Abstract
Abnormal movement of the mitral valve observed in patients with hypertrophic obstructive cardiomyopathy (HOCM) consists of variable degrees of systolic anterior motion (SAM) towards the interventricular septum and has been recognized by angiography and echocardiography. Several explanations of its mechanism have been suggested: abnormal insertion of the anterior mitral leaflet (1), malposition of the papillary muscles (2), posterior displacement of the mitral annulus by septal hypertrophy (3) and venturi effect due to the high speed of ejection in the left ventricular outflow tract (4). A close correlation between SAM and the intraventricular pressure gradient has been demonstrated and SAM is also thought to play a part in the mechanism of mitral incompetence, the incidence of which increases with the severity of the disease (5).
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References
Bjork VO, G. Hultquist, H Lodin: Subaortic stenosis produced by an abnormally placed anterior mitral leaflet. J Thorac Cardiovasc Surg 41:659, 1961.
King JF, RL Reis, MR Bolton: Superior to inferior septal hypertrophy in IHSS. The fundamental determinant of obstruction. Circulation 47 (sup-IV): 6, 1973.
Calazel P, J Tricoire, JP Douzeau, P Bernadet: Etude angiographique des myocardiopathies obstructives. Essai d’evaluation du rôle du septum interventriculaire et de la grande valve mitrale dans le phenomene obstructif. Arch Mal Coeur 69:229, 1976.
Henry WL, CE Clark, SE Epstein: Mechanism of outflow obstruction in IHSS. Circulation 47 (sup-IV): 177, 1973.
Wigle ED, AG Adelman, P Auger, Y Marquis: Mitral regurgitation in muscular subaortic stenosis. Amer J Cardiol 24:698, 1969.
Henry WL, CE Clark, SE Epstein: Asymmetric septal hypertrophy. Circulation 47:225, 1973.
Rodgers JC: Motion of mitral apparatus in hypertrophic cardiomyopathy with obstruction. Brit Heart J 38:792, 1976.
Burford TH, AF Hartmann, TB Ferguson, RW Ferrier: The production of muscular subaortic stenosis in dogs. J Thorac Cardiovasc Surg 54:639, 1967.
Grossman W, LP McLaurin, JP Moss, HA Stefadouros, DT Young: Wall thickness and diastolic properties of the left ventricle. Circulation 49:129, 1974.
Maron BJ: Distribution of myocardial cellular defects in ASH. Differences between patients with and patients without outflow obstruction. Ann Int Med 81:669, 1974.
Witchitz S, JP Binet, B Philippe, A Senekies, P Chiche: Traitement d’une CMO par myotomie chez un sujet de 67 ans. Arch Mal Coeur 69:783, 1976.
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© 1979 Martinus Nijhoff Publishers by, The Hague
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Drobinski, G., EugÈne, M., Evans, J.I., Grosgogeat, Y. (1979). Abnormal Mitral Valve Motion, Septal Hypertrophy and Left Ventricular Outflow Tract Obstruction: Echocardiographic and Haemodynamic Study in Hypertrophic Obstructive Cardiomyopathy. In: Lancée, C.T. (eds) Echocardiology. Developments in Cardiovascular Medicine, vol 1. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-9324-2_20
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DOI: https://doi.org/10.1007/978-94-009-9324-2_20
Publisher Name: Springer, Dordrecht
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