Electrophysiology study

Published 01/23 2008 04:10PM

Updated 07/28 2010 01:48PM

Electrophysiology study: (EP) An invasive test to determine risk for cardiac arrhythmia. Catheter electrodes are inserted into the patient's heart via veins in the groin and activated to induce arrhythmia. If an arrhythmia occurs, the test is deemed positive and the patient is defibrillated to return to the heartbeat to normal. A positive result points to treatment with an implantable cardioverter defibrillator, anti-arrhythmia drugs, or ablation.

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