A hospital in east China has used reprogrammed stem cells to treat severe heart failure, with 90 per cent of patients showing significant recovery in heart function after the novel therapy. On Wednesday, Nanjing Drum Tower Hospital, affiliated with Nanjing University, released the long-term follow-up results of a phase 2 clinical study, which was published in the journal Nature Medicine. While dead heart muscle cannot regrow, this stem cell technology can help ageing or damaged hearts grow new...