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Published on: May 4, 2015
[Ultrastructure of terminal myocardial arteries in chronic ischemic heart disease]
Insights
This study reveals significant ultrastructural changes in coronary arteries and arterioles of patients with chronic coronary heart disease (CHD). These alterations impact vessel layers, affecting patency and tissue health.
Area of Science:
- Vascular Biology
- Pathology
- Cardiovascular Research
Context:
- Investigates terminal arteries and arterioles in patients undergoing aortocoronary bypass surgery.
- Focuses on individuals with stenosing atherosclerosis and a history of chronic coronary heart disease (CHD).
Purpose:
- To elucidate the ultrastructural changes in coronary arteries and arterioles associated with chronic CHD.
- To identify the cellular and structural modifications within the vessel walls.
Summary:
- Observed complex morphofunctional shifts affecting all layers of the vessel wall.
- Identified key cellular players including endotheliocytes, smooth muscle cells, and stromal cells.
- Noted fibroblastic proliferation contributing to vessel wall fibrosis.
Impact:
- Detected changes indicate impaired vessel patency and altered responsiveness.
- Findings suggest significant effects on microcirculation and tissue trophicity.
- Highlights the pathological remodeling in resistant coronary vessels.
Abstract:
The ultrastructure of the terminal arteries and arterioles was studied on biopsy samples obtained during aortocoronary bypass surgery in ten patients with stenosing atherosclerosis of the major coronary arteries and a history of chronic CHD. A complex of morphofunctional shifts was identified affecting all layers of the vessel wall and leading to readjustment of every coat. The major cellular populations directly involved included endotheliocytes, smooth muscle cells and stromal cells. Fibroblastic elements, penetrating by their processes up to the subendothelial zone stimulated total fibrosis of the vessel wall. The changes detected are indicative of the impaired patency and alterations in the responsiveness of resistant vessels which can considerably affect the microcirculation and trophicity of tissue.
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