Activated protein C resistance in patients with central retinal vein occlusion.
AIM/BACKGROUND: A new defect in the anticoagulant system has recently been discovered--activated protein C resistance. The frequency of this disorder has been shown to be increased in young patients (< 50 years of age) with central retinal vein occlusion. This study was carried out to determine if there was any overrepresentation of activated protein C resistance in patients > 50 years of age with central retinal vein occlusion. METHODS: Blood samples were obtained from 83 patients > 50 years of age and with a history of central retinal vein occlusion. The blood samples were analysed for activated protein C resistance with standard clinical laboratory methods. RESULTS: In this material 11% of the patients were resistant to activated protein C. The normal incidence of activated protein C resistance in the same geographical area is 10-11%. CONCLUSION: Activated protein C resistance does not seem to be a cause of central retinal vein occlusion in people older than 50 years.[1]References
- Activated protein C resistance in patients with central retinal vein occlusion. Larsson, J., Sellman, A., Bauer, B. The British journal of ophthalmology. (1997) [Pubmed]
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