A case of membranous septal aneurysm associated with infective endocarditis

A 43-year-old man with membranous septal aneurysm associated with infective endocarditis was reported. In this case, the stream of the shunt through VSD was directly oriented toward the atrial surface of the tricuspid anterior cusp and made it unusual form. The focus of infective endocarditis was located on that cusp, and he underwent tricuspid valve replacement with VSD closure. The post-operative course was uneventful. We discussed the tricuspid anterior cusp deformed by the jet stream of the shunt and the relationship between the aneurysm and the infective endocarditis.