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

Origin: L. Usurpo, pp. -atus, to seise

(05 Mar 2000)

usual interstitial pneumonia of Liebow, usufruct, usurp < Prev | Next > ut, uta, UTC, uterectomy

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