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Figure 3 Graphs depicting the relationship between the geometrical change (expansion) and functional change (contractile function) for each of 30 intertransducer segments in the left ventricular myocardium. Red symbols represent segments located within the anatomical infarction; green symbols represent segments located outside the infarction in normally perfused myocardium. No graph is shown for the preinfarction time point because changes (from baseline) in chord length and contractile function are plotted; before infarction all chords lie at the origin. The horizontal line y = 0 represents a segment of myocardium that has exactly the same fractional shortening as it had at the baseline study; segments that fall between that line and y = –100% are hypocontractile relative to baseline; segments falling below y = –100% demonstrate systolic dyskinesis. In the corresponding left ventricular diagrams, dashed lines indicate segments that fall below the line y = 0. Therefore, dashed green lines represent hypocontractile but perfused myocardium (borderzone myocardium) and dashed red lines represent infarcted myocardium. Note the progressive numerical increase and location of the hypocontractile, dashed segments. The data presented represent a composite constructed from averages of all eight animals. ES = end systole.