background: noninvasive techniques for the localization of the accessory pathways (aps) might help guide mapping procedures and ablation techniques. we sought to examine the diagnostic accuracy of strain imaging for the localization of the aps in wolff-parkinson-white syndrome. methods: w e prospectively studied 25 patients (mean age = 32 ± 17 years, 58.3% men) with evidence of pre-excitation o...

conclusions the results showed that, compared to participants with normal weights, physiological and thermal perceptual responses were higher in overweight participants. therefore, overweight individuals should avoid hot/dry weather conditions to decrease the amount of heat strain. results in both groups, oral temperature, heart rate, and thermal perceptual responses increased during heat expos...

BACKGROUND The epicardial border zone (EBZ) of surviving myocytes in the healing, 4- to 5-day-old canine infarct is an arrhythmogenic substrate characterized by both structural and functional remodeling of Cx43. Unknown is whether the remodeling of gap junction conductance is heterogeneous in the EBZ like that of sarcolemmal ion channel remodeling and how remodeling of the gap junction influenc...

Values of the strain-rate tensor r epresented at a 20 m length sca le a re found to explain the pattern and orientation of crevasses in a 0.13 km 2 reach of Worthington Glacier, Alaska, U.S.A. The flow fi eld of the reach is constructed from surveyed displacements of 110 markers spaced 2030 m apart. A velocity gradient m ethod is then used to calcul ate values of the principal strain-rate axes ...

This work focuses on the free and forced vibrations of sandwich beams plates hosting an arbitrary number damping cores. A fractional derivatives Zener-type model is adopted for representing frequency-dependent viscoelastic behaviour, along with conventional series developments. The structural models are formulated within established variable kinematics approach, which enables to investigate rol...

An experimental approach is developed and utilized to characterize the fiber-matrix interfacial debonding mechanism its effect on matrix cracking in unidirectional (UD) fiber composites. Local deformation response at interface first studied by analyzing strain fields vicinity of macro fibers single-fiber samples. A practical for identification normal cohesive behavior presented implemented a fi...

BACKGROUND AND PURPOSE Little information is available regarding the anatomy of the intracranial veins and sinuses that can be shown on MR venograms of children. The aim of this study was to determine the normal venous anatomy and anatomic variants. METHODS Fifty children who were referred for investigation of developmental delay and who had normal results of MR imaging of the brain were recr...

Optical and electrical control of the nuclear spin system allows enhancing the sensitivity of NMR applications and spin-based information storage and processing. Dynamic nuclear polarization in semiconductors is commonly achieved in the presence of a stabilizing external magnetic field. Here we report efficient optical pumping of nuclear spins at zero magnetic field in strain-free GaAs quantum ...