We have experienced one case of Redo AVR which was performed 13 months after initial operation. The patient had received AVR [Bjork-Shiley disc valve] and MVR [Ionescu-Shiley tissue valve] because of ASI and MSI at March, 1981. During follow up through the OPD, he complained exertional dyspnea and progressive jaundice with hemolytic anemia was also noticed since 1 month prior to readmission. Cardiac catheterization and angiography revealed periaortic valvular leakage due to partial detachment of previously replaced prosthetic aortic valve. Re-replacement of prosthetic aortic valve with Ionescu-Shiley valve was performed and the patient was discharged at 17th POD without any complications. [KTCS 1982;2:254-258]