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Eck fistula

(ĕk)
n.
  1. An anastomosis created between the vena cava and the portal vein in order to divert the flow of blood from the intestinal system away from the liver and directly to the heart.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.