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Carotid adventitial vasa vasorum and intima-media thickness in a primary prevention population
Uchechukwu K A Sampson1, Frank E Harrell, Sergio Fazio
1Department of Medicine, Vanderbilt University Medical Center (VUMC), Nashville, Tennessee; Department of Pathology, Microbiology and Immunology, VUMC, Nashville, Tennessee; Department of Radiology and Radiological Sciences, VUMC, Nashville, Tennessee.
Insights
Vasa vasorum ratio and intima-media thickness are independently linked to diabetes, but not directly related to each other in this primary prevention cohort. Further research is needed to clarify their complex relationship in atherosclerosis.
Area of Science:
- Cardiovascular Research
- Vascular Biology
- Atherosclerosis Research
Background:
- Vasa vasorum (VV) are implicated in atherosclerosis development.
- Assessing carotid VV, intima-media thickness (CIMT), and risk factors is crucial for primary prevention.
- This study investigates these markers in a primary prevention population.
Purpose of the Study:
- To evaluate the relationship between carotid vasa vasorum (VV) ratio, intima-media thickness (CIMT), and patient risk factors.
- To assess these markers in a primary prevention population, including diabetics and non-diabetics.
Main Methods:
- Utilized multivariable linear models to analyze associations.
- Evaluated baseline covariates, carotid VV ratio, and CIMT.
- Included 324 diabetic and 141 non-diabetic participants.
Main Results:
- Diabetes was significantly associated with higher VV ratio (36%) and CIMT (31%).
- Increased age and systolic blood pressure correlated with higher CIMT.
- Female sex was associated with lower CIMT; BMI correlated with VV ratio.
Conclusions:
- VV ratio and CIMT were independently associated with diabetes but not directly related to each other.
- These findings highlight diabetes as a key factor influencing both VV ratio and CIMT.
- Further large-scale studies are warranted to explore the VV ratio-CIMT relationship across various atherosclerotic states.
Background:
Vasa vasorum (VV) vessels are critical in the genesis of atherosclerosis. Therefore, we assessed measures of carotid VV, intima-media thickness (CIMT), and patient risk factors in a primary prevention population.
Methods:
We used multivariable linear models to evaluate the relationship between baseline covariates and a measure of carotid VV (VV ratio) and CIMT among 324 diabetics and 141 nondiabetics.
Results:
Median CIMT (in mm) and VV ratio among nondiabetics were 0.82 ± 0.22 and 0.80 ± 0.19, respectively, and 1.06 ± 0.19 and 1.21 ± 0.26 among diabetics (P < 0.0001). Diabetes was associated with 36% (95% CI: 24.3-48.0, P < 0.001) higher VV ratio whereas a unit change in BMI was associated with ≈1% (95% CI: 0.5-1.4, P < 0.001) change in VV ratio. A 10-year increase in age was associated with 4% (95% CI: 1-7, P = 0.005) higher CIMT. Each 10 mmHg increase in mean systolic blood pressure was associated with 2% (95% CI: 1-4, P = 0.003) higher CIMT whereas diabetes conferred 31% (95% CI: 19.1-42.1, P < 0.001) higher CIMT. Female sex was associated with a 9% (95% CI: -12.9 to -4.1, P < 0.001) lower CIMT. Low density lipoprotein (LDL) cholesterol, blood pressure, and CIMT were not significantly associated with VV ratio.
Conclusion:
In this cohort of patients with low CIMT, VV ratio, and CIMT were distinctly unrelated, but each independently associated with diabetes. VV ratio and CIMT relationships warrant further investigation in large-scale studies and across a spectrum of atherosclerostic states.
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