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Medical Term:

usurpation

Pronunciation: yu'sur-pa'shun

Definition: Assumption of pacemaker function of the heart by a subsidiary focus as a result of its own increased automaticity; accelerated junctional pacemaker takes command when it exceeds the sinus rate.

[L. usurpo, pp. -atus, to seize]

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