Echo vs CMR LVH in HCM

Two-dimensional stop-frame echocardiogram (A) and comparative cardiac magnetic resonance (CMR, panel B) images acquired in short axis plane in end diastole at mitral valve level. In panel A, the echocardiogram shows normal thickness in all LV wall segments, including ventricular septum and contiguous portion of anterolateral free wall (*). In panel B, CMR image showing segmental area of hypertrophy confined to anterolateral LV free wall (20 mm) and small portion of contiguous anterior septum (*), which was identified only with CMR, in the same cross-sectional plane as echocardiogram shown in panel A.