Accessory mitral valve causing left ventricular outflow tract obstruction in an adult

Abstract

Accessory mitral valve (AMV) is a rare congenital abnormality that, rarely, causes left ventricular outflow tract (LVOT) obstruction in adults. We report the case of a 47-year-old man with deteriorating exertional dizziness. Evaluations revealed that the left ventricular outflow tract obstruction was caused by the accessory mitral valve. The patient underwent a successful operation for removal of the accessory mitral valve.

Accessory mitral valve tissue that caused a left ventricular outflow tract obstruction: a case report

“…AMVT is usually diagnosed in childhood because it is often associated with other congenital cardiac anomalies, and symptoms of LVOT obstruction often develop early on in life. Therefore, a case of AMVT diagnosed in adulthood is extremely rare [3][4][5]. In our case, the patient remained asymptomatic for many years and was first diagnosed with AMVT as an adult, using TTE and TEE.…”

“…Approximately 70% of cases are diagnosed in childhood (including neonatal period), often based on signs or symptoms related to obstruction [2]. Therefore, diagnosis of this cardiac anomaly in adulthood is extremely rare [3][4][5]. We present a case report on an adult patient with AMVT that caused an LVOT obstruction.…”

Echocardiographic Diagnosis of a Subaortic Membrane Attached to the Free Edge of the Right Coronary Cusp of the Aortic Valve

“…11 It is considered a congenital abnormality resulting from an endocardial cushion defect but has been reported in adults. 11,12 The presentation can be similar to that of a subaortic membrane in terms of associated congenital abnormalities and symptoms such as dyspnea, syncope, chest pain, and palpitations. The echocardiographic appearance can be variable and may resemble a mobile parachute-like leaflet, a fixed structure attached to the interventricular septum by a chordal apparatus, or a globular or cystic mass.…”