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Coarctation of the aorta. A risk factor in children for the development of arteriosclerosis
Insights
Coarctation of the aorta leads to rising blood pressure and arteriosclerosis, particularly in older patients. This study investigates the link between aortic coarctation and the development of arteriosclerosis.
Area of Science:
- Cardiovascular Medicine
- Pediatric Cardiology
- Vascular Biology
Background:
- Coarctation of the aorta is a congenital heart defect characterized by aortic narrowing.
- Arteriosclerosis is a significant complication in patients with long-standing coarctation.
- The relationship between coarctation, hypertension, and arteriosclerosis requires further elucidation.
Purpose of the Study:
- To investigate the correlation between coarctation of the aorta and the development of arteriosclerosis.
- To analyze pressure changes and morphological alterations in the aorta in relation to patient age.
- To explore potential mechanisms contributing to arteriosclerosis in coarctation patients.
Main Methods:
- Analysis of pressure recordings in 120 patients (0-35 years) undergoing surgery for coarctation of the aorta.
- Evaluation of morphological, microscopic, and ultrastructural changes in the aorta.
- Assessment of aortic mineralisation and its distribution.
Main Results:
- A slow, steady rise in systolic and diastolic peak pressures observed, peaking in the 16-18 year age group.
- Significant arteriosclerotic changes in the aorta, increasing with age.
- Proximal aortic mineralisation up to 10 times higher than distal, with predominantly arteriosclerotic microscopic and ultrastructural changes.
Conclusions:
- Hypertension associated with coarctation of the aorta is a key factor in arteriosclerosis pathogenesis.
- Arteriosclerosis development in low-pressure areas suggests additional contributing factors.
- Reduced aortic "windkessel" function and altered blood flow patterns may promote arteriosclerosis in coarctation.
Abstract:
Pressure recordings in 120 patients, aged 0-35 years, undergoing operation for coarctation of the aorta, show a slow but steady rise in both systolic and diastolic peak pressures, the highest peak registered being in patients aged 16-18 years. The finding of significant morphological changes in the aorta in this age group is the rule and these arteriosclerotic changes become more severe as the patients get older. In long-standing coarctation, the degree of mineralisation proximally is up to 10 times higher than distally. The microscopic and ultrastructural changes in the proximal segment are essentially arteriosclerotic. In conclusion, the role of coarctation of the aorta in the pathogenesis of arteriosclerosis is essentially that of hypertension, a most important risk factor of arteriosclerosis. Since arteriosclerosis also develops in the region of low blood pressure, other factors are operative. We suppose that the reduced pulse and volume pressures, which in turn diminish the "windkessel" function of the aorta may effect a change in the blood flow patterns to favour the development of arteriosclerosis.