An electrophysiologic study (EPS) is one of a number of tests of the
electrical conduction system of the heartperformed by a cardiac electrophysiologist, a specialist in the electrical conduction system of the heart. These tests are performed using catheters situated within the heart.
There are a number of different tests that fall under the heading of an electrophysiologic study (EP study). If the heart is electrically stimulated via the intracardiac catheter it is known as programmed electrical stimulation (PES). PES is used to help diagnose and risk stratify individuals with a number of rhythm disturbances of the
heart. Other studies that do not require extrinsic stimulation of the heart include conduction studies to determine if the individual's heart blockis at risk of progressing to complete heart block.
EP studies also allow the ablation of ectopic electrical foci causing supraventricular arrythmias
In order to perform an EP study, one or more catheters must be placed within the heart. The catheters are typically placed in the
right atriumand/or right ventriclevia one or more incisions made in the central venous system. The incisions are typically made in either the internal jugular vein, subclavian vein, or common femoral vein.
Catheters placed via the venous system enter the heart via the
right atrium. The advantage of this is that the right atrium is where the SA nodeis located. The right atrium is also the location of most of the common re-entrant pathways associated with atrial flutter. If a catheter is placed with the distal tip in the right ventricle, it may be possible to measure conduction through the bundle of His, which is useful to determine the level of heart block. If the catheter is placed in the coronary sinus, it is possible to measure electrical activity in both the left atrium and the left ventricle without entering the high pressure arterial system associated with the left side of the heart.
Additional advantages of using these
veins is that they are all part of the central venous system and do not have the valves that peripheral veins contain. The advantage of approaching the heart via the venous system as opposed to via the arterial system is that the risk of stroke is dramatically less if the arterial system is not used. Also, since the venous system is lower pressure, complications such as hematomas are typically easier to manage.
Electrical conduction system of the heart
Wikimedia Foundation. 2010.
Look at other dictionaries:
Electrophysiologic study (EPS) of the heart — A test of the electrical conduction system of the heart (the system that generates the heart beat). EPS 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… … Medical dictionary
cardiac electrophysiologic study — see cardiac electrophysiology under electrophysiology … Medical dictionary
Study, electrophysiologic (EPS) — A test of the electrical conduction system of the heart (the system that generates the heart beat). EPS 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… … Medical dictionary
Heart test, EPS — ElectroPhysiologic Study of the heart, a test of the electrical conduction system of the heart (the system that generates the heart beat). EPS is done by threading thin plastic tubes (catheters) into a vein where the leg connects to the abdomen.… … Medical dictionary
ESVEM — Electrophysiologic Study vs Electrocardiographic Monitoring … Medical dictionary
ESVEM — • Electrophysiologic Study vs Electrocardiographic Monitoring … Dictionary of medical acronyms & abbreviations
Trifascicular block — DiseaseDisorder infobox Name = Trifascicular heart block ICD10 = ICD10|I|45|3|i|30 ICD9 = ICD9|426.54 Trifascicular block is a problem with the electrical conduction of the heart. It is diagnosed on an electrocardiogram (ECG/EKG) and has three… … Wikipedia
Wolff-Parkinson-White syndrome — Infobox Disease Name = Wolff Parkinson White syndrome Caption = WPW is a syndrome of pre excitation of the ventricles , shaded in dark blue at the bottom. DiseasesDB = 14186 ICD10 = ICD10|I|45|6|i|30 ICD9 = ICD9|426.7 ICDO = OMIM = 194200… … Wikipedia
Mu rhythm — (μ rhythm) is a kind of brain wave rhythm measured using Electroencephalography that has a maximal amplitude of somatosensory cortices at rest. It is also called arciform rhythm because of the shape of the waveforms. Description Usually… … Wikipedia
Cardiac electrophysiology — is the science of elucidating, diagnosing, and treating the electrical activities of the heart. The term is usually used to describe studies of such phenomena by invasive (intracardiac) catheter recording of spontaneous activity as well as of… … Wikipedia