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How do high blood pressure and atherosclerosis reinforce each other?
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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.
High blood pressure and atherosclerosis are mutually reinforcing conditions that significantly impact cardiovascular health. Their relationship functions as a cycle of damage and progression:1
- Hypertension promotes atherosclerosis: High blood pressure exerts mechanical stress on the endothelium, the inner lining of the arteries. This injury makes the vessel walls more susceptible to the accumulation of cholesterol, fats, and other debris, which encourages the formation of atherosclerotic plaques.123
- Atherosclerosis aggravates hypertension: As these plaques grow, they cause the arterial walls to thicken and lose their natural elasticity. This stiffening of the vessels increases resistance to blood flow, which in turn causes blood pressure to rise further.321
Once this cycle is established, the progression of one condition typically worsens the other, increasing the risk of serious complications such as coronary heart disease, stroke, and congestive heart failure. Treating hypertension is essential, as it can help slow this destructive process and reduce the incidence of these severe cardiovascular events.41