Results 31 to 40 of about 260,398 (191)
Syncope associated with supraventricular tachycardia: Diagnostic role of implantable loop recorders
Annals of Noninvasive Electrocardiology, 2021 Syncope represents a relatively uncommon symptom of supraventricular tachycardia (SVT). It is likely that an impaired autonomic vasomotor response to the hemodynamic stress of tachycardia is the determinant of hemodynamic changes leading to cerebral ...
Stergios Soulaidopoulos +13 more
doaj +1 more source
Design study of time-preserving grating monochromators for ultrashort pulses in the extreme-ultraviolet and soft X-rays [PDF]
, 2017 The design of grating-based instruments to handle and condition coherent ultrafast pulses in the extreme-ultraviolet is discussed. The main application of such instruments is the monochromatization of high-order laser harmonics and free-electron-laser ...
Fabris, Nicola +3 more
core +3 more sources
Diagnostic value of the tilt-table test for the assessment of syncope in children and adolescents
Arquivos Brasileiros de Cardiologia, 2001 OBJECTIVE - To assess the diagnostic value, the characteristics, and feasibility of tilt-table testing in children and adolescents. METHODS - From August 1991 to June 1997, we retrospectively assessed 94 patients under the age of 18 years who had a ...
Tan Chen Wu +3 more
doaj +1 more source
Cooccurrence of Postural Orthostatic Tachycardia Syndrome with Two Different Clinical Entities
Case Reports in Pediatrics, 2016 Postural orthostatic tachycardia syndrome (POTS) is an abnormal heart rate response to a positional change. Several potential mechanisms for pathophysiology of POTS are defined. This syndrome can coexist with different clinical situations. In our report,
Funda Oztunc +4 more
doaj +1 more source
Folding a 2-D powder diffraction image into a 1-D scan: a new procedure
, 2006 A new procedure aiming at folding a powder diffraction 2-D into a 1-D scan is presented. The technique consists of three steps: tracking the beam centre by means of a Simulated Annealing (SA) of the diffraction rings along the same axis, detector tilt ...
Cervellino, Antonio +3 more
core +1 more source
Advanced Biomedical Research, 2016 Background: Syncope is an important and common clinical condition, and the neurally mediated syncope is the most frequent type of syncope. Tilt testing is considered as a first-line diagnostic test.
Bahar Dehghan, Mohammad Reza Sabri
doaj +1 more source
, 2015 This study examined the effect of passengers' active head-tilt and eyes-open/closed conditions on the severity of motion sickness in the lateral acceleration environment of cars.
Wada, Takahiro, Yoshida, Keigo
core +1 more source
A method for measuring the contact area in instrumented indentation testing by tip scanning probe microscopy imaging [PDF]
, 2014 The determination of the contact area is a key step to derive mechanical properties such as hardness or an elastic modulus by instrumented indentation testing. Two families of procedures are dedicated to extracting this area: on the one hand, post mortem
Charleux, L. +5 more
core +5 more sources
The Scientific World Journal, 2012 The study aim was to assess sympathetic vasomotor response (SVR) by using pulsed wave Doppler (PWD) ultrasound in patients with multiple system atrophy (MSA) and correlate with the tilt table study.
Ke-Vin Chang +6 more
doaj +1 more source
Test of the isotropy of the speed of light using a continuously rotating optical resonator
, 2005 We report on a test of Lorentz invariance performed by comparing the resonance frequencies of one stationary optical resonator and one continuously rotating on a precision air bearing turntable.
A. A. Michelson +6 more
core +1 more source