In a recent Phase I clinical study, a collaboration of the Cedars-Sinai Heart Institute, the EMMES Corporation and Johns Hopkins University, researchers sought to regenerate heart tissue that is functionally compromised and typically scarred as a result of a heart attack. More specifically, the treatment involves the extraction of the stem cells from the patients, the in vitro [in the lab] expansion of the stem cells and the transplantation of the stem cells back into the patient. The success of this early stage study should lead the way to larger larger studies.