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Figure 4 (Left) Example of myocardial video-intensity (MVI) time curves obtained from one three-dimensional slice of an isolated rabbit heart at three levels of coronary flow: BL, baseline; F1, 40% to 60% of baseline flow; F2, 10% to 20% of baseline flow. (Right) Average values of myocardial peak contrast inflow rate (PCIR) measured at the different levels of coronary flow (*p < 0.0001 compared with baseline) at each of the three levels of the ventricle.