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hemisystole in Medicine

hemisystole

(hĕm′ĭ-sĭstə-lē)
n.
  1. Contraction of the left ventricle following every second atrial contraction, producing one pulse to every two heartbeats.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.