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Figure 2 Schematic representation of morphological features of classical apical HCM with spadelike configuration (left) and apically predominant HCM with nonspade configuration (right). Top shows long-axis images corresponding to LVG in right anterior oblique projection. Bottom shows short-axis images obtained at basal level and at apical level. Dotted lines on long-axis images represent levels for setting basal and apical imaging planes for short-axis images. Dotted line on each short-axis image indicates imaging plane for long-axis image which corresponds to LVG in right anterior oblique projection. Localization of hypertrophied myocardium at apical level is circumferential in spadelike configuration and it is confined to a small region, for example, to the lateral wall at apical level in nonspade configuration. Note that hypertrophied myocardium confined to lateral wall is not delineated on long-axis image. T(A,a) = anterior wall thickness at apical level; T(A,m) = maximal wall thickness at apical level; T(A,p) = posterior wall thickness at apical level; T(B,a) = anterior wall thickness at basal level; T(B,m) = maximal wall thickness at basal level; T(B,p) = posterior wall thickness at basal level.
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