title: Percutaneous coronary intervention in native arteries versus bypass grafts in prior coronary artery bypass grafting patients: a report from the National Cardiovascular Data Registry.
abstract: OBJECTIVE
  This study examined a large registry to determine the frequency, predictors, and outcomes of native coronary artery versus bypass graft percutaneous coronary intervention (PCI) in patients with prior coronary artery bypass graft surgery (CABG).
  
  
  BACKGROUND
  The PCI target vessel and corresponding outcomes in prior CABG patients are poorly studied.
  
  
  METHODS
  We analyzed the frequency and factors associated with native versus bypass graft PCI in prior CABG patients undergoing PCI between January 1, 2004, and June 30, 2009, in the National Cardiovascular Data Registry (NCDR) CathPCI Registry. Generalized estimating equations logistic regression modeling was used to generate independent variables associated with native versus bypass graft PCI and in-hospital mortality.
  
  
  RESULTS
  During the study period, PCI in prior CABG patients represented 17.5% of the total PCI volume (300,902 of 1,721,046). The PCI target was a native coronary artery in 62.5% and a bypass graft in 37.5%: saphenous vein graft (SVG) (104,678 [34.9%]), arterial graft (7,517 [2.5%]), or both arterial graft and SVG (718 [0.2%]). Compared with patients undergoing native coronary artery PCI, those undergoing bypass graft PCI had higher-risk characteristics and more procedural complications. On multivariable analysis, several parameters (including graft stenosis and longer interval from CABG) were associated with performing native coronary PCI, and bypass graft PCI was associated with higher in-hospital mortality (adjusted odds ratio: 1.22, 95% confidence interval: 1.12 to 1.32).
  
  
  CONCLUSIONS
  Most PCIs performed in prior CABG patients are done in native coronary artery lesions. Compared with native coronary PCI, bypass graft PCI is independently associated with higher in-hospital mortality.
authors.affiliation: VA North Texas Healthcare System and University of Texas Southwestern Medical School at Dallas, Dallas, Texas, USA. esbrilakis@yahoo.com
authors.forename: Emmanouil S
authors.initials: ES
authors.lastname: Brilakis
authors.forename: Sunil V
authors.initials: SV
authors.lastname: Rao
authors.forename: Subhash
authors.initials: S
authors.lastname: Banerjee
authors.forename: Steven
authors.initials: S
authors.lastname: Goldman
authors.forename: Kendrick A
authors.initials: KA
authors.lastname: Shunk
authors.forename: David R
authors.initials: DR
authors.lastname: Holmes
authors.forename: Emily
authors.initials: E
authors.lastname: Honeycutt
authors.forename: Matthew T
authors.initials: MT
authors.lastname: Roe
mesh_terms: D000368:Aged; D015906:Angioplasty, Balloon, Coronary / Q000009:adverse effects / Q000295:instrumentation / Q000401:mortality; D016009:Chi-Square Distribution; D001026:Coronary Artery Bypass / Q000009:adverse effects* / Q000401:mortality; D003324:Coronary Artery Disease / Q000401:mortality / Q000601:surgery / Q000628:therapy*; D023903:Coronary Restenosis / Q000453:epidemiology / Q000401:mortality / Q000628:therapy*; D005260:Female; D006083:Graft Occlusion, Vascular / Q000453:epidemiology / Q000401:mortality / Q000628:therapy*; D017052:Hospital Mortality; D006801:Humans; D016015:Logistic Models; D008297:Male; D008875:Middle Aged; D016017:Odds Ratio; D012042:Registries; D018570:Risk Assessment; D012307:Risk Factors; D015607:Stents; D013997:Time Factors; D016896:Treatment Outcome; D014481:United States / Q000453:epidemiology