title: Impact of mild or moderate chronic kidney disease on the frequency of restenosis: results from the PRESTO trial.
abstract: OBJECTIVE
  The goal of this study was to determine if restenosis is increased in mild and moderate chronic kidney disease (CKD) patients after percutaneous coronary intervention (PCI).
  
  
  BACKGROUND
  Mortality is increased in CKD after PCI. Restenosis may contribute to increased late mortality.
  
  
  METHODS
  We analyzed 11,187 patients with a creatinine <1.8 mg/dl from the Prevention of REStenosis with Tranilast and its Outcomes (PRESTO) trial, grouped by estimated creatinine clearance (CrCl) (<60, 60 to 89, >89 ml/min). The Cox proportional hazards models investigated the association between CrCl group and death, myocardial infarction, and target vessel revascularization (TVR). Generalized estimating equation regression models determined the association between CrCl group and lesion-specific restenosis.
  
  
  RESULTS
  At 30 days, there was no difference in myocardial infarction, death, or TVR between the CrCl groups. At nine months, mortality was higher in the lowest CrCl group (2.2%, 1.2%, 0.8%; p < 0.001), which was no longer significant after adjusting for confounding variables. Myocardial infarction and TVR were not different between the groups. In patients undergoing protocol follow-up angiography, restenosis (>/=50%) was not increased with CKD (32%, 32%, 37%; p = 0.02).
  
  
  CONCLUSIONS
  Mortality nine months after PCI is mildly increased in mild or moderate CKD patients. However, restenosis is not and does not account for the increased mortality.
authors.affiliation: Mayo Clinic, Rochester, Minnesota, USA.
authors.forename: Patricia J M
authors.initials: PJ
authors.lastname: Best
authors.forename: Peter B
authors.initials: PB
authors.lastname: Berger
authors.forename: Barry R
authors.initials: BR
authors.lastname: Davis
authors.forename: Cindy L
authors.initials: CL
authors.lastname: Grines
authors.forename: H Mehrdad
authors.initials: HM
authors.lastname: Sadeghi
authors.forename: Brent A
authors.initials: BA
authors.lastname: Williams
authors.forename: James T
authors.initials: JT
authors.lastname: Willerson
authors.forename: Jeffrey R
authors.initials: JR
authors.lastname: Granett
authors.forename: David R
authors.initials: DR
authors.lastname: Holmes
mesh_terms: D000368:Aged; D015906:Angioplasty, Balloon, Coronary; D015415:Biomarkers / Q000097:blood / Q000652:urine; D019917:Blood Vessel Prosthesis Implantation; D002908:Chronic Disease; D017023:Coronary Angiography; D023903:Coronary Restenosis / Q000000981:diagnostic imaging / Q000209:etiology*; D003404:Creatinine / Q000378:metabolism; D003920:Diabetes Mellitus / Q000000981:diagnostic imaging / Q000628:therapy; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007674:Kidney Diseases / Q000000981:diagnostic imaging / Q000628:therapy*; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications / Q000000981:diagnostic imaging / Q000209:etiology*; D011446:Prospective Studies; D012720:Severity of Illness Index; D015607:Stents; D016896:Treatment Outcome
chemical_list: D015415:Biomarkers; D003404:Creatinine