Electrophysiology Study (EPS)

An Electrophysiology study (EPS) is a medical procedure used to evaluate the electrical activity of the heart. The purpose of an EPS is to diagnose and treat abnormal heart rhythms, also known as arrhythmias.

What happens during an EPS?

During an EPS, a small catheter (a thin, flexible tube) is inserted through a vein in the leg or arm and guided to the heart using X-ray imaging. The catheter is equipped with electrodes that record the electrical activity of the heart.

Types of EPS:

• Invasive EPS: This type of EPS involves inserting a catheter into the heart to directly record the electrical activity of the heart.
• Non-invasive EPS: This type of EPS uses external electrodes to record the electrical activity of the heart, such as an electrocardiogram (ECG) or Holter monitor.

Purposes of an EPS:

The main purposes of an EPS are to:

• Diagnose arrhythmias: An EPS can help diagnose abnormal heart rhythms, such as atrial fibrillation, ventricular tachycardia, or supraventricular tachycardia.
• Locate the source of an arrhythmia: An EPS can help identify the exact location in the heart where an arrhythmia is originating from.
• Guide treatment: The information obtained during an EPS can be used to guide treatment, such as catheter ablation or pacemaker implantation.

Risks and complications:

As with any medical procedure, there are risks and complications associated with an EPS, including:

• Bleeding or bruising at the catheter site
• Infection
• Damage to the heart or blood vessels
• Allergic reaction to the contrast dye used during the procedure

Preparation and aftercare:

To prepare for an EPS, patients may be asked to:

• Fast for several hours before the procedure
• Avoid certain medications, such as blood thinners
• Remove any jewelry or metal objects that may interfere with the X-ray imaging

After the procedure, patients may be monitored for several hours to ensure that there are no complications. They may also be given instructions on how to care for the catheter site and what activities to avoid.