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Figure 4 Representative Coronary Blood Flow Velocity Spectra During the 4 PCI Procedures
(A) The numbers of high-intensity transient signals (HITS) were 12 immediately after first balloon angioplasty (BA), and (B) only 2 after second BA, but increased to 17 after stenting. (C) Only 1 HITS was found after post-dilation. (D) These HITS were only observed within the initial 3 beats after balloon deflation.
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