Results 51 to 60 of about 413,548 (214)

A narrative review of clinical applications of systolic time intervals

open access: yesJournal of the Practice of Cardiovascular Sciences, 2022
Systolic time interval (STI) estimation is an established noninvasive method for the quantifiable assessment of left ventricular (LV) performance in well-being and disease states; it stays valuable for clinical application and forms no burden to the ...
Smitha Pernaje Seetharam   +2 more
doaj   +1 more source

Higher Complement C4 Gene Copy Number Constitutes a Shared Genetic Risk Factor for Giant Cell Arteritis and IgA Vasculitis

open access: yesArthritis &Rheumatology, EarlyView.
Objective Low copy number (CN) of complement C4 isoforms and high CN of retroviral HERV‐K elements are known risk factors for many immune‐mediated inflammatory diseases (IMIDs), often showing sex‐biased effects. Here, we assessed whether CN variation within the C4 gene contributes to giant cell arteritis (GCA) and IgA vasculitis (IgAV), two complex ...
Laura Martínez‐Gutiérrez   +295 more
wiley   +1 more source

Determination of the vector velocity of artificial ionospheric irregularities based on Doppler measurements by the bi-static scatter method of HF radio signals propagating over long radio paths

open access: yesSolar-Terrestrial Physics
During experiments on the modification of the high-latitude ionosphere by high-power HF radio waves of ordinary or extraordinary polarization of the EISCAT/Heating facility (Tromsø, Norway) in 2013, 2016, and 2019, Doppler measurements of diagnostic HF ...
Borisova T. D.   +3 more
doaj   +1 more source

E-region decameter-scale plasma waves observed by the dual TIGER HF radars [PDF]

open access: yesAnnales Geophysicae, 2009
The dual Tasman International Geospace Environment Radar (TIGER) HF radars regularly observe E-region echoes at sub-auroral magnetic latitudes 58°–60° S including during geomagnetic storms.
B. A. Carter, R. A. Makarevich
doaj   +1 more source

Growth differentiation factor‐15 and N‐terminal pro‐BNP in acute heart failure with preserved ejection fraction

open access: yesESC Heart Failure, Volume 12, Issue 2, Page 888-899, April 2025.
Abstract Aims Heart failure with preserved ejection fraction (HFpEF) continues to be an increasingly common health problem associated with a high mortality rate. Elevated levels of Growth differentiation factor‐15 (GDF15) and N‐terminal pro‐brain natriuretic peptide (NT‐proBNP) are reportedly associated with poor clinical outcomes in a broad range of ...
Yoichiro Otaki   +11 more
wiley   +1 more source

HF Doppler radar observations of low‐latitude spread F [PDF]

open access: yesRadio Science, 2009
HF (5.5 MHz) Doppler radar observations of nonspread F and spread F echoes over Visakhapatnam (17.7°N, 83.3°E; dip 20°) are presented. The echoes appearing suddenly and nearly simultaneously in 16 successive range bins at 7.5 km intervals in association with spread F have been investigated. Two to five episodes of spread F activity were found to appear
C. R. Reddi   +2 more
openaire   +1 more source

Metabolic abnormalities and reprogramming in cats with naturally occurring hypertrophic cardiomyopathy

open access: yesESC Heart Failure, Volume 12, Issue 2, Page 1256-1270, April 2025.
Abstract Background and aims The heart is a metabolic organ rich in mitochondria. The failing heart reprograms to utilize different energy substrates, which increase its oxygen consumption. These adaptive changes contribute to increased oxidative stress.
Qinghong Li   +12 more
wiley   +1 more source

Meridional motions of the afternoon radar aurora, auroral electrojets, and absorption patches under variable IMF conditions [PDF]

open access: yes, 2004
International audienceThe meridional motions of the CUTLASS HF and STARE VHF coherent echoes, IMAGE equivalent electrojet currents, and IRIS absorption patches during the postnoon/early-evening event of 14 February 2000 are presented.
Uspensky, M. V.   +7 more
core   +2 more sources

Letter to the editor
CUTLASS observations of a high-m ULF wave and its consequences for the DOPE HF Doppler sounder
[PDF]

open access: yesAnnales Geophysicae, 1999
The CUTLASS (Co-operative UK Twin Located Auroral Sounding System) Finland HF radar, whilst operating in a high spatial and temporal resolution mode, has measured the ionospheric signature of a naturally occurring ULF wave in scatter artificially ...
D. M. Wright, D. M. Wright, T. K. Yeoman
doaj   +1 more source

Prognostic role of TAPSE to PASP ratio in outpatients with left ventricular systolic dysfunction

open access: yesESC Heart Failure, Volume 12, Issue 2, Page 912-922, April 2025.
Abstract Aims Few data are available regarding the role of tricuspid annulus plane systolic excursion to pulmonary artery systolic pressure (TAPSE/PASP), a measurement of right ventricular to pulmonary artery coupling, in patients with chronic heart failure and left ventricular systolic dysfunction.
Mauro Riccardi   +9 more
wiley   +1 more source

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