Surgical case reports · 2026
Emergency Double Valve Replacement for Ruptured Mitral Valve Aneurysm and Annular Abscess Caused by Gemella Morbillorum Endocarditis in a Patient with Bicuspid Aortic Valve: A Case Report.
Клинический случайСтатьяНазвание и аннотация: Перевод в очереди
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Onishi Yoshihiko, Abe Takayuki, Hirai Yuki, Kondo Taichi, Orii Kouan
Аннотация
INTRODUCTION: Mitral valve aneurysm (MVA) is a rare but potentially fatal complication of infective endocarditis (IE), often associated with aortic valve involvement. Gemella morbillorum, a commensal oral bacterium, is an uncommon cause of IE. We report a rare case of MVA rupture with an aortic annular abscess caused by G. morbillorum IE in a patient with bicuspid aortic valve (BAV), successfully managed with emergency valve replacement.
CASE PRESENTATION: A 36-year-old man presented with congestive heart failure and respiratory failure. Echocardiography revealed a ruptured MVA, severe mitral and aortic regurgitation, and an annular abscess. The patient underwent emergency mitral and aortic valve replacement. Intraoperative findings included extensive destruction of the anterior mitral leaflet and a BAV. Blood cultures grew G. morbillorum. The patient recovered uneventfully following 6 weeks of targeted antibiotic therapy.
CONCLUSIONS: Although IE caused by G. morbillorum is rare, it can lead to life-threatening complications such as MVA rupture and annular abscess. Early diagnosis and prompt surgical intervention are critical to achieving favorable outcomes.
CASE PRESENTATION: A 36-year-old man presented with congestive heart failure and respiratory failure. Echocardiography revealed a ruptured MVA, severe mitral and aortic regurgitation, and an annular abscess. The patient underwent emergency mitral and aortic valve replacement. Intraoperative findings included extensive destruction of the anterior mitral leaflet and a BAV. Blood cultures grew G. morbillorum. The patient recovered uneventfully following 6 weeks of targeted antibiotic therapy.
CONCLUSIONS: Although IE caused by G. morbillorum is rare, it can lead to life-threatening complications such as MVA rupture and annular abscess. Early diagnosis and prompt surgical intervention are critical to achieving favorable outcomes.