systolic anterior motion


Also found in: Acronyms.

systolic anterior motion (SAM),

abnormal motion of the anterior mitral valve into the aortic outflow tract caused by asymmetric septal hypertrophy.
See also: asymmetric septal hypertrophy.
References in periodicals archive ?
Systolic anterior motion of the posterior mitral leaflet: a previously unrecognized cause of dynamic subaortic obstruction in patients with hypertrophic cardiomyopathy.
Prevalence of systolic anterior motion of the mural (posterior) leaflet of the mitral valve in hypertrophic cardiomyopathy: an echocardiographic study.
Papillary muscle displacement causes systolic anterior motion of the mitral valve.
An integrated mechanism for systolic anterior motion of the mitral valve in hypertrophic cardiomyopathy based on echocardiographic findings.
Systolic anterior motion begins at low left ventricular outflow tract velocity in obstructive hypertrophic cardiomyopathy.
Echocardiography data indicates that systolic anterior motion (SAM) of the mitral valve is initiated by flow drag; the mitral valve is swept toward the septum by the pushing force of flow (Fig.
McCully et al suggested, in a series of 47 patients who underwent septal myectomy alone, that asymmetric hypertrophy, severe systolic anterior motion of the mitral leaflet(s) on preoperative echocardiography can identify patients who are most likely to benefit from septal myectomy (50).
8), as seen in a R-P-R (resection--plication--release) operation described by Swistel (55), the post-surgical study will show: 1) a dramatic thinning of the septum, with widening of the left ventricular outflow tract to a width similar to that in the normal subjects, 2) resolution of systolic anterior motion and the left ventricular outflow tract gradient, 3) marked reduction or abolition of mitral regurgitation, 4) decreased anterior mitral leaflet length and 5) more posterior mitral leaflet coaptation point (5, 53, 55).
Specificity of systolic anterior motion of anterior mitral leaflet for hypertrophic cardiomyopathy.
Dynamic systolic anterior motion of the mitral valve (SAM) with mitral-septal contact is the most common cause of obstruction.