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Why does Monckeberg medial calcific sclerosis usually not block blood flow?
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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.
Monckeberg medial calcific sclerosis is a form of arteriosclerosis characterized by the deposition of calcium within the muscular middle layer (media) of arteries.1
It does not typically block blood flow because these calcifications occur within the arterial wall itself rather than encroaching upon the arterial lumenāthe internal space through which blood travels. Unlike atherosclerosis, which involves the buildup of fatty plaques that narrow the lumen and restrict circulation, Monckeberg medial calcific sclerosis does not decrease the size of the lumen. Consequently, it is generally not considered a clinically significant condition and does not typically lead to events such as heart attacks or strokes.1