countershock

noun
coun·​ter·​shock | \ -ˌshäk How to pronounce countershock (audio) \

Medical Definition of countershock

: a therapeutic shock of electricity applied to a heart for the purpose of altering a disturbed rhythm (as in chronic atrial fibrillation) delivering a life-saving countershock within seconds of an arrhythmic episode— John Maurice

Learn More About countershock

Cite this Entry

“Countershock.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/countershock. Accessed 22 Jun. 2021.

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