with miraculous results.
While the temporary heart pump was used, the failing heart was put to sleep, and stopped beating. When the doctors re-examined the heart a few weeks later, they found that the heart had regenerate dramatically to the point that a transplant was no longer needed. The failing heart had healed itself while ABIOMEDs heart pump was used. This is like Star Trek technology, and could eliminate the need for heart heart transplants in the future.