Definition of "arrhythmia" []

• An irregularity in the force or rhythm of the heartbeat. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• ""The term arrhythmia refers to any change from the normal sequence of electrical impulses, causing abnormal heart rhythms."
• "(An arrhythmia is an irregular heart beat caused by a problem with the heart's built-in electrical system.)"
• "Multaq was approved for short-term arrhythmia lasting less than six months."