 The MyoCellTM implantation using the MyoCathTM delivery catheter system may have the potential to add a new dimension to the management of post-infarct deterioration of cardiac function in subjects with congestive heart failure. Based on pre-clinical studies, implantation of autologous skeletal myoblasts may lead to replacement of non-functioning myocardial scar with functioning muscle and improvement in myocardial performance. Preliminary data in human subjects suggest skeletal myoblast implantation at the time of CABG may lead to the same effects. In principal, myoblast implantation by catheter delivery may offer the same therapeutic benefit. The present clinical study is to be conducted primarily to evaluate the safety of MyoCellTM implantation using the MyoCathTM delivery system and secondarily to evaluate the effect on regional myocardial function post treatment. 