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

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.