- Electrophysiology (EP) is used to diagnose arrhythmias or to determine the exact cause of and plan treatment for an already-identified arrhythmia. (An arrhythmia is an abnormality or disturbance in the rate or rhythm of a person’s heartbeat.)
- EP tests examine the electrical activity and electrical pathways of the heart from inside the heart itself using small catheters (thin, flexible tubes). It is also referred to as EP testing, electrophysiology study, or EPS.
- During an EP test, physicians can monitor the heart’s electrical function or can stimulate the heart with electricity in order to produce and to observe the effects of an arrhythmia and to map the site it comes from.
Radiofrequency catheter ablation is sometimes performed as part of the EP test to selectively destroy small amounts of heart tissue that is interfering with electrical impulses.