The Genome News Network reports on the state of a stem cell therapy for heart disease. Scientists are as yet unsure how this transfusion-like therapy works, but human trials over the past two years have demonstrated that it does work. The most recent work had to be performed outside the US because the FDA - in its normal obstructionist way - was blocking human trials up until very recently. As the scientist leading the latest trial says: "We have a lot of patients that are marching on towards end-stage heart failure. Are we going to wait around, sitting on our hands while we try to figure out what is happening in mice? Or do we move forward and try to see if this treatment can help?"