[Infective endocarditis of the mitral valve complicated with preoperative rupture of the mycotic iliocolic artery aneurysm].

A 55-year-old man was diagnosed with infective endocarditis( IE) of the mitral valve caused by Streptococcus sanguinis. His IE was controlled immediately after the initiation of intravenous antibiotic therapy lasting for 4 weeks. A few days before surgery, he complained of abdominal discomfort and computed tomography (CT) scan revealed rupture of the mycotic iliocolic artery aneurysm. Emergency transcatheter arterial embolization( TAE) was successfully conducted. After additional 4 weeks' intravenous antibiotic therapy, the mitral valve was replaced. Mycotic visceral artery aneurysms are rare in IE. Early diagnostic approaches and interventions such as TAE are crucial.