Stem cells can repair a damaged heart and potentially halve the number of people dying from heart failure, scientists have shown, in a major breakthrough for regenerative medicine...

Now, in the largest trial ever conducted, doctors in the US have proven that even the most serious cases of heart failure can be repaired using stem cells harvested from a patient's own bone marrow.

End-stage patients, whose only hope was a heart transplant, were treated with stem cells in a single operation. Doctors found the group were 37 per cent less likely to have been admitted to hospital in the 12 months following the operation and half as likely to have died than those on placebo.