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Figure 2 Echocardiogram in a patient with straddling mitral valve (MV) and {S,D,L} segmental anatomy. (A) Subxiphoid long-axis view showing dextrocardia, left-sided left atrium (LA) with an MV that enters an inferior left ventricle (LV). The right ventricle inflow (RVi) is superior to the LV and the ventricular septum is horizontal (superior-inferior ventricles). Notice that the tricuspid valve (TV) is seen in a "short-axis" orientation whereas the MV is seen in a "long-axis" orientation. This indicates that the axes of the MV and TV are angled relative to each other, typical for criss-cross atrioventricular relations. (B) Clockwise rotation of the transducer from the long-axis plane demonstrates major straddling of the MV into a large left-sided infundibulum (Inf). L/A = left/anterior; R = right; S = superior.
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