Abnormal narrowing of an artery, restricting blood flow.
From arterio- (artery) + stenosis (narrowing, from Greek stenos narrow). Describes pathological arterial narrowing. Combines Greek roots for artery and constriction.
Arteriostenosis is like a pinched hose—as the artery narrows from plaque, scar tissue, or clots, blood flow becomes more and more restricted until tissues downstream start suffocating for oxygen.
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