His bundle electrogram
- intracardiac electrogram of potentials in the lower right atrium, atrioventricular node, and His-Purkinje system, obtained by positioning intracardiac electrodes near the tricuspid valve; it is used to pinpoint the site, extent, and mechanisms of arrhythmias and conduction defects. See illustration.
Medical dictionary. 2011.
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His — Wilhelm, Jr., German physician, 1863–1934. See H. band, H. bundle, H. bundle electrogram, H. spindle, Kent H. bundle, H. Tawara system. Wilhelm, Sr., Swiss anatomist and embryologist in Germany, 1831–1904. See H. copula, H. line, H. perivascular… … Medical dictionary
electrogram — 1. Any record on paper or film made by an electrical event. 2. In electrophysiology, a recording taken directly from the surface by unipolar or bipolar leads. His bundle e. ( … Medical dictionary
intracardiac electrogram — a record of changes in the electric potentials of specific cardiac loci as measured by electrodes placed within the heart via cardiac catheters; it is used for loci that cannot be assessed by body surface electrodes, such as the bundle of His or… … Medical dictionary
HBE — • His bundle electrogram … Dictionary of medical acronyms & abbreviations
H deflection — His bundle deflection in the His bundle electrogram, the deflection due to advance of the depolarizing impulse through the bundle of His. See also illustration at electrogram … Medical dictionary
conduction — 1. The act of transmitting or conveying certain forms of energy, such as heat, sound, or electricity, from one point to another, without evident movement in the conducting body. 2. The transmission of stimuli of various sorts by living protoplasm … Medical dictionary
HBE — Abbreviation for His bundle electrogram. * * * His bundle electrogram * * * His bundle electrogram … Medical dictionary
interval — A time or space between two periods or objects; a break in continuity. [L. inter vallum, space between breastworks in a camp, an i., fr. vallum, a rampart, wall] a c i. the i. between the onset of the a wave and that of the c wave of the jugular… … Medical dictionary
third degree atrioventricular block — a third degree heart block due to total cessation of impulse conduction through the atrioventricular junctional tissue; no correspondence exists between atrial and ventricular activity, and ventricular asystole and death occur unless a… … Medical dictionary
A wave — 1. a compound muscle action potential evoked by a submaximal stimulus to the motor nerve of a muscle, occurring because of an axon reflex and due to axonal branching; it has an amplitude similar to that of the F wave but a shorter, more constant… … Medical dictionary