#arterial constriction

• Angiospasm — A sudden, temporary, and involuntary constriction of the smooth muscle fibers within a blood vessel wall, leading to a marked narrowing of the vascular lumen and a transient reduction in circulatory flow. This well-defined pathological structural phenomenon can affect the coronary arteries (causing Prinzmetal's angina), cerebral arteries, or peripheral vessels of the extremities, clinically manifesting as acute episodes of ischemic pain, localized pallor, and paresthesias.
• Angiospastic — Relating to angiospasm, belonging to it, or characterized by a marked tendency toward sudden, involuntary, and painful contraction of the smooth muscle within arterial walls. In a clinical and structural context, this descriptor defines crises, ischemic episodes, or well-defined vascular syndromes (such as Raynaud's disease) dominated by a transient spastic narrowing of the circulatory lumen under the influence of neurovegetative or thermal stimuli.