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Why are diabetes and high blood pressure linked to arteriolosclerosis?
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cardiovascular disease
This micrograph shows a cross section of a coronary artery narrowed by an atherosclerotic plaque (purplish matter inside the artery). Most heart attacks are caused by the rupture of an atherosclerotic plaque, which triggers the formation of a clot that abruptly blocks blood flow to part of the heart muscle.
Arteriolosclerosis is a condition characterized by the thickening of the walls of small arteries and arterioles, which narrows the vessel lumen and can lead to ischemia. While it is a normal part of aging, it is most frequently observed in individuals with diabetes mellitus or high blood pressure.1
The link between these conditions and arteriolosclerosis involves the following mechanisms:
- High Blood Pressure: Persistent hypertension places mechanical stress on the vascular system. In the kidneys, this leads to nephrosclerosis, where the inner layers of small vessel walls thicken and eventually harden, potentially closing the central channel of the vessel.2
- Diabetes Mellitus: Diabetes is associated with small-artery disease, or microangiopathy, which involves the thickening of the walls of small arteries and capillaries. These structural changes render the vessels prone to obstruction and are often aggravated by coexisting hypertension and high serum levels of lipids.3
Both conditions contribute to a cycle of vascular damage that compromises blood flow to vital organs.13