title: Natural history and clinical outcome of patients with documented carotid artery occlusion.
abstract: BACKGROUND
  An occluded internal carotid artery (ICA) is considered a "safe artery" as it causes few symptoms. However, it has recently been suggested that spontaneous recanalisation of ICA occlusions may occur.
  
  
  OBJECTIVE
  To determine the incidence of ICA recanalisation among patients with a previously documented occluded ICA.
  
  
  METHODS
  Patients with a documented ICA occlusion between September 2001 and January 2003 were identified. Patients who consented to participate had carotid duplex scans performed. Demographic and clinical data were collected. Statistical analyses were performed as appropriate.
  
  
  RESULTS
  The total number of carotid duplex scans performed during the original study period was 719. An occluded ICA was identified in 30 (4.2%) patients. Of 19 patients who were rescanned two (11%) had recanalised a previously occluded ICA.
  
  
  CONCLUSIONS
  Recanalisation occurs in a small number of patients who may need long-term surveillance.
authors.affiliation: Department of Vascular Surgery, Mid-Western Regional Hospital, Dooradoyle, Limerick, Republic of Ireland.
authors.forename: S
authors.initials: S
authors.lastname: Cheema
authors.forename: M
authors.initials: M
authors.lastname: Clarke-Moloney
authors.forename: E G
authors.initials: EG
authors.lastname: Kavanagh
authors.forename: P E
authors.initials: PE
authors.lastname: Burke
authors.forename: P A
authors.initials: PA
authors.lastname: Grace
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D002343:Carotid Artery, Internal; D016893:Carotid Stenosis / Q000000981:diagnostic imaging / Q000401:mortality / Q000601:surgery*; D002548:Cerebral Revascularization / Q000379:methods*; D015331:Cohort Studies; D016894:Endarterectomy, Carotid / Q000009:adverse effects / Q000379:methods*; D005260:Female; D006801:Humans; D007494:Ireland; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications / Q000000981:diagnostic imaging / Q000401:mortality; D011379:Prognosis; D012008:Recurrence; D012189:Retrospective Studies; D018570:Risk Assessment; D012720:Severity of Illness Index; D020521:Stroke / Q000209:etiology / Q000401:mortality; D016019:Survival Analysis; D016896:Treatment Outcome; D018616:Ultrasonography, Doppler, Duplex