- a premature contraction of the heart, resulting in momentary interruption of the normal heartbeat.
Origin of extrasystole
Also called premature beat, premature contraction.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for extrasystole
The extrasystole may have its origin in either the auricle or the ventricle.
Provided there is no evidence of gross myocardial lesion, the extrasystole itself is of no great significance.
Whenever there is a dropped beat or an intermittent pulse one may be sure that it is the result of an extrasystole.
- An ectopic, usually premature contraction of one of the chambers of the heart, resulting in momentary cardiac arrhythmia.premature systole
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.