Chambers, Jeffrey W Pivotal trial to evaluate the safety and efficacy of the orbital atherectomy system in treating de novo, severely calcified coronary lesions (ORBIT II). [electronic resource] - JACC. Cardiovascular interventions May 2014 - 510-8 p. digital Publication Type: Clinical Trial; Journal Article; Multicenter Study; Research Support, Non-U.S. Gov't ISSN: 1876-7605 Standard No.: 10.1016/j.jcin.2014.01.158 doi Subjects--Topical Terms: AgedAtherectomy, Coronary--adverse effectsCoronary Stenosis--diagnosisEquipment DesignFemaleHumansMaleMyocardial Infarction--etiologyPercutaneous Coronary Intervention--instrumentationProspective StudiesSeverity of Illness IndexStentsTime FactorsTreatment OutcomeUnited StatesVascular Calcification--diagnosis