subvalvular fusions of the chordal apparatus are shown to be associated with certain signs on the two-dimensional echocardiogram , such as additional echoes under mitral valve cusps in short-axis heart section ( sensitivity 67.2 % , specificity 90.7 % ) , and mitral orifice drawn towards the interventricular septum ( sensitivity 35.7 % , specificity 93.5 % ) , thickened subvalvular structures in the long-axis section of the heart 's left compartments ( sensitivity 40.7 % , specificity 82.9 % ) , and fissural or `` '' coma-like '' '' shape of the mitral orifice .
C0018787
heart
C0225870
interventricular septum