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.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.