extrasystole

noun

ex·​tra·​sys·​to·​le ˌek-strə-ˈsi-stə-(ˌ)lē How to pronounce extrasystole (audio)
: a premature beat of one of the chambers of the heart that leads to momentary arrhythmia

Word History

Etymology

New Latin

First Known Use

circa 1900, in the meaning defined above

Time Traveler
The first known use of extrasystole was circa 1900

Dictionary Entries Near extrasystole

Cite this Entry

“Extrasystole.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/extrasystole. Accessed 28 Mar. 2024.

Medical Definition

extrasystole

noun
ex·​tra·​sys·​to·​le -ˈsis-tə-(ˌ)lē How to pronounce extrasystole (audio)
: a prematurely occurring beat of one of the chambers of the heart that leads to momentary arrhythmia but leaves the fundamental rhythm unchanged

called also premature beat

extrasystolic adjective
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