[Degenerated Monocusp Valve Complicated with Infective Endocarditis after Total Correction of Tetralogy of Fallot;Report of a Case].

: There have been few reports about degenerated monocusp-valve patches, which were used for right ventricular outflow tract( RVOT) reconstruction with complications of infective endocarditis after total correction of tetralogy of Fallot( TOF).A 44-year-old male patient, who had a total correction of TOF using Monocusp Valved Outflow Patch (MVOP) 34 years previous, was admitted for heart failure with aortic regurgitation. An echocardiographic study showed an infective endocarditis with vegetations, attached to the aortic valve and the monocusp-valve outflow patch. The aortic valve was replaced with a mechanical prosthesis and the pulmonary valve was replaced with a biological prosthesis. RVOT was reconstructed using a bovine pericardial patch. The explanted monocusp-valve was deteriorated and heavily calcified. The postoperative course was uneventful. The patient was discharged and returned to his preoperative lifestyle 36 days after the redo surgery.