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Figure 5 These averaged peak velocities and coronary flow reserves are of the same patient as in Figure 1 after plain old balloon angioplasty, which was done with a 3.0-mm-diameter balloon catheter at 10 atm twice. After plain old balloon angioplasty, there was no significant stenosis on coronary angiography (A), and coronary flow reserve turned to normal (2.3) (B, C). Moreover, the flow pattern changed from a disturbed pattern to a pulsatile pattern.