Numerous clinical trials have been conducted to compare therapeutic efficacy of thrombolysis and that of primary percutaneous coronary intervention (PCI) in the patients with acute coronary syndrome (ACS). Several recent meta-analyses revealed that primary PCI provides better short-term and long-term clinical results for ACS patients than thrombolysis does. However, in order to obtain such benefit of primary-PCI, PCI procedure has to be done by the team of well-trained angioplasters and para-medical staffs with on-site surgical back-up, as indicated by the JCS guideline for ACS treatment.