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Coronary intimal thickenings and lipids in Finnish children who died violently
Insights
Early intimal thickenings in coronary arteries were observed in 53% of children under 5 who died violently. These changes, including internal elastic lamina splitting and smooth muscle cell increase, may precede future coronary artery disease.
Area of Science:
- Cardiovascular pathology
- Pediatric pathology
- Arterial disease research
Background:
- Intimal thickening is a key feature in the development of atherosclerotic lesions.
- Early detection of cardiovascular changes in children is crucial for understanding long-term disease progression.
- Violent death provides an opportunity to study coronary artery health in otherwise healthy pediatric populations.
Purpose of the Study:
- To investigate the presence and characteristics of intimal thickenings in the coronary arteries of children.
- To determine the incidence of these early arterial changes in a pediatric cohort.
- To explore the potential link between childhood intimal thickenings and the development of coronary atheromas.
Main Methods:
- Post-mortem examination of coronary arteries from children who died violently.
- Histological analysis to identify intimal thickening, splitting of the internal elastic lamina, and smooth muscle cell proliferation.
- Biochemical analysis of cholesterol ester composition to infer origin.
Main Results:
- Intimal thickenings were found in 53% of 75 healthy children, including those under 5 years old.
- Splitting of the internal elastic lamina and increased smooth muscle cells were primary findings.
- Esterified cholesterol accumulation, likely from blood, was observed before age 10.
Conclusions:
- Early intimal thickenings are prevalent in children, even in the very young.
- These findings suggest that the precursors of coronary atheromas may originate in childhood.
- Further research is needed to confirm if these thickenings lead to adult coronary artery disease.
Abstract:
Intimal thickenings of the coronary arteries were found in healthy children who died violently, of both sexes even in children under 5 years of age. The average incidence was 53 % of the 75 cases. Splitting of the internal elastic lamina was the primary finding, followed by local increase in smooth muscle cells. The thickening could occupy 50 % of the coronary lumen. The accumulation of esterified cholesterol in the coronary arteries began before the age of 10 years. The fatty acid composition of the cholesterol esters suggests that they are derived from the blood. The question whether the thickenings are precursors of forthcoming coronary atheromas needs further detailed studies, especially in young adults.