Doctors will randomly treathalf the patients with a harmless virus carrying a corrective gene. The restwill receive an inactive placebo treatment.
Previous research suggests that a protein produced by the gene can restore function to failing hearts, and reduce the risk of death and heart transplants.
More top news
Mayor of Newham Sir Robin Wales criticised the International Olympic Committee on the fourth anniversary of the opening ceremony.
If you're missing the euphoria of London 2012 here's your chance to own a real piece of Olympic history.
Her owners were convinced she was gone for good and were shocked when a Parisian cat rescue centre got in touch.