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electromechanical dissociation

(ĭ-lĕk′trō-mə-kănĭ-kəl)
n.
  1. Persistence of electrical activity in the heart without an associated mechanical contraction; it is often a sign of cardiac rupture.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.