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Systolic Anterior Motion of the Mitral Valve in the Absence Left Ventricular Hypertrophy: Role of Mitral Leaflet Elongation and Papillary Muscle Displacement
Author(s) -
Izgi Cemil,
Akgun Taylan,
Men Ebubekir Emre,
Feray Hasan
Publication year - 2010
Publication title -
echocardiography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 62
eISSN - 1540-8175
pISSN - 0742-2822
DOI - 10.1111/j.1540-8175.2009.01108.x
Subject(s) - papillary muscle , cardiology , medicine , mitral valve , displacement (psychology) , left ventricular hypertrophy , elongation , muscle hypertrophy , anatomy , materials science , metallurgy , blood pressure , psychology , psychotherapist , ultimate tensile strength
We report a 15‐year‐old patient who presented with exercise dyspnea and limitation of physical activity. Echocardiography revealed significant left ventricular outflow tract obstruction caused by systolic anterior motion (SAM) of the mitral valve. The wall thickness of the left ventricle was within normal limits. Elongation of the mitral leaflets and anterior displacement of the posteromedial papillary muscle were apparent in the echocardiographic examination. These two factors have been previously demonstrated to play a central role in the occurrence of SAM in patients with hypertrophic cardiomyopathy. The present case validates that such intrinsic abnormalities of the mitral valve can cause significant SAM even in the absence of left ventricular hypertrophy. (Echocardiography 2010;27:E36‐E38)