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dysrhythmia
dys·rhyth·mi·a [ dis rímee ə ]


noun 
Definition:
 
irregular heart or brain rhythm: an irregularity in a rhythm, especially of heartbeats or brain waves
[Early 20th century. < modern Latin, "bad rhythm" < Greek rhuthmos "rhythm"]
Encarta® World English Dictionary [North American Edition] © & (P)2007 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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