RT Journal Article SR Electronic A1 Rizzo, Toni T1 Successful Stent Implantation and Lower MACE Rates with OAS JF MD Conference Express YR 2014 FD SAGE Publications VO 14 IS 13 SP 16 OP 17 DO 10.1177/155989771413008 UL http://mdc.sagepub.com/content/14/13/16.abstract AB Calcified coronary lesions are difficult to treat for several reasons. Researchers of the Evaluate the Safety and Efficacy of OAS in Treating Severely Calcified Coronary Lesions trial [ORBIT II; NCT01092416] examined the safety and efficacy of the coronary Orbital Atherectomy System (OAS) to prepare de novo, severely calcified coronary lesions for enabling stent placement.