P-wave dispersion measurement: Methodological considerations

P-wave duration and dispersion analysis: methodological considerations.

Methodological Considerations To the Editor: With great interest, we have read the article of Fan and colleagues1 on the effects of biatrial pacing in the prevention of postoperative atrial fibrillation after coronary artery bypass surgery. By measuring P-wave duration from 12-lead surface ECGs and calculating P-wave dispersion, they found that biatrial pacing resulted in a more significant red...

P-wave Dispersion in Patients with Major Thalassemia

Abstract Background Prolonged P-wave duration and P-wave dispersion indicate interatrial conduction disturbance and early predict arrhythmia especially atrial fibrillation. Iron deposition in the atrial tissue might prolonged the atrial conduction time, and this study evaluated the P-wave prolongation and increased P-Wave dispersion in these patients. Materials and Methods Fifty patients w...

Towards the Dispersion Relations for Dielectric Optical Fibers with Helical Windings under Slow- and Fast-wave Considerations — a Comparative Analysis

The paper presents the electromagnetic (EM) wave propagation in cylindrical optical fibers with helical windings under slowand fast-wave considerations. Field components are deduced for both the cases, and also, the dispersion relations are obtained by applying the boundary conditions, as modified by the presence of conducting helical windings. Two special cases are considered corresponding to ...

Methodological considerations in the measurement of subjective well-being 2. METHODOLOGICAL CONSIDERATIONS IN THE MEASUREMENT OF SUBJECTIVE WELL-BEING

An Analytic Study on the Dispersion of Love Wave Propagation in Double Layers Lying Over Inhomogeneous Half-Space

In this work, attempts are made to study the dispersion of Love waves in dry sandy layer sandwiched between fiber reinforced layer and inhomogeneous half space.Inhomogeneity in half space associated with density and rigidity and considered in exponential form. Displacement components for fiber reinforced layer, dry sandy layer and inhomogeneous half-space have been obtained by using method of s...