An electrophysiology (EP) study gathers information about the electrical system in the heart to find the cause of heart rhythm problems.
During an electrophysiology (EP) study, your doctor and his or her accompanying medical assistance team will insert small wires called electrode catheters into the heart through a blood vessel. The catheters may direct electrical signals to your heart to stimulate it and test for an arrhythmia. They also may be used to map where abnormal signals are coming from in the heart. During an EP study, catheters may be used to regulate the heartbeat to stop an arrhythmia or to perform a catheter ablation, which treats an arrhythmia.