title: Prognosis of non-ST-segment elevation acute coronary syndrome in patients with prior percutaneous coronary intervention.
abstract: BACKGROUND
  There is disagreement concerning the prognostic value of a prior history of percutaneous coronary intervention (PCI) in patients with non-ST-segment elevation acute coronary syndromes (ACS). This study characterizes these patients and investigates the impact of prior PCI on their prognosis.
  
  
  METHODS
  448 consecutive patients admitted due to ACS between 1998 and 2000 were evaluated. Patients with prior PCI were compared to the others with regard to baseline demographic and clinical features. The study endpoint was death or myocardial infarction at one-year follow-up. The impact of prior PCI on the outcome was analyzed. In patients with prior PCI, the prognostic value of the time interval between PCI and current admission was assessed. In those patients who underwent coronary angiography during the index hospitalization, the culprit lesion features were evaluated.
  
  
  RESULTS
  134 patients (30%) with prior PCI were identified. Overall ACS patients had an event rate of 19% at one year. A history of prior PCI was not an independent predictor of outcome, but in the 44 patients with PCI performed during the 117 days before the index hospitalization, the event rate was significantly higher (30% versus 13%). Prior PCI in the previous 117 days was an independent risk predictor (adjusted OR 4.81; 95% CI, 1.57-14.71; p = 0.006). In these patients restenosis was the most frequent culprit lesion (60% versus 30%; p = 0.003).
  
  
  CONCLUSIONS
  In ACS patients, a history of PCI in the previous four months is an independent predictor of adverse outcome at one-year follow-up.
authors.affiliation: Serviço de Cardiologia do Hospital de Santa Cruz, Carnaxide, Portugal.
authors.forename: José Ferreira
authors.initials: JF
authors.lastname: Santos
authors.forename: Jorge
authors.initials: J
authors.lastname: Ferreira
authors.forename: Carlos
authors.initials: C
authors.lastname: Aguiar
authors.forename: Pedro
authors.initials: P
authors.lastname: Gonçalves
authors.forename: Luís
authors.initials: L
authors.lastname: Raposo
authors.forename: Manuel
authors.initials: M
authors.lastname: Almeida
authors.forename: Ricardo
authors.initials: R
authors.lastname: Seabra-Gomes
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D015906:Angioplasty, Balloon, Coronary; D001145:Arrhythmias, Cardiac / Q000150:complications; D003327:Coronary Disease / Q000150:complications / Q000628:therapy*; D023903:Coronary Restenosis / Q000150:complications; D004562:Electrocardiography; D004812:Epidemiologic Methods; D005260:Female; D006801:Humans; D006949:Hyperlipidemias / Q000150:complications; D006973:Hypertension / Q000150:complications; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000209:etiology* / Q000401:mortality; D011379:Prognosis; D013577:Syndrome; D016896:Treatment Outcome