Medical Dictionary

countershock

noun coun·ter·shock \ -ˌshäk \

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

Seen and Heard

What made you want to look up countershock? Please tell us where you read or heard it (including the quote, if possible).

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

WORD OF THE DAY

to speak evil of

Get Word of the Day daily email!

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!