title: Effect of prior revascularization on outcome following percutaneous coronary intervention; NHLBI Dynamic Registry.
abstract: OBJECTIVE
  An increasing number of patients undergoing percutaneous coronary intervention (PCI) have experienced previous revascularization procedures. Their outcome after PCI has seldom been compared to that of patients without prior procedures. This study investigates which elements of prior revascularization affect in-hospital and long-term outcome after PCI.
  
  
  RESULTS
  Baseline characteristics as well as in-hospital and 1-year outcomes were compared in 4010 consecutive patients undergoing PCI in the NHLBI Dynamic Registry, categorized by type of prior procedure. In-hospital mortality was lowest and procedural success highest among patients with prior PCI only. Patients with prior coronary artery bypass grafting (CABG) had higher rates for the combined endpoint of death and myocardial infarction (MI) at 1 year compared to patients with no prior procedures. However, in multivariate regression analysis adjusting for potential confounders, neither prior PCI nor prior CABG were independent predictors of death or death/MI at 1 year. Patients with prior procedure had higher rates for repeat PCI and patients with prior PCI had higher rates for CABG during the year following the index procedures. These associations persisted after adjustment for potential confounders. Finally, patients with prior procedures had a higher prevalence of angina at 1 year.
  
  
  CONCLUSIONS
  Due to adverse baseline characteristics, patients with prior CABG have higher rates for death/MI during the first year after PCI and both groups of patients with prior procedures have higher revascularization rates. However, only the associations with repeat revascularization persist after adjustment for baseline and procedural factors.
authors.affiliation: Department of Medicine, Montreal Heart Institute, Montreal, Quebec, Canada
authors.forename: M G
authors.initials: MG
authors.lastname: Bourassa
authors.forename: K M
authors.initials: KM
authors.lastname: Detre
authors.forename: J M
authors.initials: JM
authors.lastname: Johnston
authors.forename: H A
authors.initials: HA
authors.lastname: Vlachos
authors.forename: R
authors.initials: R
authors.lastname: Holubkov
mesh_terms: D000368:Aged; D000787:Angina Pectoris / Q000209:etiology; D015906:Angioplasty, Balloon, Coronary; D001158:Arteries / Q000473:pathology / Q000601:surgery; D001026:Coronary Artery Bypass; D003327:Coronary Disease / Q000150:complications / Q000453:epidemiology / Q000628:therapy; D003331:Coronary Vessels / Q000473:pathology / Q000601:surgery; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D015999:Multivariate Analysis; D009203:Myocardial Infarction / Q000209:etiology / Q000401:mortality; D009204:Myocardial Revascularization; D011183:Postoperative Complications / Q000209:etiology / Q000401:mortality; D015995:Prevalence; D012086:Reoperation; D012307:Risk Factors; D016019:Survival Analysis; D013995:Time; D016896:Treatment Outcome; D014481:United States / Q000453:epidemiology