Accessory mitral valve tissue

A congenital non-syndromic heart malformation characratized by an accessory mitral valve leaflet or various accessory mitral valve structures. It may be asymptomatic or present at various ages with symptoms of left ventricular outflow tract obstruction, low cardiac output due to subaortic obstruction or congestive heart failure. In some cases, it may be a source of cardioembolism. The malformation may be isolated or associated with other congenital heart malformations.

Left ventricular outflow tract obstruction

Left ventricular outflow tract (LVOT) obstruction can occur at the valvular, subvalvular, or supravalvular level. In general, there is an obstruction to forward flow which increases afterload, and if untreated, can result in hypertrophy, dilatation, and eventual failure of the left ventricle.


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(per page)
PMID (PMCID)
12542122
 FEMALE Adult
Accessory mitral valve tissue as a cause of left ventricular outflow tract obstruction and probable cause of cerebrovascular accident.
Cemri M, Ozdemir M, Cengel A.
Acta Cardiol. 2002;57(6):431-3.
Accessory mitral valve tissue as a cause of left ventricular outflow tract obstruction and probable cause of cerebrovascular accident.
11767185
 MIXED_SAMPLE Infant
Accessory mitral valve tissue causing left ventricular outflow tract obstruction: case reports and literature review.
Prifti E, Frati G, Bonacchi M, Vanini V, Chauvaud S.
J Heart Valve Dis. 2001;10(6):774-8.
Accessory mitral valve tissue causing left ventricular outflow tract obstruction: case reports and literature review.
10978978
 MALE Infant, Newborn
Critical left ventricular outflow tract obstruction due to accessory mitral valve tissue.
Calabro R, Santoro G, Pisacane C, Sarubbi B, Farina G, Pacileo G, Caianiello G.
Echocardiography. 2000;17(2):177-80.
Critical left ventricular outflow tract obstruction due to accessory mitral valve tissue.
8957404
 MALE Infant
Nonobstructing accessory mitral valve tissue and ventricular septal defect.
Izumoto H, Ishihara K, Ogawa M, Fujii Y, Oyama K, Kawazoe K.
Ann Thorac Surg. 1996;62(6):1846-8.
Most previously reported cases with accessory mitral valve tissue were associated with left ventricular outflow tract obstruction.
8768621
 FEMALE
[Left ventricular outflow tract obstruction caused by accessory mitral valve tissue].
Aguilar JA, Summerson C.
Arch Inst Cardiol Mex. 1996;66(1):44-50.
[Left ventricular outflow tract obstruction caused by accessory mitral valve tissue].
10146659
 MALE Adult
Diagnosis of accessory mitral valve tissue by transesophageal echocardiography.
Willens HJ, Levy R, Perez A.
Echocardiography. 1994;11(1):39-45.
Accessory mitral valve tissue is a rare cause of intracardiac mass and subvalvular left ventricular outflow tract obstruction.
2187884
 MALE Adult
Accessory mitral valve tissue: an increasingly recognized cause of left ventricular outflow tract obstruction.
Garrett HE Jr, Spray TL.
J Cardiovasc Surg (Torino). 1990;31(2):225-30.
Accessory mitral valve tissue: an increasingly recognized cause of left ventricular outflow tract obstruction.