"The saddle-shaped annulus of the mitral valve defines the insertion of the valve leaflets and defines the boundary between the the left atrium and left ventricle; in doing so it provides mechanical coupling of the atrium/valve apparatus and basal ventricular myocardium. Optimal annular structure and dynamic function, such as the early systolic contraction of annular dimensions and cyclical geometrical variation, is an important component of valvular competency. Left ventricular contraction and deformation is thought to drive the movement and structural rearrangement of the annulus (which lacks contractile fibres) during systole by "pulling" mechanically coupled adjacent segments 9."
"hyper-mobility, with a high velocity outward "curling" of the annulus during mid systole and resultant deformation of the corresponding papillary muscle via the chordae tendinae 11"
Expected headings
"Associations"
"Echocardiography"
"The saddle-shaped annulus of the mitral valve defines the insertion of the valve leaflets and defines the boundary between the the left atrium and left ventricle; in doing so it provides mechanical coupling of the atrium/valve apparatus and basal ventricular myocardium. Optimal annular structure and dynamic function, such as the early systolic contraction of annular dimensions and cyclical geometrical variation, is an important component of valvular competency. Left ventricular contraction and deformation is thought to drive the movement and structural rearrangement of the annulus (which lacks contractile fibres) during systole by "pulling" mechanically coupled adjacent segments 9."
"tethering of the mitral annulus to left atrial wall motion with paradoxical systolic flattening, expansion and alteration in shape"