What's the difference between impulse and reentry?
Impulse
Definition:
(n.) The act of impelling, or driving onward with sudden force; impulsion; especially, force so communicated as to produced motion suddenly, or immediately.
(n.) The effect of an impelling force; motion produced by a sudden or momentary force.
(n.) The action of a force during a very small interval of time; the effect of such action; as, the impulse of a sudden blow upon a hard elastic body.
(n.) A mental force which simply and directly urges to action; hasty inclination; sudden motive; momentary or transient influence of appetite or passion; propension; incitement; as, a man of good impulses; passion often gives a violent impulse to the will.
(v. t.) To impel; to incite.
Example Sentences:
(1) The method is implemented with a digital non-causal (zero-phase shift) filter, based on the convolution with a finite impulse response, to make the computation time compatible with the use of low-cost microcomputers.
(2) The distinguishing feature of this study is the simultaneous measurement of sympathetic firing and norepinephrine spillover in the same organ, the kidney, under conditions of intact sympathetic impulse traffic.
(3) All endings were electrotonically coupled to the M-cell, but impulses in less than 20% of the afferents produced chemically mediated excitatory postsynaptic potentials as well.
(4) In 27 decerebrate cats under various experimental conditions, we studied the effects of programmed premature ventricular contractions on the impulse activity of preganglionic sympathetic fibres isolated from the third left thoracic ramus.
(5) Response to a single, 5-mg dose of methylphenidate was compared in aggressive and nonaggressive attention-deficit hyperactivity disorder (ADHD) children using objective measures of inattention, impulsivity, and activity level.
(6) True Love Impulse Body Spray, Simple Kind to Skin Hydrating Light Moisturiser and VO5 Styling Mousse Extra Body marked double-digit price rises on average across the four chains.
(7) It is concluded that ADHD is a developmental disorder of attention, impulse control, and regulation of activity level that requires multiple treatment methods, which must be applied over long time intervals if they are to produce an impact on the outcome of children with ADHD.
(8) Impulses sufficiently large to stun adult sheep, with a non-penetrating impact head, were produced from an adapted Hantover pneumatic cattle stunner.
(9) The objective was to determine whether the parent axonal impulse train elicited by dual-hair stimulation was due to a temporal combining ("mixing"; Fukami, 1980) of the impulse trains elicited in the parent axons by the same stimulation to each hair alone.
(10) When afferent impulses were recorded from this fine nerve simultaneously with the blood pressure, two kinds of activity were observed.
(11) ADHD refers to a combination of symptoms in the general areas of inattention, impulsivity, and hyperactivity.
(12) Immediately after the onset of a current step the impulse frequency still declines.
(13) It imitates the conventional percussion massage of the thorax by introducing high-frequency gas oscillations (300 impulses per minute) into the tracheobronchial system.
(14) Mild amelioration of sleep-wakefulness cycles and impulse and drive functions could be observed clinically in both groups.
(15) It is concluded that a number of mechanisms can account for the conduction failure resulting from phospholipase A2, including disruption of sodium channels needed for propagation of regenerative nerve impulses and the depletion of high energy phosphates needed to maintain ionic gradients.
(16) With the aid of analysis of afferent impulse activity in the cat chorda tympani, it was shown that the effect of application of organic acids solutions of the same pH to the tongue could be represented as follows: propionic acid greater than lactic acid greater than pyruvic acid.
(17) Treadmill acceleration impulses were backwards or forwards directed, or their direction was inverted after 30 ms. Backwards directed impulses were followed by gastrocnemius and forwards directed ones by tibialis anterior EMG responses (latency 65-75 ms) whose duration depended on impulse duration.
(18) A propensity for elevated shear in the deep cartilage layer near the contact periphery, observed in nearly all computed stress distributions, is consistent with previous experimental findings of fissuring at that level in the impulsively loaded rabbit knee.
(19) Linear phase finite impulse response (FIR) filtering can be used to differentiate auditory brainstem evoked potentials (ABEP) components.
(20) In the pulsed mode, impulse duration and pause duration were varied between 50 and 500 ms. Total duration of coagulation was 30 s in all cases.
Reentry
Definition:
(n.) A second or new entry; as, a reentry into public life.
