Cardiac Electrophysiology Study in Gwinnett County & Atlanta Metro
An advanced diagnostic procedure performed by CVG’s board-certified electrophysiologists to map your heart’s electrical system and identify the cause of abnormal heart rhythms.
An electrophysiology study, commonly called an EP study, is an advanced diagnostic procedure that maps the electrical system of your heart to identify the precise origin and mechanism of abnormal heart rhythms. It is the most detailed and definitive test available for evaluating cardiac arrhythmias and, in many cases, allows CVG’s electrophysiology specialists to diagnose and treat the problem in a single procedure.
If you have been referred for an EP study, this page explains what the procedure involves, what conditions it can identify, and what to expect before, during, and after your visit at CVG. Our board-certified electrophysiologists perform EP studies across our network of 11 locations in Gwinnett County and the Atlanta metro, bringing specialist-level arrhythmia care close to home.
What Is a Cardiac Electrophysiology Study?
A cardiac electrophysiology study is an advanced diagnostic procedure that maps the electrical system of your heart in precise detail. While a standard EKG captures a snapshot of your heart’s electrical activity at rest, an EP study goes much further, allowing CVG’s electrophysiology specialists to observe how electrical signals travel through every region of your heart, identify exactly where abnormal rhythms are originating, and determine the most effective treatment path forward.
EP studies are the most definitive test available for evaluating complex or unexplained heart rhythm disorders, and in many cases, allow CVG’s electrophysiology team to diagnose and treat the arrhythmia in the same session.
At CVG, EP studies are performed by board-certified electrophysiologists, cardiologists with advanced subspecialty training dedicated specifically to the diagnosis and treatment of heart rhythm disorders.
Who Needs an Electrophysiology Study?
Your CVG cardiologist may recommend an electrophysiology study if you are experiencing symptoms that suggest a heart rhythm disorder, or if other tests have detected an abnormal rhythm that requires further evaluation. Common reasons an EP study is ordered include:
- Unexplained fainting (syncope) or near-fainting episodes
- Heart palpitations – a racing, fluttering, or pounding sensation that has not been captured on a standard EKG or Holter monitor
- A documented arrhythmia such as atrial fibrillation, atrial flutter, or SVT requiring further characterization before treatment
- Ventricular tachycardia or other complex rhythm disorders requiring precise mapping
- Evaluation for catheter ablation to confirm the target location before the ablation procedure
- Assessment of the effectiveness of antiarrhythmic medications
- Evaluation for a pacemaker or implantable cardioverter-defibrillator (ICD) in patients with conduction disorders
An EP study is typically recommended when less invasive testing has not provided a definitive diagnosis, or when the nature and origin of an arrhythmia needs to be precisely mapped before a treatment decision is made.
How an Electrophysiology Study Works
An EP study is performed in a specialized cardiac catheterization laboratory by CVG’s electrophysiology team. Here is a step-by-step overview of what happens at each stage.
Before the Procedure: You will be asked to fast for several hours before your EP study. Your CVG electrophysiologist will review your current medications and advise you on which to take or pause in the days leading up to the procedure. When you arrive, an IV line will be placed, monitoring leads will be attached, and a mild sedative will be administered to keep you relaxed and comfortable. Most patients remain conscious and responsive throughout the procedure.
During the Procedure: Small incisions are typically made in the groin area to insert thin, flexible wires, called electrode catheters, into the blood vessels. These catheters are guided to specific areas within the heart using real-time X-ray imaging (fluoroscopy).
Once in position, the catheters record the heart’s electrical activity in detail, both at rest and during controlled stimulation. Your electrophysiologist may send small electrical impulses through the catheters to pace the heart at different rates, safely trigger an arrhythmia in a controlled environment, or map the precise pathway of abnormal electrical signals. In some cases, medication may be administered to increase heart rate and observe how it responds.
If a treatable arrhythmia is identified during the study, your electrophysiologist may perform catheter ablation during the same procedure, using radiofrequency heat or cryoablation cold to eliminate the abnormal electrical pathway immediately. This ability to diagnose and treat in a single session significantly reduces the need for multiple procedures.
An EP study typically takes between one and four hours, depending on the complexity of your arrhythmia. If catheter ablation is performed during the same session, the procedure will take longer.
After the Procedure: You will be monitored in a recovery area for several hours after your EP study. Most patients are discharged the same day, though an overnight stay may be required depending on the findings and any treatment performed. Your CVG electrophysiologist will discuss the results with you and outline the recommended next steps for your care.
Conditions Diagnosed with an Electrophysiology Study
An EP study is the most precise diagnostic tool available for evaluating heart rhythm disorders. CVG’s electrophysiology specialists use EP studies to diagnose and characterize the following conditions:
Atrial Fibrillation (AFib) – the most common sustained arrhythmia, characterized by chaotic electrical activity in the upper chambers of the heart.
Atrial Flutter – a rapid but more regular arrhythmia originating in the right atrium, often treated with a highly effective ablation procedure.
Supraventricular Tachycardia (SVT) – a group of fast heart rhythm disorders originating above the ventricles, including AVNRT and AVRT.
Ventricular Tachycardia (VT) – a potentially dangerous fast rhythm originating in the lower chambers of the heart, requiring careful mapping and evaluation.
Wolff-Parkinson-White
Syndrome (WPW) – a condition caused by an extra electrical pathway between the upper and lower chambers, which can trigger rapid arrhythmias
Unexplained Fainting (Syncope) – when fainting episodes are suspected to be arrhythmia-related and have not been captured by standard monitoring.
Conduction System Disorders – including heart block and sick sinus syndrome, which affect how electrical signals travel through the heart and may indicate the need for a pacemaker
Additionally, EP studies can assess the effectiveness of antiarrhythmic medications and evaluate whether an implantable cardioverter-defibrillator (ICD) or pacemaker is warranted.
Frequently Asked Questions
Why Choose CVG for Your Electrophysiology Study
An electrophysiology study is a highly specialized procedure, and the expertise of your EP team directly impacts the accuracy of your diagnosis and the effectiveness of your treatment. CVG’s board-certified electrophysiologists bring advanced subspecialty training in cardiac arrhythmia mapping and ablation, with extensive experience performing EP studies for the full range of heart rhythm disorders.
When an arrhythmia is identified during your EP study, CVG’s team has the training and technology to treat it in the same session, reducing the number of procedures you undergo and getting you back to normal life faster. With 11 locations across Gwinnett County and the Atlanta metro and a history of caring for Georgia patients since 1982, expert electrophysiology care is closer than you think.