Intracardiac electrophysiology study (EPS)

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Conduction system of the heart

Heart, front view

Electrophysiology study - intracardiac; EPS - intracardiac

The exact location and type of the arrhythmia must be determined so that specific therapy can be applied appropriately. The arrhythmia may originate from any area of the heart's electrical conduction system.

For example:

• Sick sinus syndrome occurs when the SA node of the heart malfunctions.
• Wolff-Parkinson-White syndrome happens when there is an extra electrical pathway, causing the signal to avoid the normal path through the AV node.
• Ventricular fibrillation and ventricular tachycardia can occur when muscle cells in the ventricles inappropriately take over the electrical activity of the heart.

Review Date: 11/06/2006
Reviewed By: Glenn Gandelman, MD, MPH, Assistant Clinical Professor of Medicine, New York Medical College, Valhalla, NY. Review provided by VeriMed Healthcare Network.