coun·​ter·​shock -ˌshäk How to pronounce countershock (audio)
: 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 episodeJohn Maurice

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Cite this Entry

“Countershock.” Medical Dictionary, Merriam-Webster, Accessed 21 Apr. 2024.

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