Therefore, the effectiveness and safety of PCI at Cho Ray Hospital should be assessed Objective: To evaluate success rate, complication rate and MACE of PCI at Cho Ray Hospital. Method and results: From January 2007 to May 2008, 774 patients, of whom 50.7% had acute coronary syndrome, underwent PCI at the Cath Lab of Cho Ray hospital with 920 interventional procedures on 1169 lesions with 1106 stent.