title: Renal arterial stenosis in renal allografts: retrospective study of predisposing factors and outcome after percutaneous transluminal angioplasty.
abstract: OBJECTIVE
  To determine the predisposing factors to transplant renal arterial stenosis (TRAS) and assess the outcome of percutaneous transluminal angioplasty (PTA) as the primary treatment.
  
  
  METHODS
  Of 831 renal allograft recipients (584 cadaveric, 247 living related) between January 1991 and December 1998, 72 had hypertension and/or renal dysfunction. All 72 underwent arteriography, and their medical charts were retrospectively reviewed.
  
  
  RESULTS
  Prevalence of TRAS was 3.1% (26 of 831). Technical success rate of PTA was 94% (16 of 17), and clinical success rate was 82% (14 of 17). Those with renal dysfunction had a mean pre-PTA creatinine value of 2.6 mg/dL (230 micromol/L) +/- 0.5 (SD) versus a 1-week post-PTA value of 1.7 mg/dL (150 micromol/L) +/- 0.3 (P <.001). Of those with hypertension, all but one had substantial improvement in mean diastolic blood pressure. At 26.9 months mean follow-up in 16 patients with successful PTA, two stenoses reoccurred, and two grafts were lost to chronic rejection. TRAS was present in 14 of 45 end-to-side anastomoses and 12 of 27 end-to-end anastomoses (P =.31), and TRAS was more prevalent in cadaveric grafts (24 of 584) than in living related grafts (two of 247). In cadaveric grafts, the mean cold ischemia time was 29.0 hours +/- 6.9 in those with TRAS (n = 24), as compared with 25.5 hours +/- 8.1 in those with no TRAS (n = 39; P = .35). Seven of 17 patients with acute rejection and six of 35 with chronic rejection had TRAS.
  
  
  CONCLUSIONS
  Primary treatment of TRAS with PTA has good intermediate-term results. TRAS is more prevalent in cadaveric allografts with long cold ischemia time.
authors.affiliation: Department of Radiology, Indiana University Medical Center, 550 N University Blvd, Rm 0279, Indianapolis, IN 46202, USA. nhpatel@iupui.edu
authors.forename: N H
authors.initials: NH
authors.lastname: Patel
authors.forename: R M
authors.initials: RM
authors.lastname: Jindal
authors.forename: T
authors.initials: T
authors.lastname: Wilkin
authors.forename: S
authors.initials: S
authors.lastname: Rose
authors.forename: M S
authors.initials: MS
authors.lastname: Johnson
authors.forename: H
authors.initials: H
authors.lastname: Shah
authors.forename: J
authors.initials: J
authors.lastname: Namyslowski
authors.forename: K P
authors.initials: KP
authors.lastname: Moresco
authors.forename: S O
authors.initials: SO
authors.lastname: Trerotola
mesh_terms: D000328:Adult; D000800:Angioplasty, Balloon; D002102:Cadaver; D015984:Causality; D005260:Female; D006801:Humans; D016030:Kidney Transplantation; D019520:Living Donors; D008297:Male; D011183:Postoperative Complications / Q000453:epidemiology* / Q000628:therapy*; D015995:Prevalence; D012078:Renal Artery Obstruction / Q000453:epidemiology* / Q000628:therapy*; D012189:Retrospective Studies; D013997:Time Factors; D016896:Treatment Outcome