This trial aims to evaluate the use of stem cells from umbilical cord in the treatment of heart failure. The trial is being conducted at the Universidad de los Andes in Santiago and proposes to recruit 30 patients between December 2012 and January 2014. The participants will have their cardiac function carefully calibrated and recorded three months prior to the commencement of the trial, and be randomly assigned into one of two groups. The experimental group will receive a single intravenous (IV) injection of mesenchymal stem cells that have been obtained from donated cord blood. The control group will receive a placebo intravenous injection. Participants will be monitored for complications and changes in clinical condition at three monthly intervals for one year.