Electrophysiology (EP) study

An electrophysiology, or EP, study is an accurate method for assessing the heart’s electrical function. It allows doctors to locate abnormalities inside the heart that may be causing irregular heart rhythms known as arrhythmias.

During an EP study, doctors insert long, flexible wires called electrode catheters into veins and guide them into the heart. Once inside the heart, the catheters can sense electrical impulses in various areas of the heart. They also can be used to stimulate different parts of the heart.

Why is the EP study important?

The EP study provides more accurate and detailed information about the heart’s electrical function than other diagnostic tests. It helps doctors diagnose the problem accurately and enables them to choose the most effective treatment.

EP studies are most useful in people who have had life-threatening arrhythmias, and in people with persistent symptoms resulting from suspected arrhythmias that could not be diagnosed with other tests.