Test / Diagnostic Procedure: Electrophysiological Study & Ablation

An electrophysiological study (EPS) is an invasive test performed to gather information on an abnormal heart rhythm (arrhythmia), usually a supraventricular tachycardia (SVT), to diagnose and treat arrhythmias.

To book offline, call our Heart Health centre directly on: 02036532005

Enquiries: bookings.hearthealth@onewelbeck.com

What is an electrophysiological study?

An EPS is a test that measures how well the heart's electrical signals are working. Additionally, your OneWelbeck consultant will attempt to induce your abnormal heart rhythm. The information gathered from the test helps your consultant cardiologist evaluate your abnormal heart rhythms to diagnose and treat arrhythmias.

Why might you need to have an electrophysiological study?

Your cardiologist will perform an EPS if you are experiencing particular arrhythmias, usually an SVT. The information provided by the study will help them identify:

  • The kind of arrhythmia you have
  • Why you are experiencing symptoms such as palpitation, dizziness or fainting
  • Where in your heart an abnormal rhythm starts
  • Which treatment will be most effective for you

Your consultant may have you undergo an EPS if you are symptomatic, usually with an SVT, following diagnosis of this and having performed initial cardiac investigations.

How should you prepare for an electrophysiological study?

You will have a consultation with your cardiologist before the study is done where they will talk you through the procedure, any risks, and how to prepare for the procedure.

They will tell you that you need to stop eating and drinking for 6 to 8 hours before the test, and you may also need to stop taking certain medications.

It is advised that you arrange to have someone bring you to your procedure appointment and take you home afterwards as you will not be able to drive for at least 24 hours.

Risks of an electrophysiological study

As with any procedure, there are some risks associated with having an electrophysiological study, but these are rare (less than 1%).

Possible risks associated with an electrophysiological study include:

  • Bleeding or bruising at the top of the leg where the sheaths are inserted
  • Blood clots resulting in a heart attack or stroke
  • Damage to the heart's own electrical system resulting in permanent pacemaker implantation.
  • Blood into the sac around the heart (pericardial effusion).

Recovering from an electrophysiological study

After the procedure, you will be taken to a recovery area and will be able to go home after a few hours of observation. 

You may feel tired after the treatment and a little sore where the sheaths were inserted, but this should subside within a few days. 

Some patients notice that they can feel their heart beating more strongly afterwards, or they may feel extra or missed beats. 

It is common to feel your heart beating more strongly after this procedure, or you may feel extra or missed beats. This is normal and will settle over time.

Your consultant will go through your results with you at the end and see how you are getting on  at a follow-up appointment.  

Book a consultation

Jul 2024


Currently selected day

Available consultations

Click any unavailable day to check availability with similar consultants


Health Insurance

This service or treatment is generally covered by most health insurance policies. You are responsible for checking your insurance policy cover, and you may need a referral letter. Check which insurance companies are covered.


Doctor Referral Only

You will generally need to get a referral letter from your NHS GP, Private GP, or other doctor to access this service or treatment. Find out more including how we can assist you


Self-Pay Available

This treatment is available for self-paying users. If you would like to see more information on pricing visit our pricing and payments page.


Consultation Required

For this treatment you will need to have a 1-to-1 consultation at OneWelbeck first. To book in with our team of expert clinicians or to find out more about the process contact the relevant centre team.

Electrophysiological Study & Ablation Specialists

Our Heart Health specialists at OneWelbeck in London are leaders in their field. They are equipped with the latest diagnostic medical technology at custom-built, day-case facilities to investigate any symptoms and ensure you receive the best available care.