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[Right-sided infective endocarditis with a large size vegetation].

A 2-year-old boy with ventricular septal defect(VSD) had suffered from right-sided infective endocarditis with a vegetation 1.0 cm in size, involving pulmonary valve. Resection of the vegetation and partial resection of the pulmonary valve and patch closure of the VSD was performed after 3 weeks intravenous antibiotic therapy. In right-sided infective endocarditis, it is still unclear, however, which factors may be useful in predicting outcome or determining the need of surgical intervention. We recognize that following factors are the risk for need of surgical intervention. 1. persistent infection, 2. sever right-sided heart failure, 3. multiple embolic episodes, 4. infected by Staphylococcus aureus, 5. infection involving the annulus of the valve, 6. infection of prosthetic valve, 7. vegetation which is floppy and greater than 1.0 cm in size.