title: Outcome in high risk patients with unprotected left main coronary artery stenosis treated with percutaneous coronary intervention.
abstract: OBJECTIVE
  We examined mortality, risk of myocardial infarction (MI), and target lesion revascularization (TLR) in high-risk patients with unprotected left main (LM) percutaneous coronary intervention (PCI) in Western Denmark.
  
  
  BACKGROUND
  PCI of left main coronary artery lesions may be an alternative to coronary artery bypass grafting in high-risk surgical patients.
  
  
  METHODS
  From January 2005 to May 2007, all patients who had unprotected LM PCI with stent implantation were identified in the Western Denmark Heart Registry. The indications for PCI were: (1) ST segment elevation MI (STEMI), (2) non-STEMI (NSTEMI) or unstable angina, and (3) stable angina. All patients were followed up for 18 months.
  
  
  RESULTS
  A total of 344 patients were treated with LM PCI (STEMI: 71, NSTEMI/unstable angina: 157, and stable angina: 116). In STEMI patients, the median logistic EuroSCORE was 22.5 (interquartile range 12.5-39.5), in non-STEMI (NSTEMI)/unstable angina patients 13.8 (4.8-23.9), and in stable angina patients 4.8 (2.2-10.4). Mortality after 18 months 38.0, 18.5, and 11.2% (P < 0.001) in patients with STEMI, NSTEMI/unstable angina, and stable angina, respectively. MI after 18 months was 9.9, 6.4, and 6.0% (P = ns), respectively. Four subacute and one late definite stent thrombosis were seen. TLR occurred in 5.6, 4.5, and 6.9% (P = ns) of patients, respectively.
  
  
  CONCLUSIONS
  After PCI, patients with STEMI and LM culprit lesion have a high-mortality risk, whereas long-term outcome for patients with NSTEMI and stable angina pectoris is comparable with other high surgical risk patients with unprotected left main lesion. Further, TLR rates and risk of stent thrombosis were low.
authors: Department of Cardiology, Odense University Hospital, Odense, Denmark. okkels@dadlnet.dk
authors: Lisette Okkels
authors: LO
authors: Jensen
authors: Anne
authors: A
authors: Kaltoft
authors: Per
authors: P
authors: Thayssen
authors: Hans Henrik
authors: HH
authors: Tilsted
authors: Evald Hoej
authors: EH
authors: Christiansen
authors: Kirsten Vilain
authors: KV
authors: Mikkelsen
authors: Michael
authors: M
authors: Maeng
authors: Knud Noerregaard
authors: KN
authors: Hansen
authors: Anton Boel
authors: AB
authors: Villadsen
authors: Morten
authors: M
authors: Madsen
authors: Jens Flensted
authors: JF
authors: Lassen
authors: Knud Erik
authors: KE
authors: Pedersen
authors: Leif
authors: L
authors: Thuesen
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D000787:Angina Pectoris / Q000209:etiology; D000789:Angina, Unstable / Q000209:etiology; D015906:Angioplasty, Balloon, Coronary / Q000009:adverse effects* / Q000295:instrumentation / Q000401:mortality; D023921:Coronary Stenosis / Q000150:complications / Q000401:mortality / Q000628:therapy*; D003718:Denmark / Q000453:epidemiology; D018572:Disease-Free Survival; D005260:Female; D006801:Humans; D053208:Kaplan-Meier Estimate; D016015:Logistic Models; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000209:etiology* / Q000401:mortality; D016017:Odds Ratio; D018579:Patient Selection; D012042:Registries; D012189:Retrospective Studies; D018570:Risk Assessment; D012307:Risk Factors; D015607:Stents; D013927:Thrombosis / Q000209:etiology* / Q000401:mortality; D013997:Time Factors; D016896:Treatment Outcome