title: Early results of infragenicular revascularization based solely on duplex arteriography.
abstract: OBJECTIVE
  Recent reports have both advocated and questioned the utility of duplex arteriography (DA) as the sole preoperative imaging modality for planning infragenicular revascularization. This study compares the outcome of patients with critical limb ischemia who underwent infragenicular vein grafts on the basis of DA alone versus conventional preoperative contrast arteriography (CA).
  
  
  METHODS
  The study group is composed of 23 consecutive patients who underwent infragenicular vein bypass grafting solely on the basis of preoperative DA from 1998 to 1999. They were compared with 50 consecutive patients who underwent infragenicular vein bypass grafting after CA from 1996 to 1998. Peak systolic velocity and end-diastolic velocity of potential target arteries were recorded during DA studies. In situ saphenous vein grafts were used preferentially, and technical adequacy of all grafts was assessed with completion duplex or arteriography.
  
  
  RESULTS
  DA and CA groups were comparable on the basis of age and risk factors. In one limb (4%), the target artery selected by DA was abandoned because of dense calcification. No other revision in target or inflow artery was required on the basis of intraoperative completion studies. At 1 year, primary graft patency (78% vs 70%, P =.72) and limb salvage (70% vs 81%, P =.21) were comparable between the two groups. In the DA group, mean preoperative target artery peak systolic velocity in patent versus failed grafts was 49 +/- 18 cm/s versus 31 +/- 9 cm/s (P =.04), whereas mean end-diastolic velocity was 22 +/- 7 cm/s versus 14 +/- 8 cm/s (P =.08).
  
  
  CONCLUSIONS
  Infragenicular revascularization directed by DA alone provides early graft patency and limb salvage rates comparable to similar procedures that are based on CA. Preoperative DA target artery velocities may predict outcome and improve target selection. These initial results justify further clinical testing of DA as the primary imaging modality for planning infragenicular vein grafts.
authors.affiliation: Section of Vascular Surgery, Dartmouth-Hitchcock Medical Center, Dartmouth Medical School, Lebanon, NH 03756, USA.
authors.forename: R R
authors.initials: RR
authors.lastname: Proia
authors.forename: D B
authors.initials: DB
authors.lastname: Walsh
authors.forename: P R
authors.initials: PR
authors.lastname: Nelson
authors.forename: J P
authors.initials: JP
authors.lastname: Connors
authors.forename: R J
authors.initials: RJ
authors.lastname: Powell
authors.forename: R M
authors.initials: RM
authors.lastname: Zwolak
authors.forename: M F
authors.initials: MF
authors.lastname: Fillinger
authors.forename: J L
authors.initials: JL
authors.lastname: Cronenwett
mesh_terms: D000792:Angiography / Q000379:methods*; D001158:Arteries / Q000601:surgery*; D003287:Contrast Media; D005260:Female; D005268:Femoral Vein / Q000000981:diagnostic imaging* / Q000601:surgery; D005500:Follow-Up Studies; D006085:Graft Survival; D006801:Humans; D007511:Ischemia / Q000000981:diagnostic imaging* / Q000601:surgery*; D007717:Knee / Q000098:blood supply*; D008297:Male; D008875:Middle Aged; D011300:Preoperative Care; D012016:Reference Values; D012044:Regression Analysis; D012189:Retrospective Studies; D012501:Saphenous Vein / Q000637:transplantation; D012680:Sensitivity and Specificity; D012720:Severity of Illness Index; D016896:Treatment Outcome; D014654:Vascular Patency; D014656:Vascular Surgical Procedures / Q000379:methods*
chemical_list: D003287:Contrast Media