Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

heart block

noun

Definition of heart block

  1. :  incoordination of the heartbeat in which the atria and ventricles beat independently and which is marked by decreased cardiac output




Medical Dictionary

heart block

noun

Medical Definition of heart block

  1. :  incoordination of the heartbeat in which the atria and ventricles beat independently due to defective transmission through the bundle of His and which is marked by decreased cardiac output often with cerebral ischemia




Learn More about heart block


Seen and Heard

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

WORD OF THE DAY

to proceed clumsily or ineffectually

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

lavender-fields-in-france

Which of these is a synonym of caesura?

torrent interruption megillah rebellion
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