arteriovenous fistula


n.

An abnormal communication between an artery and a vein, usually resulting in the formation of an arteriovenous aneurysm.

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This tall, horizontally branched cactus is probably the most recognizable cactus in Arizona. What is it called?
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.