Results 1 to 10 of about 99,736 (161)

The reasons why fractional flow reserve and instantaneous wave-free ratio are similar using wave separation analysis [PDF]

BMC Cardiovascular Disorders, 2021
Background and objectives Fractional flow reserve (FFR) and instantaneous wave-free ratio (iFR) are the two most commonly used coronary indices of physiological stenosis severity based on pressure. To minimize the effect of wedge pressure (P wedge ), FFR
Soohong Min, Gwansuk Kang, Dong-Guk Paeng, Joon Hyouk Choi   +3 more
doaj   +5 more sources

Wave separation analysis-derived indexes obtained from radial and carotid tonometry in healthy pregnancy and pregnancy-associated hypertension: Comparison with pulse wave analysis-derived indexes [PDF]

Frontiers in Cardiovascular Medicine, 2022
BackgroundIncreased wave reflections assessed by pulse wave analysis (PWA) was proposed as one of the potential culprits of hypertension seen in women with pregnancy-associated hypertension (PAH).
María M. Pereira, Juan Torrado, Joshua Bock, Claudio Sosa, Alejandro Diaz, Daniel Bia, Yanina Zócalo   +6 more
doaj   +2 more sources

2.2 RE-REFLECTION OF BACKWARD PROPAGATING WAVES LEADS TO AMPLIFICATION OF THE FORWARD PRESSURE WAVE IN WAVE SEPARATION ANALYSIS [PDF]

Artery Research, 2015
Introduction: In wave separation analysis, the pressure wave is decomposed into a single forward and backward component, which actually compounds all forward and backward propagating waves.
Patrick Segers*, Liesbeth Taelman, Joris Degroote, Jan Vierendeels   +3 more
doaj   +2 more sources

Intrafamilial Aggregation and Heritability of Aortic Reflected (Backward) Waves Derived From Wave Separation Analysis. [PDF]

Am J Hypertens, 2015
BACKGROUND Although aortic wave reflection may be inherited, the extent to which indexes of wave reflection derived from wave separation analysis (reflected (backward) wave index (RI) and pressure (Pb)) show intrafamilial aggregation and heritability is uncertain.
Djami-Tchatchou AT, Norton GR, Raymond A, Booysen HL, Hodson B, Libhaber E, Sareli P, Woodiwiss AJ.   +7 more
europepmc   +4 more sources

Wave‐Partition‐Governed Dual‐Site Spallation in Single Crystals [PDF]

Advanced Science
The spall failure in shock‐loaded perfect single crystals reveals significant orientation dependent characteristics, yet the fundamental relationship between shock wave propagation anisotropy and fracture mechanisms remains unclear. Employing large‐scale
Youlin Zhu, Sheng Qian, Lianfu Qiu, Jianian Hu, Guoqiang Luo, Qiang Shen, Qi Tong   +6 more
doaj   +2 more sources

GLOFI – A methodology and toolbox for scale-separation of satellite observations for analysis of gravity waves [PDF]

Atmospheric Measurement Techniques
The direct analysis of atmospheric gravity waves (GWs) in temperature observations is difficult since the much stronger signal of large-scale temperature perturbations such as planetary waves obscure the perturbations due to GWs.
A. J. Mathew, S. Rhode, M. Ern, M. Pramitha, P. Preusse   +4 more
doaj   +5 more sources

Central pulsatile haemodynamics in COPD: a propensity score-matched evaluation of cohorts [PDF]

ERJ Open Research
Background Cardiovascular risk is elevated in patients with COPD. Central haemodynamic measurements via wave separation analysis indicate cardiovascular risk independent of well-known limitations of peripheral blood pressure measurements, but have not ...
Matthias Helmut Urban, Thomas Weber, Siegfried Wassertheurer, Georg-Christian Funk, Bernhard Hametner, Christopher Clemens Mayer, Anna Katharina Mayr, Sara Schramm, Börge Schmidt, Mina Sakhi, Raimund Erbel, Otto Chris Burghuber   +11 more
doaj   +2 more sources

Wave reflection quantification analysis and personalized flow wave estimation based on the central aortic pressure waveform

Frontiers in Physiology, 2023
Pulse wave reflections reflect cardiac afterload and perfusion, which yield valid indicators for monitoring cardiovascular status. Accurate quantification of pressure wave reflections requires the measurement of aortic flow wave.
Hongming Sun, Yang Yao, Wenyan Liu, Shuran Zhou, Shuo Du, Junyi Tan, Yin Yu, Lisheng Xu, Lisheng Xu, Lisheng Xu, Alberto Avolio   +10 more
doaj   +1 more source

Measurement of Pulmonary Artery Wave Reflection Before and After Mitral Valvuloplasty in Canine Patients With Pulmonary Hypertension Caused by Myxomatous Mitral Valve Disease

Frontiers in Veterinary Science, 2021
Background: Pulmonary arterial wave reflection provides novel information about pulmonary artery hemodynamics in pulmonary hypertension (PH). PH is common in dogs with myxomatous mitral valve disease (MMVD), though research examining the relationship ...
Tomohiko Yoshida, Tomohiko Yoshida, Kazumi Shimada, Lina Hamabe, Tsuyoshi Uchide, Ryou Tanaka, Katsuhiro Matsuura, Katsuhiro Matsuura   +7 more
doaj   +1 more source

Non-invasive Assessment of Pulmonary Artery Wave Reflection in Dogs With Suspected Pulmonary Hypertension

Frontiers in Veterinary Science, 2021
Background: Pulmonary arterial wave reflection (PAWR) occurs when the forward blood flow out the right ventricle is reflected by the pulmonary arterial tree, generating a backward wave.
Tomohiko Yoshida, Katsuhiro Matsuura, Goya Seijirow, Akiko Uemura, Zeki Yilmaz, Ryou Tanaka   +5 more
doaj   +1 more source