title: Late outcomes following percutaneous coronary interventions: results from a large, observational registry.
abstract: BACKGROUND
  Randomized controlled trials report short- and medium- term outcomes following percutaneous coronary intervention (PCI), but their applicability to the general population is not known. Data regarding the long-term clinical outcomes of patients undergoing PCI are lacking.
  
  
  OBJECTIVE
  To determine the long-term outcomes of 'all-comers' undergoing PCI at a large-volume tertiary cardiac referral centre.
  
  
  METHODS
  A total of 12,662 consecutive patients undergoing an index procedure and entered into the University Health Network's (Toronto, Ontario) prospective registry between April 2000 and September 2007 were identified. In-hospital outcomes were assessed. Follow-up data were obtained through linkage to a provincial registry. Kaplan-Meier analysis was performed to calculate unadjusted survival rates, and Cox multiple regression analysis identified independent predictors of late mortality, major adverse cardiac events and all cardiovascular events.
  
  
  RESULTS
  The population included a relatively high-risk patient cohort, with 19% older than 75 years of age, 28% with diabetes, 61% with multivessel disease and 1.3% in cardiogenic shock. Urgent procedures comprised 53% of all cases. The all-cause mortality rate at seven years follow-up was 10.6%. Repeat PCI occurred in 14.2% of patients, and coronary artery bypass grafting in 4.2%. Men showed a significant unadjusted survival advantage compared with women. Procedural characteristics such as incomplete revascularization and residual stenosis, in addition to established risk factors, were predictors of poorer long-term outcomes. Cardiogenic shock was the strongest predictor of late mortality.
  
  
  CONCLUSIONS
  In the present large registry of 'all-comers' for PCI, longterm major adverse cardiac event rates were low and consistent with outcomes from randomized controlled trials. These data reflect a large cohort in real-world clinical practice, and may help clinicians further characterize and better treat high-risk patients who are undergoing PCI.
authors.affiliation: University Health Network, University of Toronto, Ontario.
authors.forename: Clare E
authors.initials: CE
authors.lastname: Appleby
authors.forename: Karen
authors.initials: K
authors.lastname: Mackie
authors.forename: Vladimír
authors.initials: V
authors.lastname: Dzavík
authors.forename: Joan
authors.initials: J
authors.lastname: Ivanov
mesh_terms: D000368:Aged; D015906:Angioplasty, Balloon, Coronary / Q000401:mortality; D015331:Cohort Studies; D001026:Coronary Artery Bypass / Q000401:mortality; D003324:Coronary Artery Disease / Q000175:diagnosis / Q000401:mortality / Q000601:surgery / Q000628:therapy*; D054855:Drug-Eluting Stents / Q000706:statistics & numerical data; D005260:Female; D005500:Follow-Up Studies; D006785:Hospitals, University; D006801:Humans; D053208:Kaplan-Meier Estimate; D008297:Male; D008499:Medical Records; D008875:Middle Aged; D011237:Predictive Value of Tests; D016016:Proportional Hazards Models; D011446:Prospective Studies; D012044:Regression Analysis; D012307:Risk Factors; D015607:Stents / Q000706:statistics & numerical data; D016019:Survival Analysis; D016896:Treatment Outcome