Results 151 to 160 of about 536,169 (330)

Long QT syndrome diagnosis may be affected by positive tilt table test; a cross-sectional study [PDF]

open access: green, 2023
Mohammad Hossein Nikoo   +5 more
openalex   +1 more source

Postural tachycardia syndrome: current perspectives

open access: yesVascular Health and Risk Management, 2017
Rachel Wells,1,2 Andrew J Spurrier,3 Dominik Linz,1 Celine Gallagher,1 Rajiv Mahajan,1 Prashanthan Sanders,1 Amanda Page,4 Dennis H Lau1 1Centre for Heart Rhythm Disorders, South Australian Health and Medical Research Institute, University of Adelaide ...
Wells R   +7 more
doaj  

Cardiac repolarization abnormalities and neurally mediated syncope: overlooked aspects in the diagnosis of pheochromocytoma

open access: yesInternational Journal of Arrhythmia
Background Pheochromocytoma is a rare catecholamine-producing tumour originating from adrenal chromaffin cells. Classic clinical presentation includes headache, diaphoresis and palpitation.
Elisama Pimentel Zamian Cotias   +5 more
doaj   +1 more source

Femtosecond Single‐ and Double‐Pulse Fabrication of Periodic Nanostructures on Stainless Steel for Surface‐Enhanced Raman Spectroscopy

open access: yesAdvanced Engineering Materials, EarlyView.
Periodic submicron features are fabricated on 304 stainless steel using single and double femtosecond laser pulses. By adjusting polarization, fluence, and inter‐pulse delay, 1D and 2D nanostructures are formed. Enhanced hydrophobicity and dense surface‐enhanced Raman spectroscopy hotspots enable analyte detection down to 10−10 M with good ...
Balaji Baskar   +3 more
wiley   +1 more source

Cardiac and Musculoskeletal Responses to the Effects of Passive and Active Tilt Test in Healthy Subjects

open access: yesArquivos Brasileiros de Cardiologia
Background: Maintenance of orthostatism requires the interaction of autonomic and muscle responses for an efficient postural control, to minimize body motion and facilitate venous return in a common type of syncope called neurocardiogenic syncope (NCS ...
Rogerio Ferreira Liporaci   +5 more
doaj   +1 more source

Stroke saturation on a MEMS deformable mirror for woofer-tweeter adaptive optics

open access: yes, 2009
High-contrast imaging of extrasolar planet candidates around a main-sequence star has recently been realized from the ground using current adaptive optics (AO) systems. Advancing such observations will be a task for the Gemini Planet Imager, an upcoming "
Bruce Macintosh   +30 more
core   +1 more source

Simultaneous eeg and transcranial doppler during tilt table testing: Correlation with positivity type? [PDF]

open access: bronze, 2001
S Silvani   +6 more
openalex   +1 more source

Tribology of ZrC Coatings and Spherical Tips Acquired with Extraordinarily Stiff, Metal Atomic Force Microscopy Probes

open access: yesAdvanced Engineering Materials, EarlyView.
In this research, ZrC coatings are evaluated against various counterprobes at the microscale using novel super‐stiff atomic force microscopy cantilevers. The chemical composition of the coating is shown to be an important factor influencing coating hardness and Young's modulus, while surface roughness, counterprobe hardness, and surface energy are the ...
Piotr Jenczyk   +4 more
wiley   +1 more source

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