An electrophysiology study is a test that looks at the electrical system of the heart. It is done to find out why someone's heart may beat too slowly or too quickly, or why it does not beat in a regular pattern.
A cardiologist (doctor who specializes in the heart) does the test. During the electrophysiology study, the doctor inserts flexible catheters, or wires, into veins and guides them into the heart. Through these catheters, the doctor can look at and record the electrical activity of the heart.
Sometimes an ablation is done to treat an electrical problem found during an electrophysiology study. An ablation occurs when a signal of energy is sent through the catheter to destroy heart cells that are causing the abnormal heartbeat.