[Infectious endocarditis complicated with preoperative infectious intracranial aneurysm;report of a case].

: A 44-year-old man was admitted with the diagnosis of active infective endocarditis( IE) due to Streptococcus mitis, complicated with infectious intracranial aneurysm. Preoperative echocardiography showed mobile vegetation on the mitral leaflet, size of which was 20 mm. The magnetic resonance imaging( MRI) demonstrated that the size of aneurysm was increasing, and infectious intracranial aneurysm was treated surgically. Twenty one days after the operation, the mitral valve plasty was performed. He was discharged on foot without any neurological findings. The duration between the brain surgery and the cardiac surgery was thought to be important to prevent the new neurological complication.