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
At least five people have suffered minor injuries but the cause of the blast is still unknown.
A songwriter from Harlesden who wrote a track for Beyonce's Lemonade album has been nominated for a Grammy Award.
Sadiq Khan issues the first 'very high' air quality alert since becoming Mayor