Idioventricular rhythm is usually a result of usurpation.

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Idioventricular rhythm refers to a slower-than-normal heart rhythm originating from the ventricles themselves, rather than from the normal pacemaker in the atria. Usurpation, on the other hand, refers to the takeover of pacemaker function by a lower pacemaker site, such as the AV node or ventricle. Usurpation can result in an idioventricular rhythm, but it is not the usual cause. Typically, idioventricular rhythms occur in situations where the normal pacemaker is suppressed or damaged, such as during a heart attack or drug overdose.

Idioventricular Rhythm Is Usually a Result of Usurpation