title: At what peak velocity ratio value should duplex-detected infrainguinal vein graft stenoses be revised?
abstract: OBJECTIVE
  To determine the peak velocity ratio (PVR) threshold at which to intervene and correct duplex detected vein graft stenoses.
  
  
  METHODS
  Prospective study.
  
  
  METHODS
  Infrainguinal vein grafts in patients attending the vascular studies for routine postoperative surveillance.
  
  
  METHODS
  Colour duplex detected stenotic vein graft lesions with a peak velocity ratio (PVR) between 2.0 and 2.9 were identified and monitored by serial duplex scans performed monthly for 3 months and then at 3-monthly intervals thereafter. At the end of the study period, the outcome of these lesions were analysed.
  
  
  RESULTS
  Thirty-eight lesions were identified from 32 grafts. Of these lesions, sixteen (42%) resolved, 11 (29%) remained stable and 11 (29%) progressed to a PVR of > or = 3.0 and underwent angioplasty. There were no occlusions in any of the grafts during the period of study.
  
  
  CONCLUSIONS
  Colour duplex detected vein graft stenoses with a PVR of less than 3.0 can be treated expectantly if grafts with stenoses with a PVR 2.0-2.9 are scanned every month for at least 3 months after detection.
authors.affiliation: Department of Vascular Surgery, Leicester Royal Infirmary, U.K.
authors.forename: D H
authors.initials: DH
authors.lastname: Olojugba
authors.forename: M J
authors.initials: MJ
authors.lastname: McCarthy
authors.forename: A R
authors.initials: AR
authors.lastname: Naylor
authors.forename: P R
authors.initials: PR
authors.lastname: Bell
authors.forename: N J
authors.initials: NJ
authors.lastname: London
mesh_terms: D000800:Angioplasty, Balloon; D001783:Blood Flow Velocity; D018450:Disease Progression; D006083:Graft Occlusion, Vascular / Q000000981:diagnostic imaging / Q000628:therapy*; D006801:Humans; D007511:Ischemia / Q000601:surgery; D007866:Leg / Q000098:blood supply*; D011446:Prospective Studies; D018616:Ultrasonography, Doppler, Duplex