extrasystole

extrasystole definition - medical

ex·tra·sys·to·le (ĕkˌstrə-sĭsˈtə-lē)

noun
An ectopic, usually premature contraction of one of the chambers of the heart, resulting in momentary cardiac arrhythmia. Also called premature systole.

The American Heritage® Medical Dictionary Copyright © 2009 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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