Results 1 to 10 of about 77,992 (260)

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

open access: yesFrontiers 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   +10 more
doaj   +2 more sources

Estimation of Pulmonary Arterial Wave Reflection by Echo-Doppler: A Preliminary Study in Dogs With Experimentally-Induced Acute Pulmonary Embolism [PDF]

open access: yesFrontiers in Physiology, 2021
Background: Pulmonary arterial (PA) wave reflection provides additional information for assessing right ventricular afterload, but its applications is hampered by the need for invasive pressure and flow measurements.
Tomohiko Yoshida   +8 more
doaj   +2 more sources

Mechanisms of Aortic Flow Deceleration and the Effect of Wave Reflection on Left Ventricular Function [PDF]

open access: yesFrontiers in Physiology, 2020
Increased wave reflection is an independent predictor of cardiovascular events, possibly due to effects on left ventricular (LV) function. We investigated the relationship between reflected waves in early systole, the forward decompression wave in mid ...
Chloe M. Park   +5 more
doaj   +2 more sources

Acute systemic inflammation reduces both carotid and aortic wave reflection in healthy adults [PDF]

open access: yesPhysiological Reports, 2019
Acute inflammation increases the risk of cardiac and cerebrovascular events, possibly related to alterations in the hemodynamic load. Wave reflection at the aorta and carotid provides insight into downstream vascular changes and hemodynamic load at the ...
Elizabeth C. Schroeder   +3 more
doaj   +2 more sources

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

open access: yesFrontiers 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   +7 more
doaj   +2 more sources

Racial Differences in Left Ventricular Mass and Wave Reflection Intensity in Children [PDF]

open access: yesFrontiers in Pediatrics, 2020
The burden of heart failure is disproportionately higher in African Americans, with a higher prevalence seen at an early age. Examination of racial differences in left ventricular mass (LVM) in childhood may offer insight into risk for cardiac target ...
Kevin S. Heffernan   +4 more
doaj   +2 more sources

Wave reflection: Myth or reality? [PDF]

open access: yesArtery Research, 2012
Patrick Segers   +4 more
doaj   +3 more sources

ADE-FDTD method for study of two-dimensional electromagnetic wave propagation in lossy lorentz medium [PDF]

open access: yesMATEC Web of Conferences, 2020
In order to study the reflection of electromagnetic wave in Lorentz medium layer, the finite difference time domain method of auxiliary differential equation (ADE-FDTD) is used to derive the difference formula of two-dimensional TM wave propagating in ...
Chen Bingkang
doaj   +1 more source

A novel and simple passive absorption system for wave-current flumes

open access: yesAlexandria Engineering Journal, 2023
The physical limitations of experimental facilities, such as the walls and downstream gate of wave-current flumes, can cause excessive wave reflection.
Filipe Miranda   +6 more
doaj   +1 more source

P.05 Development and Validation of a Novel Centroid Method for Estimating Effective Reflection Time

open access: yesArtery Research, 2020
Background: The time at which reflected waves arrive at central arteries has an important influence on ventricular afterload. Current methods of estimating reflection time (RT), including zero-crossover [1], inflection-point [2], and foot methods [3 ...
Avinash Kondiboyina   +3 more
doaj   +1 more source

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