a premature contraction of the heart, resulting in momentary interruption of the normal heartbeat.
- Also called premature beat, premature contraction.
- ex·tra·sys·tol·ic [ek-struh-sis-tol-ik], /ˌɛk strə sɪsˈtɒl ɪk/, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use extrasystole in a sentence
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.
If there is auricular extrasystole it can not usually be recognized except by graphic methods.
Whenever there is a dropped beat or an intermittent pulse one may be sure that it is the result of an extrasystole.
The ventricular extrasystole on the contrary is commonly seen and readily recognized.