Cardiac electrophysiology

Cardiac electrophysiology or Electrocardiophysiology is a branch of cardiology and basic science focusing on the electrical activities of the heart. The term is usually used in clinical context, to describe studies of such phenomena by invasive (intracardiac) catheter recording of spontaneous activity as well as of cardiac responses to programmed electrical stimulation - clinical cardiac electrophysiology.

Source: Wikipedia — Cardiac electrophysiology (CC BY-SA 4.0)