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

Aoka, Yoshikazu; Ishizuka, Naoko; Sakomura, Yasunari; Nagashima, Hirotaka; Kawana, Masatoshi; Kawai, Akihiko; Kasanuki, Hiroshi · Ann Thorac Surg · 2004

case_report · Level V

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Abstract

Accessory mitral valve (AMV) is a rare cause of left ventricular outflow tract (LVOT) obstruction and is extremely rare in adults. We report a case of an older adult with an AMV that caused severe LVOT obstruction. A parachute-like piece of tissue (the AMV) protruding into the LVOT during systole was first detected in a 45-year-old woman by echocardiography. Because the pressure gradient and dyspnea gradually progressed, she finally underwent a successful operation for removal when she was 48 years old.

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