Carotid stiffness is associated with retinal microvascular dysfunction-The Maastricht study

Area of Science:

• Ophthalmology
• Cardiology
• Endocrinology

Background:

• Arterial stiffening is a key cardiovascular risk factor.
• Diabetic retinopathy is a leading cause of blindness, preceded by subtle retinal microvascular changes.
• Early detection of microvascular dysfunction is crucial for preventing diabetic retinopathy.

Purpose of the Study:

• To investigate the association between arterial stiffness and retinal microvascular function.
• To determine if carotid or aortic stiffness predicts retinal microvascular changes.
• To explore these associations in individuals with and without type 2 diabetes.

Main Methods:

• Cross-sectional analysis of the Maastricht Study cohort (N=2434).
• Assessed carotid distensibility coefficient and carotid-femoral pulse wave velocity.
• Measured retinal microvascular diameters and flicker light-induced dilation.
• Used multivariable linear regression, adjusting for risk factors.

Main Results:

• No significant association between arterial stiffness measures and retinal microvascular diameters.
• Higher carotid distensibility (lower carotid stiffness) correlated with greater retinal arteriolar flicker light-induced dilation.
• This association was stronger in individuals with type 2 diabetes.
• Aortic stiffness (carotid-femoral pulse wave velocity) showed no significant association.

Conclusions:

• Carotid stiffness, but not aortic stiffness, is associated with impaired retinal microvascular function.
• This association is more pronounced in individuals with type 2 diabetes.
• Carotid stiffness may be an early indicator of retinal microvascular dysfunction in diabetes.