Abstract
Bacterial endocarditis is a complex disease that is associated with significant morbidity and mortality. Staphylococcus aureus is an organism commonly responsible for acute bacterial infective endocarditis. Patients many times develop an acute fulminant infection resulting in multiple complications, even in the face of adequate therapy. We report an unusual case of S. aureus acute bacterial infective endocarditis in an immunocompromised patient resulting in multiple cardiac complications, including bacterial pericarditis with effusion, mycotic aneurysm of one of the coronary arteries, a valvular vegetation leading to an aneurysmal dilatation at the mitral-aortic junction (intervalvular fibrosa), and a fistulous communication between the left ventricle and left atrium. We present detailed echocardiographic images of these anomalies, which were subsequently confirmed intraoperatively. The patient underwent open heart surgery with pericardial patch repair of the mitral-aortic intervalvular fibrosa aneurysm and fistula.
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