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Updated: Aug 20, 2026

A Methodological Approach to Non-invasive Assessments of Vascular Function and Morphology
Published on: February 7, 2015
[Diminished vascular density in the aortic wall. Morphological and functional characteristics of atherosclerosis]
Cuauhtémoc Acoltzin Vidal1, Irma Maldonado Villaseñor, Leonardo Rodríguez Cisneros
1Centro de Investigaciones Biomédicas, Universidad de Colima. jose_rafael_c_acoltzin@yahoo.com
Insights
Vascular density is significantly lower in atherosclerotic aortic walls compared to healthy aorta. This reduced vascularity may initiate the pathological process of atherosclerosis.
Area of Science:
- Cardiovascular Biology
- Atherosclerosis Research
- Vascular Histology
Context:
- Atherosclerosis is characterized by irregular arterial wall changes.
- The role of vasa vasorum in atherosclerosis is not fully understood.
- Human aortic wall structure and vascularization vary across disease states.
Purpose:
- To quantify differences in vascular wall and vasa vasorum thickness.
- To analyze vascular density in healthy versus atherosclerotic human aorta.
- To investigate the relationship between atherosclerosis and vascular supply.
Summary:
- Significant differences in intima and media thickness were observed between healthy and diseased aortic walls.
- Vascular density was markedly higher in healthy aortic fragments compared to diseased areas.
- A stronger correlation between vessel number and vascular segment length was found in healthy aorta.
Impact:
- Findings suggest reduced vascular density in atherosclerotic aorta may initiate the disease.
- This study provides quantitative histological data on aortic wall changes in atherosclerosis.
- Highlights the importance of vasa vasorum in maintaining aortic health.
Purpose:
To determine disproportion in thicknesses of the vascular wall and vasa vasorum in eight fragments of human aorta because of the irregular distribution of atherosclerosis in arterial walls.
Method:
The length and thickness of the wall and its layers were measured and the vasa vasorum were conted. Vascular density, considered as the number of vessels per square millimeter in healthy and diseased areas, was calculated along with mean value, variance, standard deviation and the confidence interval for values and null hypotesis. Variances were analyzed, and the comparative and paired "t" test was applied.
Results:
There were differences in thicknesses of the healthy (27 :m) and diseased (120.5 :m) intima (p < 0.001) and between the healthy (125.2 :m) and diseased (102.3 :m) media (P < 0.001). Vascular density was higher in healthy fragments (mean +/- Cl 99% = 4.40 +/- 1.4 vs 2.20 +/- 0.8, = < 0.001 for Ha; 0 +/- 1.0775 for Ho; paired "t" 2.1 +/- 1.1, P < 0.01), and higher compared to the healthy intima area (31.6 vs 5.1, P < 0.01). There were no differences compared to the media layer area. The relation between the number of vessels and the length of the vascular segments was greater in the healthy fragments (mean +/- Cl 95% = 4.9 +/- 1.02 vs 3.5 +/- 0.68; 1.4 difference, P < 0.05).
Conclusion:
Vascular density is lower in the atherosclerotic aortic wall than in the healthy aorta and this could initiate the pathologic process.
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