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Figure 4 Histopathologic specimens of the left ventricular myocardium (upper panel) in dogs with transmural (left) and subendocardial (right) reperfused anterior infarct. The corresponding short-axis tagged images of the left ventricle at end-systole, at rest and 5 µg·kg–1·min–1 dobutamine are shown in midpanel. Regional myocardial strain maps (circumferential shortening) by harmonic phase imaging are displayed in the lower panel. Black indicates shortening and yellow indicates stretching. MI = myocardial infarction.
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