Retinal vessel diameter and cardiovascular mortality: pooled data analysis from two older populations

Area of Science:

• Ophthalmology
• Cardiovascular Science
• Neurology

Background:

• The retinal microvasculature can serve as a non-invasive indicator of systemic microvascular health.
• Pre-clinical changes in retinal vessels may precede clinical manifestations of coronary heart disease (CHD) and stroke.

Purpose of the Study:

• To investigate the association between retinal arteriolar and venular diameters and mortality from CHD and stroke.
• To determine if specific retinal vessel characteristics predict cardiovascular and cerebrovascular disease risk.

Main Methods:

• Pooled data from the Beaver Dam Eye Study and Blue Mountains Eye Study (n=7494).
• Retinal vessel diameters measured from digitized retinal photographs.
• Change point models used to identify threshold effects; smaller arterioles and larger venules defined based on quintiles.

Main Results:

• Smaller arterioles and larger venules were associated with increased risk of CHD-mortality (HR 1.34 and 1.24, respectively).
• These associations were more pronounced in middle-aged individuals (43-69 years).
• Smaller arterioles and larger venules also showed an increased risk of stroke-mortality in the same age group.

Conclusions:

• Retinal vessel diameter, specifically smaller arterioles and larger venules, may predict the risk of CHD and stroke mortality.
• These findings suggest retinal microvasculature assessment could be a valuable tool for cardiovascular and cerebrovascular risk stratification in middle-aged populations.