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Your doctor has recommended you undergo an electrophysiology study (EPS).

You might not have heard this medical term before now and may be feeling unsure about the nature of the procedure.

This information sheet will outline what the procedure involves and what risks are involved.

After you read this information sheet, you might still have questions. If you do, please contact the team at Heart HQ. We’re here to help.

What’s an EPS?

Your doctor may have mentioned to you that you have a problem with your heart rate, where your heart could be beating too fast, too slow or with an irregular rhythm.

An EPS will help your doctor confirm an arrhythmia diagnosis or learn more about a known arrhythmia.

How does it work?

The intravenous line (IV) will be placed into a vein in your arm. This is for the medical team to administer medication during or after your procedure. You will receive an injection of local anaesthetic before catheters (very fine tubes) will be put into the artery in your right groin. A sedative will also be given.

Pacing wires will be passed through the vein in your groin up into your heart. Your doctor will be able to see the wires using x-rays. The wires record electrical signals from your heart and displays them on a monitor. From this, your doctor will be able to assess what kind of abnormal heart beats you are experiencing.

Your doctor will devise the best course of treatment for you, which may involve:

prescription of medications
the insertion of a pacemaker or implantable cardiac defibrillator (ICD)
a radiofrequency ablation (RFA).

What kind of risks are associated with this procedure?

Any kind of procedure carries some element of risk, often very small and rare.

Your doctor has balanced the benefits and risks of carrying out the test against the benefits and risks of not proceeding. If your doctor has recommended this procedure, they believe there is benefit to you going ahead.

It’s important you understand the risks involved so you can make an informed decision.

Here are the most commonly reported risks and complications associated with a pacemaker installation.

Common risks and complications (more than 5% of cases)

Minor bruising at the puncture site

Uncommon risks and complications (1–5% of cases)

Major bruising or swelling at the groin puncture site
Blood clot in the lung
Blood clot in the leg (deep vein thrombosis or DVT) causing pain and swelling—in rare cases part of the clot may break off and go to the lungs
Death is possible due to this procedure

Rare risks and complications (less than 1% of cases)

Heart block—this may require a pacemaker
Heart perforation—which may require drainage or surgery to repair

Electrophysiology study info sheet

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Electrophysiology study

Your doctor may have mentioned to you that you have a problem with your heart rate, where your heart could be beating too fast, too slow or with an irregular rhythm. An EPS will help your doctor confirm an arrhythmia diagnosis or learn more about a known arrhythmia.

What’s an EPS?

How does it work?

What kind of risks are associated with this procedure?

We're here to help.