(n.) A resuming or retaking possession of what one has lately foregone; -- applied especially to land; the entry by a lessor upon the premises leased, on failure of the tenant to pay rent or perform the covenants in the lease.
Example Sentences:
(1) The behavior of the retrograde H deflection in respect to the first extra beat following the premature QRS complex helped in excluding bundle branch reentry.
(2) Amiodarone was able to suppress the premature ventricular beats, depress conduction and prolong refractoriness in both, the AV node and accessory pathway to prevent recurrences of atrioventricular reentry.
(3) The second surgical stage after a three-month reentry procedure was strictly for cosmetic improvement by means of a free gingival graft.
(4) Bigeminy and trigeminy zones probably correspond to the distribution patterns of VPCs predicted from modulation of a pacemaker and reflected reentry, both of which can be induced by electrotonically mediated impulses across a zone of impaired conduction in isolated bundles of Purkinje fibers.
(5) We conclude that the short P-R interval was due to intranodal reentry through the dual A-V nodal pathways.
(6) These conditions favor the occurrence of longitudinal unidirectional block and the initiation of reentry via transverse propagation.
(7) The authors of this review suggest that the alternating sequence of coronary spasm and dilatation should be described as the "thromboischemic reentry mechanism," which itself leads to waves of reperfusion, producing characteristic episodic changes in some of the parameters of AMI.
(8) Recent studies of human type 1 atrial flutter demonstrated reentry in the right atrium and an area of slow conduction in the low posteroseptal right atrium.
(9) The observed mechanisms included atrioventricular (A-V) node reentry (8), sino atrial node re-entry (5), re-entry through manifest or concealed lateral anomalous pathway (8), re-entry through A-V node bypasses (3), and atrial (7) and junctional (2) ectopic focuses.
(10) Double-mutant cells of the budding yeast Saccharomyces cerevisiae harboring the gcs1-1 and sed1-1 mutations are conditionally defective (cold-sensitive) only for reentry into the mitotic cycle from stationary phase.
(11) In contrast, in 24% of cases (5 of 21), initiation of the first beat of VT arose in either the subendocardium or subepicardium by a mechanism other than reentry as evidenced by the lack of intervening electrical activity between the end of the preceding sinus beat and the initiation of the ectopic beat.
(12) Successful aortocoronary reoperation is dependent on careful attention to special surgical technical considerations such as chest reentry, cardiopulmonary bypass management and myocardial preservation, primary graft handling and identification of the target coronary vessel, choice of available bypass conduits, completeness of revascularization, and hemostasis and blood conservation.
(13) Measurements relating to defect changes were made at the 12-month surgical reentry.
(14) Sternal reentry for reoperative cardiac procedures poses a substantial risk of technical problems.
(15) This indicates longitudinal dissociation within the reentry circuit: i.e., there are two functionally separate pathways in some part of the reentry circuit, and the reciprocating impulse runs alternatively through the two pathways.
(16) No evidence of axonal reentry into the distal nerve segment or new myelin formation was observed at times under 70 days.
(17) In case 1, the mechanism can be explained by an irregular parasystole due to a modulated parasystole; however, findings during temporary sinus arrest caused by vagal stimulation indicate that this case is not governed by a parasystole, but by a 2:1 concealed reentry.
(18) The first event is the active reentry of these cells into the cell cycle.
(19) The documentation of concealed AV nodal reentry is more difficult and should be considered if there is a sudden increase of the PR interval in the Wenckebach cycle.
(20) Given the methodology used in this study, the mapping characteristics of the tachycardias suggested five types of activation patterns: 1) complete (90% or more of VT cycle length) subendocardial reentry circuits in seven VTs (15%) and seven patients (25%), 2) complete subepicardial reentry circuits in four VTs (9%) and four patients (14%), 3) incompletely mapped circuits with a left ventricular endocardial breakthrough preceding the epicardial breakthrough in 25 VTs (53%) and 21 patients (75%), 4) incompletely mapped circuits with a left ventricular epicardial breakthrough preceding the endocardial breakthrough in three VTs (6%) and three patients (11%), and 5) a right ventricular epicardial breakthrough preceding the left ventricular endocardial breakthrough in eight VTs (17%) and seven patients (25%).