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Figure 1 An example of intravascular ultrasound (IVUS)-guided spot stenting (SS). (A) Preprocedural angiogram and IVUS images of a long lesion in the intermediate branch. The IVUS catheter could not cross the distal part of the lesion. (B) After balloon angioplasty. Angiogram and IVUS image after dilation with a 3.5 x 20 mm balloon. Intravascular ultrasound revealed a dissection and suboptimal dilation at the lesion site (74% residual stenosis). (C) After stent implantation of a 16-mm-long NIR stent. The angiogram and IVUS image show a dissection distal to the stent; the lumen at this site is acceptable (48% residual stenosis by IVUS), and no further stenting was performed. AS = area stenosis; LA = lumen area; LD = lumen diameter, VA = vessel area; VD = vessel diameter.