(1) The feasibility of estimating these parameters, demonstrated by the present study, suggests that a recursive least squares estimation procedure could be used to recover the time variation of each parameter during exercise stress testing of subjects with normal or nearly normal gas exchange.
(2) We have investigated the properties of a recursive process in which the output signal from a given RF excitation pulse may be used as the input (excitation) pulse of a subsequent iteration.
(3) A simple recursive formula, which yields an estimate for the statistical error resulting from pipetting errors accumulated throughout a dilution procedure, is described.
(4) A new three dimensional (3-D) recursive tracing algorithm was proposed.
(5) In the experimental analog, genetic selection or screening applied during recursive ensemble mutagenesis should force the evolution of an ensemble of mutants to a targeted cluster of related phenotypes.
(6) To account for the superior prognosis of hyperdiploid, B-progenitor acute lymphoblastic leukemia (ALL), we investigated the influence of trisomy in 1021 children greater than or equal to 1 year old by recursive partitioning analysis.
(7) The equilibrium equation for mixtures of two mutually competitive tight-binding ligands can be expressed in a recursive form, a form in which the dependent variable appears on both sides and the solution is found iteratively.
(8) Given the probability density, f(t), for time spent in the random compartment of the cell cycle, we derive a recursion relation for psi n(x), the probability density for cell size at birth in a sample of cells in generation n. For the case of exponential growth of cells, the recursion relation has no steady-state solution.
(9) Assuming bivariate normal distributions, it is shown that in the latter case genotypic and phenotypic means and variances, and genotype-phenotype correlation can be expressed recursively as functions of the parameters for the selection, environmental, and mutation variance.
(10) A simple recursive model of Palmore, George and Fillenbaum served as a theoretical guideline.
(11) A recursive procedure has been developed for separating the incoherent intensity from the coherent intensity via a Gaussian probability model of the membrane intra-pair separation.
(12) This paper concerns a recursive partitioning algorithm for incomplete survival data.
(13) And only by moving to this level do we avoid the vicious circularity that could befall the use of recursive systems.
(14) A recursive algorithm for estimating the higher-order statistics of arbitrary-function type, mean, and variance is obtained by introducing a new expansion form of Bayes' theorem.
(15) A recursive algorithm to compute the exact distribution of the conditional sufficient statistics of the parameters of the logistic model for such a design is given.
(16) A method of calculating inbreeding coefficients is described using a recursive algorithm.
(17) More complex cascades can be analysed recursively by subdividing them into simpler modules, which can be treated individually.
(18) The method uses a recursive algorithm for the solution of an initial-value problem in the time domain, combined with a fast Fourier transform (FFT) convolution in the space domain at each time step.
(19) Because it is a well known technique, the FFT method is only briefly described, while the philosophy of the MESE method is given in more detail and completed with a description of the recursive algorithm; (ii) select a frequency parameter suitable to describe the SMG.
(20) Both logistic regression and recursive partitioning methods for discrimination were tried.
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.