An electrophysiological (EP) study is an invasive procedure that tests the heart's electrical system. The electrical system is what generates the heartbeat.
During an EP study, a small, plastic catheter (tube) is inserted through a vein in the groin (or, in some cases, the arm) and threaded into the heart using a special type of X-ray to guide the catheter.
Once the catheter is in place, electrical signals are sent through the catheter to the heart tissue. The purpose of the test is to evaluate the electrical-conduction system contained within the heart-muscle tissue.
An electrophysiology study examines the conduction system of the heart to:
- Diagnose an abnormal heart rhythm
- Determine the possible cause of lightheadedness or fainting
- Identify people at risk for a life-threatening irregular rhythm
- Determine if a pacemaker or other implanted device is necessary
- Determine if medical treatment is effective
This information is used by your physician to evaluate your treatment options.
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