Found in the following dictionaries
OTCWL2014 (NASPA Word List 2014)
"Cardioversion" Definition
noun
The restoration of the heartbeat to normal functioning by the application of electrical shock or by the use of medication.
Source: American Heritage Dictionary
The treatment of cardiac arrhythmia, either with medication or by use of a machine (a cardioverter) that delivers a controlled electric current.
Source: Wiktionary
Application of an electric shock in order to restore normal heartbeat.
Source: Merriam-Webster
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