title: Carotid endarterectomy under local anaesthesia does not increase plasma homocysteine concentration.
abstract: BACKGROUND
  The purpose of this cohort study was to evaluate the effect of carotid endarterectomy under local anaesthesia on homocysteine (Hcy) concentrations.
  
  
  METHODS
  Of 100 patients with internal carotid artery (ICA) stenosis >70%, the complete data set was available for 91 patients (39 asymptomatic and 52 symptomatic). All patients underwent eversion endarterectomy of the ICA under regional anaesthesia.
  
  
  RESULTS
  Thirty-two percent of the examined patients had a total Hcy above 15 micromol/l. The mean Hcy levels preoperatively were 13.9+/-4.8 micromol/l. The Hcy levels on day 5 were 13.1+/-5.0 micromol/l and after 6 months 14.0+/-5.8 micromol/l. There was no significant change during follow-up. No intraoperative strokes and deaths were observed and during the 6 months follow-up no recurrent strokes, TIAs or deaths occurred.
  
  
  CONCLUSIONS
  Patients undergoing carotid endarterectomy under regional anaesthesia do not have an increase in total Hcy postoperatively. This finding is in contrast to results from cardiac surgery and carotid endarterectomy in a recently published animal study, both performing surgery under general anaesthesia.
authors.affiliation: Department of General and Vascular Surgery, Wilhelminenspital Vienna, Vienna, Austria. afshin_assadian@yahoo.de
authors.forename: A
authors.initials: A
authors.lastname: Assadian
authors.forename: U
authors.initials: U
authors.lastname: Eidher
authors.forename: C
authors.initials: C
authors.lastname: Senekowitsch
authors.forename: O
authors.initials: O
authors.lastname: Assadian
authors.forename: R
authors.initials: R
authors.lastname: Rotter
authors.forename: G W
authors.initials: GW
authors.lastname: Hagmüller
authors.forename: W
authors.initials: W
authors.lastname: Hübl
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000772:Anesthesia, Local; D015415:Biomarkers / Q000097:blood; D016893:Carotid Stenosis / Q000097:blood* / Q000601:surgery; D016894:Endarterectomy, Carotid / Q000379:methods*; D005260:Female; D005500:Follow-Up Studies; D006710:Homocysteine / Q000097:blood*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011184:Postoperative Period; D016896:Treatment Outcome
chemical_list: D015415:Biomarkers; D006710:Homocysteine