Dictionary.com
definitions

dysrhythmia

[dis-rith -mee-uh]
noun
  1. a disturbance of rhythm, as of speech or of brain waves recorded by an electroencephalograph.

Origin of dysrhythmia

1905–10; < New Latin < Greek dys- dys- + rhythm(ós) rhythm + -ia -ia
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
dysrhythmia in Medicine

dysrhythmia

[dĭs-rĭð′mē-ə]
n.
  1. An abnormality in an otherwise normal rhythmic pattern.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.