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The drug-coated balloon (DCB) angioplasty is considered a standard therapeutic option for in-stent restenosis. In the present case, we observed high-intensity spots on optical coherence tomography (OCT) and bright spots on coronary angioplasty (CAS) immediately after DCB angioplasty. The superficial high-intensity area on OCT presumably corresponded with the bright spots on CAS. The high-intensity superficial regions were thought to represent an iopromide/paclitaxel mixture. The present serial observation demonstrated that the eluted drugs remained for at least 2 months but disappeared within 6 months. At the site where we observed the drugs, neointimal growth was successfully inhibited and stabilized at the 6-month follow-up. The association of eluted drugs after DCB angioplasty with consequent neointimal growth is of scientific interest. Further prospective imaging studies with a large sample size are warranted to clarify this association.

journal of international medical research

Serial optical coherence tomography and angioscopic assessments of 10-year in-stent restenosis of Cypher sirolimus-eluting stent treated with drug-coated balloon angioplasty