心室中隔欠損症に合併した三尖弁位感染性心内膜炎

Tricuspid Valve Infective Endocarditis with Ventricular Septal Defect

右心系の感染性心内膜炎（IE）は抗生物質投与による内科的治療が奏効することが多く，手術適応に関して議論が多い．心室中隔欠損症（VSD）に肺膿瘍を合併するIEの2例を経験したので報告する．

Right-sided infective endocarditis （IE） accounts for 3～14％ of all cases of IE. Compared with left-sided IE, its antibiotic treatment is more effective. Therefore, the timing of its surgical treatment is still controversial. We report 2 cases of tricuspid valve IE and ventricular septal defect （VSD） associated with multiple lung abscesses and infarctions. After successful antibiotic treatment, they underwent vegetectomy, tricuspid valve plasty and VSD patch closure. Antibacterial treatment preceding surgical treatment is effective for tricuspid endocarditis complicated with multiple lung abscesses.