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Diabetic Retinopathy

Diabetic Retinopathy

DefinitionDiabetic retinopathy is a microvascular complication of diabetes affecting the retinal blood vessels.Risk FactorsDiabetic retinopathy is present in almost all individuals with type 1 diabetes and more than 60% of those with type 2 diabetes after two decades of disease.The risk increases with poor glycemic control, hypertension, dyslipidemia, smoking, pregnancy, and puberty.Although cataracts and glaucoma are also more frequent in people with diabetes, retinopathy remains the leading...

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Retinal microvascular abnormalities and stroke: a systematic review.

F N Doubal¹, P E Hokke, J M Wardlaw

¹Division of Clinical Neurosciences, University of Edinburgh, Bramwell Dott Building, Western General Hospital, Edinburgh EH4 2XU, UK. fergus.doubal@ed.ac.uk

Journal of Neurology, Neurosurgery, and Psychiatry

|October 22, 2008

Summary

Retinal microvascular abnormalities are linked to an increased risk of stroke. Further research is needed to understand specific retinal conditions and stroke subtypes, aiding lacunar stroke etiology clarification.

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Area of Science:

Ophthalmology
Neurology
Vascular Medicine

Background:

Lacunar strokes constitute 25% of ischemic strokes, yet their cause remains unclear.
Cerebral and retinal small vessels share similarities, suggesting retinal microvascular changes may offer insights into stroke etiology.

Purpose of the Study:

To systematically review the association between retinal microvascular abnormalities and stroke.
To explore potential links between specific retinal abnormalities and stroke subtypes.

Main Methods:

A systematic literature review of Medline and Embase databases up to October 2007.
Inclusion of 22 studies with 62,975 participants, analyzing associations between retinal abnormalities and prevalent/incident stroke.
Extraction of summary risk ratios (sRR) for identified associations, with adjustments for key variables.

Main Results:

Retinopathy showed a significant association with both incident (sRR 2.1) and prevalent stroke (sRR 2.5).
Retinal artery embolism (sRR 2.9) and venular widening (sRR 1.4) were also linked to incident stroke.
Significant heterogeneity existed between studies; no data were available for hemorrhagic vs. ischemic stroke subtypes.

Conclusions:

Retinal microvascular abnormalities are associated with an increased risk of stroke.
More research is necessary to define specific retinal abnormality-stroke subtype associations.
Future studies should prioritize accurate diagnosis and subtyping of ischemic stroke.