| GBP scan | Gated Blood Pool (cardiac) scan = GBPS 1. LV ±â´É ÃøÁ¤ 2. ... |
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| GBPS | Gated Blood Pool cardiac Scan = GBP scan |
| CNGC | cyclic nucleotide gated channel |
| EGRA | equilibrium-gated radionuclide angiography |
| GBP | galactose-binding protein; gastric bypass; gated blood pool |
| BCF | Beat cross frequency |
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| CBF | Ciliary beat frequency |
| IBI | Inter Beat Interval |
| bpm | beat per minute |
| CNG | Cyclic nucleotide gated |
| beat-to-beat variability | Variability of foetal heart rate measured in changes in the QRS-QRS interval from heart beat to heart beat; measured with electronic internal foetal heart rate monitors. Continuous variation, a series of very slight variation's. (05 Mar 2000) |
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| gated blood pool imaging | Radionuclide ventriculography where scintigraphic data is acquired during repeated cardiac cycles at specific times in the cycle, using an electrocardiographic synchroniser or gating device. Analysis of right ventricular function is difficult with this technique; that is best evaluated by first-pass ventriculography (ventriculography, first-pass). (12 Dec 1998) |
| gated ion channel | <physiology> Transmembrane proteins of excitable cells, that allow a flux of ions to pass only under defined circumstances. Channels may be either voltage gated, such as the sodium channel of neurons or ligand gated such as the acetylcholine receptor of cholinergic synapses. Channels tend to be relatively ion specific and allow fluxes of typically 1000 ions to pass in around 1ms, they are thus much faster at moving ions across a membrane than transport ATPases. (05 May 1997) |
| gated radionuclide angiocardiography | Radionuclide angiocardiography using cardiac gating to combine images from several cardiac cycles to improve the quality of the images of separate phases (e.g., systole and diastole). (05 Mar 2000) |
| voltage-gated channel | A class of ion channel's that open and close in response to change in the electrical potential across the plasma membrane of the cell; voltage-gated Na+ c.'s are important for conducting action potential along nerve cell processes. (05 Mar 2000) |
| voltage gated ion channel | <physiology> A transmembrane ion channel whose permeability to ions is extremely sensitive to the transmembrane potential difference. These channels are essential for neuronal signal transmission and for intracellular signal transduction. See: sodium channel. (18 Nov 1997) |
| ligand-gated channel | A class of ion channel's whose ionic permeability is regulated by cell membrane receptors that respond to specific extracellular chemical signals. (05 Mar 2000) |
| ligand gated ion channel | A transmembrane ion channel whose permeability is increased by the binding of a specific ligand, typically a neurotransmitter at a chemical synapse. The permeability change is often drastic, such channels let through effectively no ions when shut, but allow passage at up to 10exp7 ions sexp 1 when a ligand is bound. Recently, the receptors for both acetylcholine and GABA have been found to share considerable sequence homology, implying that there may be a family of structurally related ligand gated ion channels. (18 Nov 1997) |
| apex beat | The visible and/or palpable pulsation made by the apex of the left ventricle as it strikes the chest wall in systole; normally in the fifth intercostal space, about 10 cm to the left of the median line. (05 Mar 2000) |
| atrial capture beat | The cardiac cycle resulting when, after a period of A-V dissociation, the atria regain control of the ventricles; atrial depolarisation due to retrograde transmission from a ventricular ectopic beat or an electronically paced ventricular impulse. (05 Mar 2000) |
| atrial fusion beat | A beat that occurs when the atria are activated in part by the sinus impulse and in part by an ectopic or retrograde impulse from A-V junction or ventricle. (05 Mar 2000) |
| automatic beat | In contrast to forced beat, an ectopic beat that arises de novo and is not precipitated by the preceding beat; thus escaped and parasystolic beat's are automatic. Synonym: automatic contraction. (05 Mar 2000) |
