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Figure 4 The impact of aliased peak stress tissue velocity data on strain rate calculation. (A) The presence of aliased tissue Doppler data is identified by the golden coloration of the inferior wall on the color tissue Doppler image (lower left), which in turn produces a mottled appearance of the color strain rate image (upper left) and a meaningless strain rate curve (note the absence of negative systolic deflection [arrows]). (B) The tissue velocity data have been gathered with a higher aliasing velocity—note the different color map appearances and typical waveform.