Rare Mycotic Aneurysm of the Mitral Valve without Aortic Valve Involvement

Abstract

Mycotic aneurysms can be a rare, but serious complication of infectious endocarditis. We report the case of a 20-year-old woman who presented with fever and malaise from streptococcal bacteremia and found to have vegetation on the anterior leaflet of the mitral valve. On follow-up visit, the patient was noted to have a mycotic aneurysm of the anterior mitral valve without aortic involvement. Her clinical course was complicated by mitral valve chordal rupture, severe mitral regurgitation, and dyspnea from severe mitral regurgitation for which she underwent successful surgical repair of the mitral valve.

Spontaneous healing of a ruptured mycotic aneurysm of the posterior mitral leaflet: Unexpected resolution of a severe mitral regurgitation

“…MVA are usually associated with IE of the aortic valve, as a consequence of aortic regurgitant jet, proximity of vegetations to the anterior mitral leaflet or direct spread of infection 4 . MVA can also appear in the setting of primary infection of the MV; however, this is less frequent 5 . Isolated PMV leaflet aneurysm is extremely rare 6 .…”

“…4 MVA can also appear in the setting of primary infection of the MV; however, this is less frequent. 5 Isolated PMV leaflet aneurysm is extremely rare. 6 This latter situation might be produced by predisposing disorders that weaken the MV leaflet structure, such as degeneration of valvular tissue or MV prolapse, as it happened in our case.…”