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Multiplanar reformation of multislice spiral computed tomographic images in horizontal long axis orientation. The reconstruction window begins at 25% of the R-to-R interval, which corresponds to the late phase of isovolumic contraction. Atrial displacement of the posterior mitral valve leaflet (arrows) was most pronounced at this time point. LA, left atrium; LV, left ventricle; RA, right atrium; RV, right ventricle.
