Dictionary.com

arrhythmia

[ uh-rith-mee-uh, ey-rith- ]
/ əˈrɪð mi ə, eɪˈrɪð- /
Save This Word!

noun Pathology.
any disturbance in the rhythm of the heartbeat.

COMPARE MEANINGS

Click for a side-by-side comparison of meanings. Use the word comparison feature to learn the differences between similar and commonly confused words.
QUIZ
WILL YOU SAIL OR STUMBLE ON THESE GRAMMAR QUESTIONS?
Smoothly step over to these common grammar mistakes that trip many people up. Good luck!
Question 1 of 7
Fill in the blank: I can’t figure out _____ gave me this gift.
Also arhythmia.

Origin of arrhythmia

1885–90; <New Latin <Greek arrhythmía.See a-6, rhythm, -ia

OTHER WORDS FROM arrhythmia

arrhyth·mic [uh-rith-mik, ey-rith-], /əˈrɪð mɪk, eɪˈrɪð-/, ar·rhyth·mi·cal, adjectivear·rhyth·mi·cal·ly, adverb

WORDS THAT MAY BE CONFUSED WITH arrhythmia

arrhythmic , eurhythmic
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use arrhythmia in a sentence

British Dictionary definitions for arrhythmia

arrhythmia
/ (əˈrɪðmɪə) /

noun
any variation from the normal rhythm in the heartbeat

Word Origin for arrhythmia

C19: New Latin, from Greek arrhuthmia, from a- 1 + rhuthmos rhythm
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for arrhythmia

arrhythmia
[ ə-rĭðmē-ə ]

An abnormal rhythm of the heart, often detectable on an electrocardiogram. Electrical impulses in the heart normally originate in the sinoatrial node of the right atrium during diastole and are transmitted through the atrioventricular node to the ventricles, causing the muscle contraction that usually occurs during systole. However, abnormalities of electrical conduction during diastole or systole can result in various alterations of the heartbeat, such as changes in heart rate, skipped or irregular beats, and fibrillation of the heart muscle, which can be life threatening. These electrical disturbances can be caused by metabolic abnormalities, inadequate blood supply (as in coronary artery disease), drug effects, chronic disease, and other factors. Arrhythmias are sometimes treated with the implantation of a pacemaker.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
FEEDBACK