| beat | 1. To strike repeatedly; to lay repeated blows upon; as, to beat one's breast; to beat iron so as to shape it; to beat grain, in order to force out the seeds; to beat eggs and sugar; to beat a drum. "Thou shalt beat some of it [spices] very small." (Ex. Xxx. 36) "They did beat the gold into thin plates." (Ex. Xxxix. 3) 2. To punish by blows; to thrash. 3. To scour or range over in hunting, accompanied with the noise made by striking bushes, etc, for the purpose of rousing game. "To beat the woods, and rouse the bounding prey." (Prior) 4. To dash against, or strike, as with water or wind. "A frozen continent . . . Beat with perpetual storms." (Milton) 5. To tread, as a path. "Pass awful gulfs, and beat my painful way." (Blackmore) 6. To overcome in a battle, contest, strife, race, game, etc.; to vanquish or conquer; to surpass. "He beat them in a bloody battle." (Prescott) "For loveliness, it would be hard to beat that." (M. Arnold) 7. To cheat; to chouse; to swindle; to defraud; often with out. 8. To exercise severely; to perplex; to trouble. "Why should any one . . . Beat his head about the Latin grammar who does not intend to be a critic?" (Locke) 9. To give the signal for, by beat of drum; to sound by beat of drum; as, to beat an alarm, a charge, a parley, a retreat; to beat the general, the reveille, the tattoo. See Alarm, Charge, Parley, etc. To beat down, to haggle with (any one) to secure a lower price; to force down. To beat into, to teach or instill, by repetition. To beat off, to repel or drive back. To beat out, to extend by hammering. To beat out of a thing, to cause to relinquish it, or give it up. "Nor can anything beat their posterity out of it to this day." . To beat the dust. To take in too little ground with the fore legs, as a horse. To perform curvets too precipitately or too low. To beat the hoof, to walk; to go on foot. To beat the wing, to flutter; to move with fluttering agitation. To beat time, to measure or regulate time in music by the motion of the hand or foot. To beat up, to attack suddenly; to alarm or disturb; as, to beat up an enemy's quarters. Synonym: To strike, pound, bang, buffet, maul, drub, thump, baste, thwack, thrash, pommel, cudgel, belabor, conquer, defeat, vanquish, overcome. Origin: OE. Beaten, beten, AS. Beatan; akin to Icel. Bauta, OHG. Bzan. Cf. 1st Butt, Button. 1. To strike repeatedly; to inflict repeated blaows; to knock vigorously or loudly. "The men of the city . . . Beat at the door." (Judges. Xix. 22) 2. To move with pulsation or throbbing. "A thousand hearts beat happily." (Byron) 3. To come or act with violence; to dash or fall with force; to strike anything, as, rain, wind, and waves do. "Sees rolling tempests vainly beat below." (Dryden) "They [winds] beat at the crazy casement." (Longfellow) "The sun beat upon the head of Jonah, that he fainted, and wisbed in himself to die." (Jonah iv. 8) "Public envy seemeth to beat chiefly upon ministers." (Bacon) 4. To be in agitation or doubt. "To still my beating mind." (Shak). 5. To make progress against the wind, by sailing in a zigzag line or traverse. 6. To make a sound when struck; as, the drums beat. 7. To make a succession of strokes on a drum; as, the drummers beat to call soldiers to their quarters. 8. <physics> To sound with more or less rapid alternations of greater and less intensity, so as to produce a pulsating effect; said of instruments, tones, or vibrations, not perfectly in unison. A beating wind, to run first one way and then another; said of a stag. To beat up for recruits, to go diligently about in order to get helpers or participators in an enterprise. 1. A stroke; a blow. "He, with a careless beat, Struck out the mute creation at a heat." (Dryden) 2. A recurring stroke; a throb; a pulsation; as, a beat of the heart; the beat of the pulse. 3. The rise or fall of the hand or foot, marking the divisions of time; a division of the measure so marked. In the rhythm of music the beat is the unit. A transient grace note, struck immediately before the one it is intended to ornament. 4. <physics> A sudden swelling or reenforcement of a sound, recurring at regular intervals, and produced by the interference of sound waves of slightly different periods of vibrations; applied also, by analogy, to other kinds of wave motions; the pulsation or throbbing produced by the vibrating together of two tones not quite in unison. See Beat. 5. A round or course which is frequently gone over; as, a watchman's beat. 6. A place of habitual or frequent resort. 7. A cheat or swindler of the lowest grade; often emphasized by dead; as, a dead beat. Beat of drum, a succession of strokes varied, in different ways, for particular purposes, as to regulate a march, to call soldiers to their arms or quarters, to direct an attack, or retreat, etc. Beat of a watch, or clock, the stroke or sound made by the action of the escapement. A clock is in beat or out of beat, according as the strokes is at equal or unequal intervals. Source: Websters Dictionary (01 Mar 1998) |
| ventricular fusion beat | A fusion beat that occurs when the ventricles are activated partly by the descending sinus or A-V junctional impulse and partly by an ectopic ventricular impulse. (05 Mar 2000) |
| parasystolic beat | A cardiac arrhythmia caused by the interaction of two foci independently initiating cardiac impulses at different rates. Generally one of the foci is the sinoatrial node (the normal pacemaker) and the ectopic focus is usually in the ventricle, but can occur in the sinus and av nodes, atrium and ventricle, and av junction. Each focus - and thus each rhythm - is protected from the influence of the other. (12 Dec 1998) |
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