 In the cell infusion groups after successful PCI, PBSCs were mobilized by daily subcutaneous injections of G-CSF Dong-A pharmaceutical, Seoul, Korea at 10 gkg body weight for three days. At day 4, mobilized PBSCs were collected with COBE spectra apheresis system COBE BCT. Inc., Lakewood, CO, USA using the mononuclear cell collection methods and infused selectively to infarcted myocardium via over-the-wire balloon catheter. 