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Mustard operation

n.
  1. Correction of abnormal blood circulation due to the transposed great arteries by creating an intra-arterial baffle that partitions the atrium and directs the pulmonary venous blood through the right ventricular opening and the systemic venous blood through the mitral valve into the left ventricle.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.