What's the difference between reentrant and reentry?
Reentrant
Definition:
(a.) Reentering; pointing or directed inwardds; as, a re/ntrant angle.
Example Sentences:
(1) During electrophysiologic study, the effect of propafenone on the effective refractory period of the accessory pathway was determined, as well as its effect during orthodromic atrioventricular (AV) reentrant tachycardia and atrial fibrillation.
(2) The electrophysiologic studies of three patients with accessory pathways and multiple reentrant circuits are reported.
(3) In 2 pts, reentrant beats conducted on the FP antegradely and on SP retrogradely.
(4) It is possible that such action potentials are responsible for the reentrant and automatic arrhythmias which occur in association with clinical cardiac disease.
(5) Intravenous flecainide was successful in terminating ongoing tachycardias in 81% of reported cases of atrioventricular (AV) nodal reentrant tachycardias, 88% of AV reentrant tachycardias and 100% of atrial tachycardias.
(6) The effect of the autonomic system on conduction disorders in the infarction zone (IZ) and related reentrant ventricular arrhythmias (RVA) in the late myocardial infarction period in the dog was studied utilizing averaged recordings of the reentrant pathways from the epicardial surface of the IZ.
(7) The purpose of this study was to investigate the role of tissue anisotropy and dispersion of refractoriness on initiation of reentrant ventricular tachycardia (VT).
(8) In two dogs, the reentrant circuit was located intramurally in close proximity to a patchy septal infarction.
(9) The experiments performed on two wethers provided with simple rumen cannulas and reentrant cannulas, inserted into the proximal duodenum and ileum, showed a passage of 15N from labelled urea, injected intravenously, from the blood to the digestive tract.
(10) The time dependence of nonuniform propagation and the relatively high conduction velocities explain two major characteristics of reentrant tachycardias in acute ischemia: the large diameters of reentrant circuits and the beat-to-beat changes in localization of conduction block.
(11) The ablated pathway was the His bundle in 8 patients, an accessory pathway in 3 patients and a ventricular reentrant circuit in 1 patient.
(12) All 20 patients (100%) with AV node reentrant tachycardia treated with diltiazem had conversion of tachycardia to sinus rhythm as did 26 (81%) of 30 patients with AV reciprocating tachycardia treated with diltiazem.
(13) The electrophysiological effects of antiarrhythmic drugs were tested in 36 patients with recurrent paroxysmal supraventricular tachycardia (PSVT), 25 of whom had accessory pathway reentrant tachycardia (APRT) and 11 A-V nodal reentrant tachycardia (AVNRT; 10 of the slow-fast type one of the fast-slow type).
(14) Patients with atrioventricular nodal reentrant tachycardia were deduced to have simultaneous atrial and ventricular activation when no atrial signal could be seen elsewhere in the cycle.
(15) The patient has neither reentrant tachycardias nor atrial fibrillation episodes.
(16) Paroxysms cease when the conducting properties of the reentrant circuits are disturbed by changes in autonomic tone or the application of certain drugs, pacing, or cardioversion.
(17) Three out of 11 patients with atrioventricular nodal reentrant tachycardia (AVNRT) had VA values greater than or equal to 70 msec, while 5 of 28 patients with orthodromic reciprocating tachycardia (ORT) had values less than or equal to 70 msec.
(18) Low current, high frequency trains of stimuli, when applied at a site presumed to be close to the reentrant circuit, provided a safe and effective method of terminating the common type of AV node reentrant tachycardia.
(19) The two cases suggest the following conclusions: (1) dual A-V nodal pathways may allow the occurrence of double antegrade conduction of one P; (2) the atria are not necessary for A-V nodal circus movements in "dual pathway" A-V nodal reentrant PSVT.
(20) However, the right ventricular apex electrogram demonstrated a constant morphology with a decrease in cycle length equal to that of the other intracardiac electrograms, indicating a constant direction of activation from the ventricular tachycardia circuit, and that ventricular tachycardia had been transiently entrained by AV nodal reentrant tachycardia.
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%).