What is electrophysiology (EP) testing?
The electrophysiology study, also called an EP study, is a test that records the electrical activity and measures the electrical pathways of your heart. During EP testing, electrode catheters (flexible, insulated wires with metal electrode tips) are inserted into the heart in order to study the cardiac electrical system. This test is used to determine the cause of heart rhythm disturbance, and to help the provider develop a treatment plan for that arrhythmia.