Electrophysiology is a division of cardiology that focuses on treatments and diagnoses of heart rhythm disorders or complications with the heart's electrical system, according to Emory Healthcare. This branch of cardiology care studies the efficiency of electrical impulses that prompt the heart to relax and contract.
Electrical impulse irregularities in the heart can cause patients' hearts to beat too fast, irregularly or too slowly, also known as arrhythmias, explains Emory Healthcare.
Electrophysiology studies record the electrical pathways leading to the heart and the electrical activity as the blood pumps to the heart, according to WebMD. Cardiac specialists use electrophysiology studies to determine causes of disturbances of the heart rhythm and to determine appropriate treatment.