An Electrophysiological study (EP study) is associated with cardiac catheterisation (putting a tube through a blood vessel & passing it into the heart) & is used in categorising, managing and identifying cardiac arrhythmias. To cure heart rhythm disturbances, a thin electrode wire is inserted from the groin area or in some cases from the neck to thread electrodes into the heart through a type of x ray called fluroscopy.
Once in the heart, electrical signals are sent to evaluate the abnormal disturbances in the heart. The signals respond to a database where the information is collected and converted into a digital form via some algorithms that are ultimately displayed on screen for viewing. During each beat the spread of electrical pulses is mapped to know the region affected by the disease. The study also helps a doctor to check for further treatment like therapeutic measures such as changing or adding medications, adding pacemaker implants or CT scan.