ABSTRACT Background: The treatment of coronary arteries with heavily calcified or chronically occluded lesions has the lowest success rates when they undergo a percutaneous procedure. A strategy to reduce the volume of calcified lesions, which was part of the rescue technique to treat non-balloon dilatable stenoses, has evolved to an approach of primary lesion preparation for subsequent stenting. Methods: This is a retrospective analysis of data related to rotational atherectomies performed in complex, high-risk patients, for treating extremely calcified lesions […]