title: Characteristics of patients presenting with central retinal artery occlusion with and without giant cell arteritis.
abstract: BACKGROUND
  In patients with concurrent central retinal artery occlusion (CRAO) and giant cell arteritis (GCA), prompt recognition and early treatment are crucial to prevent further visual loss in the contralateral eye. The objective of this study was to describe a series of patients with CRAO resulting from GCA and to compare them with patients with isolated CRAO.
  
  
  METHODS
  The patient database for a retina service in Philadelphia was searched to identify patients admitted between 1983 and 1993 with a diagnosis of biopsyproven GCA and CRAO. For every patient with CRAO caused by GCA, the next patient admitted for management of acute isolated CRAO was identified; these latter patients constituted the control group. The visual acuity and baseline characteristics of the two groups were compared.
  
  
  RESULTS
  Eleven patients with acute CRAO and GCA were admitted during the study period. In both the case and control groups seven patients (64%) were women and nine patients (82%) were white. Six subjects (54%) in the case group and seven (64%) in the control group had a history of hypertension; the values for diabetes mellitus were two (18%) and zero respectively. Four patients (36%) with CRAO and GCA were cigarette smokers, compared with eight patients (73%) with CRAO alone. None of these differences were statistically significant. Patients with CRAO related to GCA were more likely than those with isolated CRAO to have counting fingers or better vision at presentation (odds ratio 2.22 [95% confidence interval 0.37 to 13.2]), but this trend was not statistically significant.
  
  
  CONCLUSIONS
  Patients who presented with CRAO related to GCA were more than twice as likely as those with CRAO alone to have counting fingers or better visual acuity at the time of presentation. However, owing to the small sample, the power of this study to detect a true difference between the two groups was limited.
authors.affiliation: Retina Service, Wills Eye Hospital, 900 Walnut St., Philadelphia, PA 19107, USA. drbpconn@yahoo.com
authors.forename: B P
authors.initials: BP
authors.lastname: Connolly
authors.forename: A
authors.initials: A
authors.lastname: Krishnan
authors.forename: G K
authors.initials: GK
authors.lastname: Shah
authors.forename: J
authors.initials: J
authors.lastname: Whelan
authors.forename: G C
authors.initials: GC
authors.lastname: Brown
authors.forename: R C
authors.initials: RC
authors.lastname: Eagle
authors.forename: E P
authors.initials: EP
authors.lastname: Shakin
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D003430:Cross-Sectional Studies; D005260:Female; D005451:Fluorescein Angiography; D013700:Giant Cell Arteritis / Q000150:complications / Q000503:physiopathology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D015356:Retinal Artery Occlusion / Q000209:etiology / Q000503:physiopathology*; D012307:Risk Factors; D014792:Visual Acuity / Q000502:physiology*