Clinical cardiac electrophysiology (also referred to as cardiac electrophysiology or simply EP), is a branch of the medical specialty of cardiology concerned with the study and treatment of rhythm disorders of the heart.[1] Cardiologists with expertise in this area are usually referred to as electrophysiologists. Electrophysiologists are trained in the mechanism, function, and performance of the electrical activities of the heart. Electrophysiologists work closely with other cardiologists and cardiac surgeons to assist or guide therapy for heart rhythm disturbances (arrhythmias). They are trained to perform interventional and surgical procedures to treat cardiac arrhythmia.
The training required to become an electrophysiologist is lengthy and requires eight years after medical school (in the U.S.), entailing three years of internal medicine residency, three years of clinical cardiology fellowship, and two years of clinical cardiac electrophysiology. This is necessary due to the significant complexity of patients that electrophysiologists usually treat, the constant advances in methods and equipment used in their daily practice, making the field of electrophysiology one of the most demanding subspecialties of modern medicine.
An electrophysiology study is any of a number of invasive (intracardiac) and non-invasive recording of spontaneous electrical activity, as well as of cardiac responses to programmed electrical stimulation. These studies are performed to assess arrhythmias, elucidate symptoms, evaluate abnormal electrocardiograms, assess risk of developing arrhythmias in the future, and design treatment.
In addition to diagnostic testing of the electrical properties of the heart, electrophysiologists are trained in therapeutic and surgical methods to treat many of the rhythm disturbances of the heart. Therapeutic modalities employed in this field include antiarrhythmic drug therapy and surgical implantation of pacemakers and implantable cardioverter-defibrillators.
^Katritsis, Demosthenes G.; Morady, Fred (2022). "1. Classification of arrythmias". Clinical Cardiac Electrophysiology: A Practical Guide. Philadelphia: Elsevier. ISBN 978-0-323-79338-4.
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