title: Is activated factor VII associated with retinal vein occlusion?
abstract: OBJECTIVE
  To determine whether a newly identified thrombophilia factor, activated factor VII (FVIIa), is associated with retinal vein occlusion (RVO).
  
  
  METHODS
  54 consecutive cases with RVO seen between March and September 1999 were included in the study. 22 cases had central retinal vein occlusion (CRVO) and 32 had branch retinal vein occlusion (BRVO). Ophthalmoscopic examination with detailed medical history was followed by blood analyses for liver and renal functions, cholesterol, triglycerides, complete blood count, and coagulation factors including protein C activity, free protein S, antithrombin III, fibrinogen, and factor VIIa (FVIIa). Data were compared with those of the control group, composed of 19 cases under ophthalmological follow up for refractive errors, presbyopia, or senile cataract.
  
  
  RESULTS
  Hypertension was highly prevalent in cases with BRVO. Complete blood count, and liver and kidney function tests were within normal limits in the study group. Two cases had low protein C activity, and one had low free protein S. FVIIa levels were significantly higher in the RVO group than in the control group (p=0.0004). There was no significant difference in FVIIa levels between the CRVO and BRVO groups (p=0.51).
  
  
  CONCLUSIONS
  No haematological parameter except FVIIa differed significantly from that of the control group. Elevation of FVIIa level may play a part in the pathophysiology of both CRVO and BRVO.
authors.affiliation: Department of Ophthalmology, Hacettepe University School of Medicine, Turkey. sibelkd@mailcity.com
authors.forename: S
authors.initials: S
authors.lastname: Kadayifçilar
authors.forename: D
authors.initials: D
authors.lastname: Ozatli
authors.forename: O
authors.initials: O
authors.lastname: Ozcebe
authors.forename: E C
authors.initials: EC
authors.lastname: Sener
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000990:Antithrombin III / Q000032:analysis; D015415:Biomarkers / Q000097:blood; D016022:Case-Control Studies; D015942:Factor VIIa / Q000032:analysis*; D005260:Female; D005340:Fibrinogen / Q000032:analysis; D006801:Humans; D006973:Hypertension / Q000150:complications; D007677:Kidney Function Tests; D008111:Liver Function Tests; D008297:Male; D008875:Middle Aged; D011486:Protein C / Q000032:analysis; D017293:Protein S / Q000032:analysis; D012170:Retinal Vein Occlusion / Q000097:blood* / Q000209:etiology; D018709:Statistics, Nonparametric
chemical_list: D015415:Biomarkers; D011486:Protein C; D017293:Protein S; D000990:Antithrombin III; D005340:Fibrinogen; D015942:Factor VIIa