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Meaning of extrasystole

ex•tra•sys•to•le

Pronunciation: (ek"stru-sis'tu-lē), [key]
— n. Pathol.
  1. a premature contraction of the heart, resulting in momentary interruption of the normal heartbeat. Also called
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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