countershock

noun

: 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

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Cite this Entry

“Countershock.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/countershock. Accessed 30 Mar. 2025.

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