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Figure 5 Inverse correlation between the change in collateral flow index ( ${Delta}$ CFI, no unit; horizontal axis) and the normalized intracoronary electrocardiographic (ECG) ST-elevation changes ( ${Delta}$ ST, no unit; vertical axis) determined from the first to the third occlusion. Filled symbols: patients pretreated with adenosine; open symbols: patients pretreated with normal saline.

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