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Figure 4 The contrast intensity (CI)–frame number curves from the anterior interventricular septum in the patient shown in Figure 2 (left panel) and the patient in Figure 3 (right panel). The alteration in CI fit well with the decay function both at baseline (solid circles) and during adenosine triphosphate (ATP) infusion (open circles) in both territories. Although the magnitude of decay was less during ATP infusion than at baseline in a normal coronary territory (left), it was greater in a severely stenosed coronary territory (right).
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