title: Primary endpoint results of the OMEGA Study: One-year clinical outcomes after implantation of a novel platinum chromium bare metal stent.
abstract: OBJECTIVE
  Bare metal stents (BMS) have similar rates of death and myocardial infarction (MI) compared to drug-eluting stents (DES). DES lower repeat revascularization rates compared to BMS, but may have higher rates of late stent thrombosis (ST) potentially due to impaired endothelialization requiring longer dual anti-platelet therapy (DAPT). OMEGA evaluated a novel BMS designed to have improved deliverability and radiopacity, in comparison to currently available platforms.
  
  
  METHODS
  OMEGA was a prospective, multicenter, single-arm study enrolling 328 patients at 37 sites (US and Europe). Patients received the OMEGA stent (bare platinum chromium element stent) for the treatment of de novo native coronary artery lesions (≤28 mm long; diameter ≥2.25 mm to ≤4.50mm). The primary endpoint was 9-month target lesion failure (TLF: cardiac death, target vessel-related MI, target lesion revascularization [TLR]) compared to a prespecified performance goal (PG) based on prior generation BMS. All major cardiac events were independently adjudicated. DAPT was required for a minimum of 1 month post procedure.
  
  
  RESULTS
  In the OMEGA study, the mean age was 65; 17% had diabetes mellitus. The primary endpoint was met; 9 month TLF rate was 11.5%, and the upper 1-sided 95% confidence bound of 14.79% was less than the prespecified PG of 21.2% (p<0.0001). One-year event rates were low including a TLF rate of 12.8% and an ST rate of 0.6% at 12 months.
  
  
  CONCLUSIONS
  One-year outcomes of OMEGA show low rates of TLF, revascularization and ST. This supports safety and efficacy of the OMEGA BMS for the treatment of coronary artery disease.
authors.affiliation: MedStar Union Memorial Hospital, Baltimore MD, USA. Electronic address: john.wang@medstar.net.
authors.forename: John C
authors.initials: JC
authors.lastname: Wang
authors.affiliation: Centre Hôpital Universitaire Rangueil, Toulouse, France. Electronic address: carrie.didier@chu-toulouse.fr.
authors.forename: Didier
authors.initials: D
authors.lastname: Carrié
authors.affiliation: Hospital Clinic, University of Barcelona, Spain. Electronic address: MASOTTI@clinic.ub.es.
authors.forename: Monica
authors.initials: M
authors.lastname: Masotti
authors.affiliation: Pauls Stradins Clinical University Hospital, University of Latvia, Riga, Latvia. Electronic address: a.a.erglis@stradini.lv.
authors.forename: Andrejs
authors.initials: A
authors.lastname: Erglis
authors.affiliation: Arkansas Heart Hospital, Little Rock, AR. Electronic address: David.Mego@arheart.com.
authors.forename: David
authors.initials: D
authors.lastname: Mego
authors.affiliation: University of Vermont Medical Center, Burlington VT, USA. Electronic address: Matthew.Watkins@vtmednet.org.
authors.forename: Matthew W
authors.initials: MW
authors.lastname: Watkins
authors.affiliation: Boston Scientific, Marlborough MA USA. Electronic address: Paul.underwood@bsci.com.
authors.forename: Paul
authors.initials: P
authors.lastname: Underwood
authors.affiliation: Boston Scientific, Marlborough MA USA. Electronic address: Dominic.allocco@bsci.com.
authors.forename: Dominic J
authors.initials: DJ
authors.lastname: Allocco
authors.affiliation: Kerckhoff Heart and Thoraxcenter, Bad Nauheim, Germany. Electronic address: C.Hamm@kerckhoff-klinik.de.
authors.forename: Christian W
authors.initials: CW
authors.lastname: Hamm
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D015906:Angioplasty, Balloon, Coronary / Q000295:instrumentation* / Q000379:methods / Q000401:mortality; D002857:Chromium / Q000627:therapeutic use; D017023:Coronary Angiography / Q000379:methods; D023903:Coronary Restenosis / Q000000981:diagnostic imaging / Q000401:mortality; D023921:Coronary Stenosis / Q000000981:diagnostic imaging / Q000401:mortality / Q000628:therapy*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008670:Metals / Q000627:therapeutic use*; D008875:Middle Aged; D061214:Patient Safety / Q000706:statistics & numerical data*; D010984:Platinum / Q000627:therapeutic use; D011446:Prospective Studies; D011474:Prosthesis Design; D018570:Risk Assessment; D012720:Severity of Illness Index; D016037:Single-Blind Method; D015607:Stents; D015996:Survival Rate; D013997:Time Factors; D016896:Treatment Outcome
chemical_list: D008670:Metals; D002857:Chromium; D010984:Platinum
keywords: Bare metal stent; Platinum chromium