PT - JOURNAL ARTICLE AU - Rizzo, Toni ED - Chambers, Jeffrey TI - Successful Stent Implantation and Lower MACE Rates with OAS DP - 2014 Nov 01 TA - MD Conference Express PG - 16--17 VI - 14 IP - 13 4099 - http://mdc.sagepub.com/content/14/13/16.short 4100 - http://mdc.sagepub.com/content/14/13/16.full 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.