What is an Electrophysiology Study?

An electrophysiology study involves several tests performed in a special lab in the hospital that can take several hours. These tests help pinpoint the location, the type of arrhythmia, and how the arrhythmia responds to treatment.

During an EP study, the patient is sedated and small catheters are guided to the heart. The heart’s rhythm is recorded as small amounts of electricity are delivered through the catheter. This internal recording is often compared with an external recording (from electrodes placed on the patient’s chest and back) taken at the same time.

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