An electrophysiology study also called an EP Study is a test to see if there is a problem with your heart rhythm and to find out how it can be fixed.

During the test the doctor inserts one or more flexible tubes, called catheters, into the veins in your groin, arm, or neck. Then he threads these catheters into the heart. At the tip of these catheters are electrodes, which are small pieces of metal that conduct electricity. The electrodes collect information about your heart’s electrical activity. The doctor can tell what kind of heart rhythm problems you have and where those problems are.

Sometimes the problem can be fixed at the same time.