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Prevalence of systolic anterior motion of the mural (posterior) leaflet of the mitral valve in hypertrophic cardiomyopathy: an echocardiographic study. 1987

E Moro, and F J ten Cate, and J J Leonard, and J Roelandt
Thoraxcenter, Erasmus University and Academic Hospital Dijkzigt-Rotterdam, The Netherlands.

Cross-sectional echocardiography was used to identify systolic anterior motion of the mural (posterior) leaflet of the mitral valve from a group of 53 patients with hypertrophic cardiomyopathy. This type of systolic anterior motion was identified in parasternal long axis, apical four-chamber and/or long-axis cross-sections and was characterized by an elongation of the mural leaflet and an abnormal coaptation with the aortic (anterior) leaflet. At end-diastole, the aortic leaflet coapted at the basal or mid portion of the mural leaflet, leaving its distal "residual" segment in the left ventricle. Subsequently, during systole this "residual" segment approached or touched the ventricular septum. Systolic anterior motion of the mural leaflet was present in 6 (12%) of our patients with hypertrophic cardiomyopathy. Lengthening of the leaflet and an abnormal coaptation were associated with increased thickening of the posterior wall of the left ventricle and narrowing of the left ventricular outflow tract. All these elements contribute to the occurrence of systolic anterior motion and left ventricular tract obstruction.

UI MeSH Term Description Entries
D008297 Male Males
D008875 Middle Aged An adult aged 45 - 64 years. Middle Age
D008943 Mitral Valve The valve between the left atrium and left ventricle of the heart. Bicuspid Valve,Bicuspid Valves,Mitral Valves,Valve, Bicuspid,Valve, Mitral,Valves, Bicuspid,Valves, Mitral
D009200 Myocardial Contraction Contractile activity of the MYOCARDIUM. Heart Contractility,Inotropism, Cardiac,Cardiac Inotropism,Cardiac Inotropisms,Contractilities, Heart,Contractility, Heart,Contraction, Myocardial,Contractions, Myocardial,Heart Contractilities,Inotropisms, Cardiac,Myocardial Contractions
D002312 Cardiomyopathy, Hypertrophic A form of CARDIAC MUSCLE disease, characterized by left and/or right ventricular hypertrophy (HYPERTROPHY, LEFT VENTRICULAR; HYPERTROPHY, RIGHT VENTRICULAR), frequent asymmetrical involvement of the HEART SEPTUM, and normal or reduced left ventricular volume. Risk factors include HYPERTENSION; AORTIC STENOSIS; and gene MUTATION; (FAMILIAL HYPERTROPHIC CARDIOMYOPATHY). Cardiomyopathy, Hypertrophic Obstructive,Cardiomyopathies, Hypertrophic,Cardiomyopathies, Hypertrophic Obstructive,Hypertrophic Cardiomyopathies,Hypertrophic Cardiomyopathy,Hypertrophic Obstructive Cardiomyopathies,Hypertrophic Obstructive Cardiomyopathy,Obstructive Cardiomyopathies, Hypertrophic,Obstructive Cardiomyopathy, Hypertrophic
D004452 Echocardiography Ultrasonic recording of the size, motion, and composition of the heart and surrounding tissues. The standard approach is transthoracic. Echocardiography, Contrast,Echocardiography, Cross-Sectional,Echocardiography, M-Mode,Echocardiography, Transthoracic,Echocardiography, Two-Dimensional,Transthoracic Echocardiography,2-D Echocardiography,2D Echocardiography,Contrast Echocardiography,Cross-Sectional Echocardiography,Echocardiography, 2-D,Echocardiography, 2D,M-Mode Echocardiography,Two-Dimensional Echocardiography,2 D Echocardiography,Cross Sectional Echocardiography,Echocardiography, 2 D,Echocardiography, Cross Sectional,Echocardiography, M Mode,Echocardiography, Two Dimensional,M Mode Echocardiography,Two Dimensional Echocardiography
D005260 Female Females
D006439 Hemodynamics The movement and the forces involved in the movement of the blood through the CARDIOVASCULAR SYSTEM. Hemodynamic
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000293 Adolescent A person 13 to 18 years of age. Adolescence,Youth,Adolescents,Adolescents, Female,Adolescents, Male,Teenagers,Teens,Adolescent, Female,Adolescent, Male,Female Adolescent,Female Adolescents,Male Adolescent,Male Adolescents,Teen,Teenager,Youths

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