Results 21 to 30 of about 24,156,865 (214)

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

Changes in the Pulmonary Artery Wave Reflection in Dogs with Experimentally-Induced Acute Pulmonary Embolism and the Effect of Vasodilator

Animals, 2021
Pulmonary hypertension (PH) is a complex syndrome that has been frequently diagnosed in dogs and humans and can be detected by Doppler echocardiography and invasive catheterization. Recently, PAWR attracts much attention as a noninvasive approach for the
Tomohiko Yoshida, Ahmed S. Mandour, Katsuhiro Matsuura, Kazumi Shimada, Hussein M. El-Husseiny, Lina Hamabe, Zeki Yilmaz, Akiko Uemura, Ryou Tanaka   +8 more
doaj   +1 more source

Wave Reflection and Ventriculo-Arterial Coupling in Bicuspid Aortic Valve Patients With Repaired Aortic Coarctation

Frontiers in Pediatrics, 2022
BackgroundVentriculo-arterial (VA) coupling in bicuspid aortic valve (BAV) patients can be affected by the global aortopathy characterizing BAV disease and the presence of concomitant congenital lesions such as aortic coarctation (COA).
Elena Giulia Milano, Elena Giulia Milano, Sandra Neumann, Froso Sophocleous, Giulia Pontecorboli, Stephanie L. Curtis, Radwa Bedair, Massimo Caputo, Massimo Caputo, Giovanni Battista Luciani, Chiara Bucciarelli-Ducci, Giovanni Biglino, Giovanni Biglino   +12 more
doaj   +1 more source

Feasibility of Estimation of Aortic Wave Intensity Using Non-invasive Pressure Recordings in the Absence of Flow Velocity in Man

Frontiers in Physiology, 2020
BackgroundWave intensity analysis provides valuable information on ventriculo-arterial function, hemodynamics, and energy transfer in the arterial circulation. Widespread use of wave intensity analysis is limited by the need for concurrent measurement of
Alun D. Hughes, Chloe Park, Anenta Ramakrishnan, Anenta Ramakrishnan, Jamil Mayet, Nish Chaturvedi, Kim H. Parker   +6 more
doaj   +1 more source

Limited value of pulse wave analysis in assessing arterial wave reflection and stiffness in the pulmonary artery

Physiological Reports, 2021
We explored the use of the augmentation index (AI) based on pulse wave analysis (PWA) in the pulmonary circulation as a measure of wave reflection and arterial stiffness in individuals with and without pulmonary arterial hypertension (PAH) and chronic ...
Junjing Su, Ulf Simonsen, Soren Mellemkjaer, Luke S. Howard, Charlotte Manisty, Alun D. Hughes   +5 more
doaj   +1 more source

Deleterious Effects of Cold Air Inhalation on Coronary Physiological Indices in Patients With Obstructive Coronary Artery Disease

Journal of the American Heart Association: Cardiovascular and Cerebrovascular Disease, 2018
Background Cold air inhalation during exercise increases cardiac mortality, but the pathophysiology is unclear. During cold and exercise, dual‐sensor intracoronary wires measured coronary microvascular resistance (MVR) and blood flow velocity (CBF), and ...
Rupert P. Williams, Kaleab N. Asrress, Matthew Lumley, Satpal Arri, Tiffany Patterson, Howard Ellis, Vasiliki Manou‐Stathopoulou, Catherine Macfarlane, Shruthi Chandran, Kostantinos Moschonas, Pippa Oakeshott, Timothy Lockie, Amedeo Chiribiri, Brian Clapp, Divaka Perera, Sven Plein, Michael S. Marber, Simon R. Redwood   +17 more
doaj   +1 more source

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

Frontiers 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, Chloe M. Park, Alun D. Hughes, Michael Y. Henein, Michael Y. Henein, Ashraf W. Khir   +5 more
doaj   +1 more source

3.5 NON-INVASIVE US-BASED WAVE INTENSITY ANALYSIS IN MICE

Artery Research, 2016
Wave Intensity Analysis (WIA) can provide information about the interaction between vascular and cardiac system. WIA-derived indexes have quantitative physiological meaning.
Nicole Di Lascio, Claudia Kusmic, Francesco Stea, Francesca Lenzarini, Francesco Faita   +4 more
doaj   +1 more source

Measuring the Interaction Between the Macro- and Micro-Vasculature

Frontiers in Cardiovascular Medicine, 2019
Structural and functional dysfunction in both the macro- and microvasculature are a feature of essential hypertension. In a healthy cardiovascular system, the elastic properties of the large arteries ensure that pulsations in pressure and flow generated ...
Rachel E. Climie, Rachel E. Climie, Rachel E. Climie, Antonio Gallo, Antonio Gallo, Dean S. Picone, Nicole Di Lascio, Thomas T. van Sloten, Thomas T. van Sloten, Andrea Guala, Christopher C. Mayer, Bernhard Hametner, Rosa Maria Bruno   +12 more
doaj   +1 more source

Ground-based VLF wave intensity variations investigated by the principal component analysis

Earth, Planets and Space, 2022
Very low frequency wave intensity variations measured by the Kannuslehto station, Finland in the frequency range 0–12 kHz between 2016 and 2020 are analyzed by the principal component analysis (PCA).
Barbora Bezděková, František Němec, Jyrki Manninen   +2 more
doaj   +1 more source