What is an electrophysiology study?
An electrophysiology study, or EP study, examines how electrical signals travel through the heart. It can help identify the cause and location of an abnormal heart rhythm.
An electrophysiologist is a cardiologist with specialist training in the heart’s electrical system. The findings can help guide treatment decisions for selected rhythm disorders.
Why might an EP study be considered?
An EP study may be recommended when more information is needed about a heart rhythm problem. Symptoms prompting assessment can include palpitations, a fluttering sensation, dizziness, lightheadedness or breathlessness.
In selected circumstances, the study can also help assess the risk of a serious rhythm disturbance. Your doctor will explain why the test is being recommended in your case.
How are the electrical signals studied?
Thin, flexible catheters are passed through a blood vessel, commonly from the groin, and guided into the heart. Electrodes on the catheters record electrical activity at different points.
Specialised tests help map how signals move and where an abnormal rhythm may begin. The procedure is carried out in a hospital with monitoring and a specialist team.
What is radiofrequency ablation?
Radiofrequency ablation uses energy delivered through a catheter to create a small area of scar tissue at the source of an abnormal electrical pathway. This can prevent the signals responsible for certain arrhythmias from continuing.
An EP study and ablation may be planned together or separately. Your doctor will discuss whether ablation is suitable and what benefits, alternatives and limitations to expect.
Preparation, risks and follow-up
Ask your team about preparation, medicines, the planned anaesthetic or sedation, the expected hospital stay and recovery. Follow the instructions for your procedure rather than stopping medicines yourself.
Potential risks include bleeding, infection, damage to a blood vessel or the heart, blood clots and further rhythm problems. Monitoring and follow-up are arranged according to the procedure and your condition.
YOUR QUESTIONS
A little more clarity.
Is an EP study the same as ablation?
No. An EP study records and maps electrical activity. Ablation is a treatment for selected abnormal electrical pathways. They may be performed during the same visit.
Will I definitely have ablation after an EP study?
Not necessarily. The plan depends on the rhythm problem, the study findings and the treatment discussed with you.
What should I ask before the procedure?
Ask why the procedure is recommended, what alternatives exist, how to prepare, what risks apply to you and what follow-up will be needed.