Shlofmitz E, et al. – This study compared the clinical outcomes between patients who underwent lesion assessment with either intravascular ultrasound (IVUS) or angiography alone prior to orbital atherectomy (OA) for severely calcified coronary lesions. Use of IVUS for assessing the degree of lesion calcification prior to OA was associated with significantly fewer stents placement, increased post–OA minimal lumen diameter (MLD), and similar 3–year major adverse cardiac events (MACE) outcomes, compared to angiographic assessment of the degree of lesion calcification.