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vasoconstriction
vasoconstrictor
vasodilation
vasodilator
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vasospasm
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vasospasm
va·so·spasm [ váyzō spàzzəm ]


noun 
Definition:
 
spasm of blood vessel: sustained contraction of the muscular walls of the blood vessels with a resultant reduction in blood flow. In Raynaud's disease there is vasospasm of the arteries of the fingers, which causes cold or numb fingers.

va·so·spas·tic [ vàyzō spástik ] adjective
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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