Electronystagmogram: A recording of the eye movements, usually done to confirm the presence of nystagmus. Electronystagmogram may be done in cases of vertigo (dizziness) to determine if there is damage to the vestibular portion of the acoustic nerve. The test may be done in cases of possible acoustic neuroma, Meniere disease, positional vertigo, and labyrinthitis. Abbreviated ENG.
Electrophoresis: A method used in clinical and research laboratories for separating molecules according to their size and electrical charge. An electric current is passed through a medium that contains the mixture of molecules. Each kind of molecule travels through the medium at a different rate, depending on its electrical charge and molecular size. Separation of […]
Electrophoretic: Pertaining to electrophoresis, the separation of molecules according to their size and electrical charge by applying an electric current to them.
- Electrophysiologic retinal testing
Electrophysiologic retinal testing: Testing done to diagnose specific disorders of the retina, including inherited retinal diseases, the effects of toxic drug exposure on the retina, and the presence of foreign bodies within the eye. The most commonly performed electrophysiologic test is the electroretinogram (ERG). Other electrophysiologic tests include electro-oculography (EOG), visual evoked response (VER), dark […]
- Electrophysiologic study of the heart
Electrophysiologic study of the heart: A test of the electrical conduction system of the heart (the system that generates the heart beat). Electrophysiologic study (EPS) of the heart is done by threading thin plastic tubes (catheters) into a vein where the leg connects to the abdomen. A local anesthetic is given as well as a […]
- Electrophysiologic testing of the retina
Electrophysiologic testing of the retina: See: Electrophysiologic retinal testing .