What is electrophysiology testing?
Electrophysiology testing is used to investigate abnormal heart rhythms, also known as arrhythmias. By recording and studying the electrical activity of the heart, our specialists are able to determine the underlying cause of the arrhythmia and identify the most appropriate course of treatment.
To do this, the investigation aims to induce an accelerated heartbeat in a controlled, monitored environment, allowing our specialists to detect which part of the heart is responsible for the abnormal rhythm.
Our specialists can conduct electrophysiology tests at our Harefield and Royal Brompton hospitals, which are globally acknowledged for their quality and innovation in cardiology. We have been recognised by the Arrhythmia Alliance as a ‘Centre of Excellence’ for our work in this field.
Experts in electrophysiology testing
Our electrophysiologists offer:
- access to the latest leadless pacemaker technologies
- short-notice appointments, in as little as 24 hours
- a swift pathway from diagnosis to treatment
Investigation details
What does an electrophysiology study involve?
A number of small thin tubes – called catheters – will be placed into a vein (usually via the groin) and guided to your heart via a fluoroscopy machine, which uses x-rays.
Your doctor will use a pacemaker to deliver electrical impulses to the heart via each of the catheters. The goal is to bring on an accelerated heart beat, and detect which area of the heart is causing abnormal heart rhythms. Medications are administered via your intravenous therapy to see which is most effective at treating the arrhythmia.
If needed, your consultant will carry out a catheter ablation to treat the problem, by destroying the parts of the heart that are causing it.
Recovery after an electrophysiology study
The test usually takes between two and four hours, but may be longer if a catheter ablation is required. You may feel dizzy during the procedure if you experience heart palpitations. You may also feel tired afterwards, but this should disappear within a couple of days.
To find out more about electrophysiology testing, or how it could be relevant for you, contact our team.
Related video
The following video features Professor Sabine Ernst, consultant cardiologist and electrophysiologist.
Risks of electrophysiology testing for arrhythmias
As with any operation and procedure, there is a small degree of risk. Bleeding from where the catheters were placed may cause a haematoma (a collection of blood under the skin), but this should clear up within a couple of days.
There is also a small risk of damage to the heart’s electrical pathways, resulting in the need for a pacemaker to be fitted.
For more information, contact our team.
Reviewed regularly to reflect clinical best practice
Last reviewed: 11 May 2026
Locations
Our specialists can carry out electrophysiology testing at the following locations:
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