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Cardiac Arrhythmias: Difference between revisions
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→Triggered Activity
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===Triggered Activity=== | ===Triggered Activity=== | ||
Triggered activity is activity of a cell triggered by a preceding activation. Due to early or delayed afterdepolarizations the resting membrane depolarizes and, when reaching threshold potentials, activates the cell. This mechanism can repeat itself en thus self-perpetuate. | Triggered activity is activity of a cell triggered by a preceding activation. Due to early or delayed afterdepolarizations the resting membrane depolarizes and, when reaching threshold potentials, activates the cell. This mechanism can repeat itself en thus self-perpetuate. | ||
* In early afterdepolarizations depolarization occurs during the action potential (phase 2 and 3). | |||
* Delayed afterdepolarizations occur after the cell has recovered after completion of repolarization. | |||
==Disorders of Impulse Conduction== | ==Disorders of Impulse Conduction== | ||