The injectable patch can help patients recovering from heart surgery. Heart surgery often leaves patients with severely reduced heart function and damaged tissue. Normally, patches require another invasive open heart surgery in order to be installed – and most heart patients are too frail for further surgery. The new patch can be injected with no surgery at all, making it easier on patients. Researchers used nano-chips to develop the patch. They reprogrammed skin cells to form a tiny patch of heart cells. The cells actually beat in a regular rhythm. After injection, the patch unfolds onto the heart and begins to regenerate the damaged heart tissue. The patch has been successfully tested on rats and researchers have high hopes for its use on humans.