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heart rate alternans

 

Definition: Variations in heart rate found in normal patients and in those with sundry disease states. An alternans beat is defined as a beat preceded and followed by beats with a different cycle time. Sinus arrhythmia is a common form of heart rate alternans and often a result of vagal nerve influence on the heart rate.

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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.

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