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Electrophysiology Study

What is an Electrophysiology study?

An electrophysiology (EP) study is a procedure in which thin, flexible wires are passed through a vein in the groin and guided into the heart. These wires can both record the heart's electrical signals and deliver small, carefully controlled electrical pulses. This allows Dr. Kaba to provoke and map the arrhythmia - finding out exactly how the heart's electrical system is behaving and where any problems are coming from.

It is a diagnostic procedure, but in many cases treatment - such as catheter ablation - can be carried out in the same session if the source of the arrhythmia is clearly identified.

A male physician in blue scrubs and a grey blazer sits at a consultation desk, holding a pen over paperwork and smiling at a patient opposite him in a clinical setting.

Why is an EP study done?

An EP study may be recommended if you have:

  • Unexplained palpitations that have not been fully explained by non-invasive tests such as a Holter monitor or an event recorder
  • Episodes of blackouts (syncope) thought to be caused by a heart rhythm problem
  • A known arrhythmia where more detailed information is needed before deciding on treatment
  • A need to assess the heart's electrical conduction system, for example before pacemaker decisions
  • Symptoms suggesting an accessory pathway - an extra electrical connection in the heart that can cause fast heart rhythms

The relationship between an EP study and catheter ablation

An EP study and a catheter ablation are closely related. In many patients, if the EP study identifies the source of the arrhythmia clearly, Dr. Kaba will proceed to ablation - treating the problem - in the same procedure, without needing a second visit.

This means that in practice, an EP study appointment often becomes a combined diagnostic and treatment session. Dr. Kaba will discuss this possibility with you beforehand so you know what to expect and can give your consent in advance.

How to Prepare

  • Fasting: You will need to avoid eating or drinking for at least six hours before the procedure.
  • Medications: Some anti-arrhythmic medications may need to be stopped several days before the study, as they can mask the arrhythmia and make it harder to provoke. Dr. Kaba will give you clear, written instructions on which medications to take and which to pause.
  • Blood thinners: Guidance on blood thinners will depend on your individual situation and any planned ablation. Dr. Kaba's team will advise you.
  • Escort: You will need someone to take you home after the procedure.

What happens during the procedure

1

An EP study is performed in a specialist cardiac catheter laboratory under local anaesthetic with sedation, or in some cases under general anaesthetic. You will be comfortable throughout.

2

After cleansing the skin at the top of the leg, Dr. Kaba passes thin wires through the femoral vein in the groin and guides them carefully into different parts of the heart using real-time X-ray imaging.

3

Once the wires are in position, a series of recordings is made to measure the heart's electrical activity at rest and in response to gentle electrical stimulation

4

If an arrhythmia is provoked and identified, Dr. Kaba will interpret the findings in real time. If ablation is to follow, the mapping and treatment process begins at this point.

5

The procedure typically takes one to three hours, depending on what is found and what treatment is needed.

A male physician in blue scrubs and a grey blazer sits attentively in a clinical consultation room, listening to a patient. Medical equipment and hygiene dispensers are visible on the wall behind him.

What we find and what comes next

The results of an EP study will fall into one of a few categories:

  • An arrhythmia is identified and treated in the same session with catheter ablation - the most straightforward and common outcome.
  • An arrhythmia is identified but is not suitable for ablation in that session, and a plan for further management is made.
  • No arrhythmia can be provoked - this is also useful information, as it may help rule out certain electrical causes for your symptoms.

After the procedure, Dr. Kaba will explain exactly what was found, what it means for you, and what the next steps are.

What we find and what comes next

The results of an EP study will fall into one of a few categories:

  • An arrhythmia is identified and treated in the same session with catheter ablation - the most straightforward and common outcome.
  • An arrhythmia is identified but is not suitable for ablation in that session, and a plan for further management is made.
  • No arrhythmia can be provoked - this is also useful information, as it may help rule out certain electrical causes for your symptoms.

After the procedure, Dr. Kaba will explain exactly what was found, what it means for you, and what the next steps are.

Recovery

After an EP study, you will rest for several hours while the wires are removed and the puncture site in the groin heals. Firm pressure is applied to prevent bleeding.

  • Most patients go home on the same day, or after one night if an ablation was also performed.
  • You will need to keep the groin area dry and avoid strenuous activity for a few days.
  • Most people return to normal daily activities within two to three days.

Risks and Complications

An EP study is a safe procedure. Serious complications are uncommon. The main risks include:

  • Bruising or a small haematoma at the puncture site in the groin - common and usually minor.
  • Vascular injury - damage to the blood vessel at the puncture site is rare but possible.
  • Arrhythmia - while arrhythmias are deliberately provoked during the study, they are managed by the team in a controlled environment.
  • Cardiac perforation - a very rare risk when wires are inside the heart.
  • Radiation exposure - from the X-ray guidance used during the procedure. The dose is kept as low as possible.

Frequently
asked questions

You will receive sedation to keep you comfortable and relaxed. In some cases, particularly if a longer procedure is planned, general anaesthesia may be used. Dr. Kaba will discuss this with you beforehand.

Not exactly, though the two are closely linked. An EP study is a diagnostic procedure - it maps the electrical system of your heart. Catheter ablation is the treatment that follows if a treatable arrhythmia is found. In many cases, both are carried out in the same session.

A negative EP study is still useful information. It can help rule out certain electrical causes of your symptoms and guide further investigation or management. Dr. Kaba will explain what the result means for you specifically.

For a straightforward EP study without ablation, most patients go home the same day. If ablation is also performed, an overnight stay is more likely. Dr. Kaba will discuss this with you before the procedure.

The groin puncture site is numbed with local anaesthetic before the wires are passed. With sedation, most patients find the procedure very tolerable. Some patients feel their heart beating quickly during the study - this is expected and carefully managed by the team.

It depends on the medication. Some anti-arrhythmic drugs can suppress arrhythmias and make them harder to provoke during the study. Dr. Kaba will give you specific written instructions about which medications to take and which to pause in the days before the procedure.

Why Dr Kaba

Why choose Dr Kaba for Electrophysiology Study?

An EP study requires real-time interpretation of complex electrical signals - and where an arrhythmia is found, the ability to treat it in the same session. Dr. Kaba's extensive experience in advanced cardiac mapping means findings are acted on quickly and accurately.

  • Dr. Kaba has spent over 25 years caring for patients with heart rhythm disorders. He performs these procedures regularly so you benefit from a level of skill and familiarity that only comes with high-volume specialist practice.
  • He trained in London and held a visiting professorship at Columbia University in New York. He has performed world-first and UK-first procedures, leads a research team at City St. George's, University of London, and has received awards from the European Society of Cardiology and the Heart Rhythm Society in the USA.
  • Patients come to see Dr. Kaba from across the UK, Europe, the Middle East, and Asia. He speaks several languages and takes the time to make sure you fully understand your condition, your options, and what to expect before, during, and after any procedure.
Portrait of Dr Kaba

What private care means for you

Private care gives you timely access to specialist cardiac expertise, clear communication at each step, and a personalised treatment pathway built around your clinical needs. You receive continuity of consultant-led care from initial assessment through to follow-up.

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