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Pathophysiology and pathogenesis of aortic aneurysms. Current concepts.
1Department of Surgery, Loyola University Medical Center, Maywood, Illinois.
The Surgical Clinics of North America
|August 1, 1989
Summary
Arterial aneurysms result from material failure due to excessive load and weakened vessel walls. Atherosclerosis may exacerbate this by increasing pressure and reducing the aorta's load-bearing capacity, with a genetic component influencing structural failure versus occlusive lesions.
Area of Science:
- Biomedical Engineering
- Cardiovascular Science
- Pathology
Background:
- Arterial aneurysm development is viewed as a material failure problem.
- This failure can stem from excessive applied load or inadequate material strength.
- Atherosclerosis is a key factor in arterial wall compromise.
Purpose of the Study:
- To present a hypothesis on how atherosclerosis impacts arterial load-bearing capacity.
- To explore the dual role of atherosclerosis in increasing pressure load and decreasing wall strength.
- To identify the genetic factors differentiating structural failure from occlusive lesions in atherosclerotic aortas.
Main Methods:
- Hypothetical modeling of arterial biomechanics.
- Analysis of atherosclerosis's effects on vascular pressure and material properties.
- Review of genetic predispositions in aortic aneurysm and occlusive disease.
Main Results:
- Atherosclerosis is hypothesized to increase pressure load on arteries.
- Atherosclerosis is also hypothesized to decrease the arterial wall's capacity to withstand load.
- Genetic traits are proposed to determine whether atherosclerotic aortas fail structurally or develop occlusive lesions.
Conclusions:
- Atherosclerosis presents a dual threat to arterial integrity, increasing load and reducing strength.
- Understanding the genetic basis for differential aortic response to atherosclerosis is crucial.
- Further research is needed to elucidate specific genetic factors influencing aneurysm formation versus occlusion.