Results 11 to 20 of about 100,022 (259)

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

Aortic Pressure Levels and Waveform Indexes in People Living With Human Immunodeficiency Virus: Impact of Calibration Method on the Differences With Respect to Non-HIV Subjects and Optimal Values

Frontiers in Cardiovascular Medicine, 2021
Background: There are scarce and controversial data on whether human immunodeficiency virus (HIV) infection is associated with changes in aortic pressure (aoBP) and waveform-derived indexes.
Alejandro Diaz, Marina Grand, Marina Grand, Juan Torrado, Federico Salazar, Yanina Zócalo, Daniel Bia   +6 more
doaj   +1 more source

Prediction of Cardiovascular Events by Pulse Waveform Parameters: Analysis of CARTaGENE

Journal of the American Heart Association: Cardiovascular and Cerebrovascular Disease, 2022
Background Waveform parameters provide approximate data about aortic wave reflection. However, their association with cardiovascular events remains controversial and their role in cardiovascular prediction is unknown.
Louis‐Charles Desbiens, Catherine Fortier, Annie‐Claire Nadeau‐Fredette, François Madore, Bernhard Hametner, Siegfried Wassertheurer, Mohsen Agharazii, Rémi Goupil   +7 more
doaj   +1 more source

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

Frontiers 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, Tokuhisa Uejima, Syunta Komeda, Katsuhiro Matsuura, Akiko Uemura, Hiromasa Hayama, Takeshi Yamashita, Zeki Yilmaz, Ryou Tanaka   +8 more
doaj   +1 more source

Unsteady Motion of Shock Wave for a Supersonic Compression Ramp Flow Based on Large Eddy Simulation

Frontiers in Energy Research, 2022
A large eddy simulation (LES) is conducted to investigate shock wave/turbulent boundary layer interaction in a 24° compression ramp at a high inlet Mach number of Ma=2.9.
Xing Huang, Li-Xu Wang, Dong-Dong Zhong, Ning Ge   +3 more
doaj   +1 more source

Comparison of arterial waves derived by classical wave separation and wave intensity analysis in a model of aortic coarctation [PDF]

Medical & Biological Engineering & Computing, 2008
Coarctation of the aorta may develop during fetal life and impair quality of life in the adult because upper body hypertension and aneurysm formation in the descending aorta may develop. We used our computational model of the young adult arterial circulation, incorporated aorta coarctation over a range from 0 to 80% and evaluated the effects in terms ...
Jeroen P. H. M. van den Wijngaard, Maria Siebes, Berend E. Westerhof   +2 more
openaire   +5 more sources

Multiuser separation and performance analysis of millimeter wave channels with linear precoding [PDF]

2016 IEEE International Conference on Communication, Networks and Satellite (COMNETSAT), 2016
IEEE International Conference on Communication, Networks and Satellite (COMNETSAT) (IEEE COMNETSAT 2016)
Waqas Ahmad, Geamel Alyami, Ivica Kostanic   +2 more
openaire   +2 more sources

The importance of wave reflection: A comparison of wave intensity analysis and separation of pressure into forward and backward components [PDF]

2013 35th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC), 2013
Waves and wave reflections play an undoubted role in arterial hemodynamics. Wave intensity analysis and separation of pressure into forward and backward components can both be used to analyze wave phenomena in arteries, but result in different interpretations regarding the contribution of wave reflections to the aorta blood pressure waveform.
Alun D. Hughes, Justin E. Davies, Kim H. Parker   +2 more
openaire   +2 more sources

Measurement, Analysis and Interpretation of Pressure/Flow Waves in Blood Vessels

Frontiers in Physiology, 2020
The optimal performance of the cardiovascular system, as well as the break-down of this performance with disease, both involve complex biomechanical interactions between the heart, conduit vascular networks and microvascular beds.
Jonathan P. Mynard, Jonathan P. Mynard, Jonathan P. Mynard, Jonathan P. Mynard, Avinash Kondiboyina, Avinash Kondiboyina, Remi Kowalski, Remi Kowalski, Remi Kowalski, Michael M. H. Cheung, Michael M. H. Cheung, Michael M. H. Cheung, Joseph J. Smolich, Joseph J. Smolich   +13 more
doaj   +1 more source

Prognostic Value of Carotid and Radial Artery Reservoir‐Wave Parameters in End‐Stage Renal Disease

Journal of the American Heart Association: Cardiovascular and Cerebrovascular Disease, 2019
Background Reservoir‐wave approach is an alternative model of arterial hemodynamics based on the assumption that measured arterial pressure is composed of volume‐related (reservoir pressure) and wave‐related components (excess pressure).
Catherine Fortier, Gabrielle Côté, Fabrice Mac‐Way, Rémi Goupil, Louis‐Charles Desbiens, Marie‐Pier Desjardins, Karine Marquis, Bernhard Hametner, Siegfried Wassertheurer, Martin G. Schultz, James E. Sharman, Mohsen Agharazii   +11 more
doaj   +1 more source