Electrophysiology (EP) Study

What is an EP study?

A cardiac electrophysiology (EP) study is a test that is used to check if your heart's electrical system is working properly, and find out why if it is not.

Your heart’s electrical system coordinates your heart’s contractions to allow blood to flow normally and create a regular heartbeat or rhythm. This natural rhythm may be affected by many factors, leading to irregular heartbeat (arrhythmia). These factors include:

To perform an EP study, thin electrodes are inserted into a vein and guided to your heart to measure its electrical signals. Your doctor may also use the electrodes to stimulate an abnormal heart rhythm and identify its cause. This information will help to determine an appropriate form of treatment.

Why do you need an EP study?

An electrophysiology (EP) study may be recommended to:

  • Check for abnormal electrical signals that may be causing irregular heartbeats.
  • Identify the source of an irregular heartbeat (arrhythmia).
  • Investigate the cause of symptoms such as dizziness, fainting, weakness, or palpitations.
  • Investigate your risk for cardiac arrest.
  • Assess treatment options, which may include catheter ablation, a pacemaker or an implantable cardioverter defibrillator.
  • Evaluate if a prescribed treatment is working.

Who should not undergo an EP study?

An EP study may not be recommended if you:

  • Are pregnant
  • Have problems lying still on your back for an extended period of time

Your doctor will advise if an EP study is the right procedure for you.

What are the risks and complications of an EP study?

An EP study may involve the following risks and complications:

  • Bleeding, bruising or infection where the catheter is inserted into a vein.
  • Blood clots at the end of the catheter(s), which may break off and block a blood vessel. To prevent this, your doctor may give you medicine.

Rarely, infection or damage to the heart or its electrical system may occur.

Note: As any current health condition may affect your risk, be sure to discuss your medical history and any concerns beforehand.

Why choose Parkway East Hospital?

When it comes to heart health, Parkway East Hospital is the preferred private hospital for residents on the eastern coast of Singapore.

Our experienced team of cardiologists has a track record in delivering good clinical outcomes for our heart patients.

Our cardiologists and neurologists

At Parkway East Hospital, our specialists are committed to delivering quality care and effective treatment.

Our skilled team of heart specialists will work together with neurologists to guide you through heart procedures and treatments, including EP studies.

This page has been reviewed by our medical content reviewers.

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