title: The effect of prior percutaneous coronary intervention on the immediate and late outcome after coronary artery bypass grafting: systematic review and meta-analysis.
abstract: BACKGROUND
  A number of studies reported on a possible increased risk of morbidity and mortality after coronary artery bypass grafting in patients with prior percutaneous coronary intervention.
  
  
  METHODS
  A systematic review and meta-analysis of studies comparing the outcome of patients undergoing coronary surgery with or without prior percutaneous coronary intervention was performed. Only studies reporting results of adjusted analysis and excluding acute percutaneous coronary intervention failures were included in this meta-analysis.
  
  
  RESULTS
  Literature search yielded nine studies reporting on 68,645 patients who underwent coronary surgery. Of them, 8,358 (12.2%) had a prior percutaneous coronary intervention. Patients without prior percutaneous coronary intervention were significantly older (p=0.002), had significantly higher prevalence of left main stenosis (p=0.005) and three-vessel disease (p<0.0001). Prior percutaneous coronary intervention was associated with higher risk of resternotomy for bleeding (p=0.04) and dialysis (p=0.003). Thirty-day/in-hospital mortality was significantly higher in patients with prior percutaneous coronary intervention (pooled rate: 2.7% vs 2.0%, risk ratio 1.39, 95% confidence interval 1.06-1.84, p=0.02) as confirmed also by generic inverse variance analysis (risk ratio 1.47, 95% confidence interval 1.12-1.93, p=0.005). Prior percutaneous coronary intervention did not affect late outcome (five studies included, risk ratio 1.07, 95% confidence interval 0.90-1.28, p=0.43).
  
  
  CONCLUSIONS
  Prior percutaneous coronary intervention seems to be associated with an increased risk of immediate postoperative morbidity and mortality after coronary surgery, but does not affect late mortality. These results are not conclusive and need to be confirmed by studies of better quality evaluating the impact of indication, timing, type of stents, amount of treated vessels and number of previous percutaneous coronary interventions.
authors.affiliation: Department of Surgery, Oulu University Hospital, Oulu, Finland.
authors.forename: F
authors.initials: F
authors.lastname: Biancari
authors.affiliation: Department of Surgical and Morphological Sciences, Cardiac Surgery Unit, Varese University Hospital, University of Insubria, Varese, Italy.
authors.forename: G
authors.initials: G
authors.lastname: Mariscalco
authors.affiliation: Cardiac Surgery Unit, A.O.U. Policlinico-Vittorio Emanuele, University of Catania, Italy.
authors.forename: A S
authors.initials: AS
authors.lastname: Rubino
authors.affiliation: Division of Cardiology, Department of Medicine, University of Verona, Verona, Italy.
authors.forename: G
authors.initials: G
authors.lastname: Vinco
authors.affiliation: Division of Cardiac Surgery, University of Verona, Verona, Italy.
authors.forename: F
authors.initials: F
authors.lastname: Onorati
authors.affiliation: Division of Cardiac Surgery, University of Verona, Verona, Italy.
authors.forename: G
authors.initials: G
authors.lastname: Faggian
authors.affiliation: Department of Surgery, Oulu University Hospital, Oulu, Finland.
authors.forename: T
authors.initials: T
authors.lastname: Juvonen
authors.affiliation: Heart Center, Turku University Hospital, Turku, Finland.
authors.forename: J
authors.initials: J
authors.lastname: Airaksinen
keywords: coronary artery bypass; meta-analysis; percutaneous coronary intervention; previous; prior