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Definition of: arrhythmia
(ə·rith′mē·ə, ə·rith′-) noun Pathol.
Irregularity of the heart or pulse. [<NL <Gk. arrhythmia lack of rhythm <a- without + rhythmos measure]
—ar·rhyth·mic (ə·rith′·mik, ə·rith′-) adjective
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