Mural vegetation in left ventricular apex caused by Staphylococcus aureus
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Updated: Nov 29, 2025

Experimental Endocarditis Model of Methicillin Resistant Staphylococcus aureus MRSA in Rat
Published on: June 4, 2012
Takeshi Uzuka1, Masanori Nakamura1, Mayo Kondo1
1Department of Cardiovascular Surgery, Sapporo City General Hospital, Sapporo, Hokkaido, Japan.
Abstract:
A 77-year-old male on chronic haemodialysis was admitted for repeated episodes of stroke and a high fever. The patient's blood culture was positive for Staphylococcus aureus and echocardiogram results revealed moderate mitral valve regurgitation, small masses in the left atrial appendage and a 20-mm mobile, spherical structure attached to the apical cavity of the left ventricle. Surgery was conducted to successfully excise these masses and pathological investigation confirmed the diagnosis of infective endocarditis. The attachment of mobile, spherical vegetation to the apex of the left ventricle is a rare manifestation of infective endocarditis.
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