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Figure 7 (Top) Near en-face apical four-chamber view of the left ventricle obtained in a normal volunteer at different phases of a transient contrast inflow sequence (left to right). (Bottom left) Corresponding myocardial video-intensity (MVI) curves obtained at rest and during adenosine infusion in one myocardial slice. (Bottom right) Summary of peak contrast inflow rate (peak contrast inflow rate [PCIR], unitless after normalization) measured in three myocardial slices and averaged over all study subjects (*p < 0.01 vs. baseline).