Fig. 3From: Comparison of optical coherence tomography-guided and intravascular ultrasound-guided rotational atherectomy for calcified coronary lesionsRepresentative one case of intravascular ultrasound (IVUS) guided rotational atherectomy (RA) images. A Pre-PCI IVUS images showed heavily calcified plaque with a 360° calcium arc. B After RA with a 1.5-mm burr, IVUS image showed reflection behind the calcification. The phenomenon usually was considered that the calcium was not thick. C After stent implantation with high pressure post-dilatation, IVUS images still showed stent under-expansion (73%)Back to article page