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“Wave” as defined by wave intensity analysis
Medical & Biological Engineering & Computing, 2008The propagation of waves in the arteries is generally described using Fourier analysis in terms of periodic wavetrains formed by the superposition of a mean value and sinusoidal waves at the fundamental frequency (defined by the heart rate) and its harmonics.
Jiun-Jr Wang +3 more
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Wave intensity analysis and the development of the reservoir–wave approach
Medical & Biological Engineering & Computing, 2009The parameters of wave intensity analysis are calculated from incremental changes in pressure and velocity. While it is clear that forward- and backward-traveling waves induce incremental changes in pressure, not all incremental changes in pressure are due to waves; changes in pressure may also be due to changes in the volume of a compliant structure ...
John V. Tyberg +9 more
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Brief commentary on coronary wave-intensity analysis
Journal of Applied Physiology, 2000coronary pressure-flow relations have long interested physiologists but are so complex that even today they have still not been completely unraveled. Early investigators like Rebatel in 1872 (Ref.
J I, Hoffman, W M, Chilian
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Wave intensity analysis of para-aortic counterpulsation
American Journal of Physiology-Heart and Circulatory Physiology, 2012Wave intensity analysis (WIA) was used to delineate and maximize the efficacy of a newly developed para-aortic blood pump (PABP). The intra-aortic balloon pump (IABP) was employed as the comparison benchmark. Acute porcine experiments using eight pigs, randomly divided into IABP ( n = 4) and PABP ( n = 4) groups, were conducted to compare the ...
Pong-Jeu, Lu +5 more
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Wave Intensity Analysis of Left Ventricular Filling
Journal of Biomechanical Engineering, 2005Wave intensity analysis (WIA) is a powerful technique to study pressure and flow velocity waves in the time domain in vascular networks. The method is based on the analysis of energy transported by the wave through computation of the wave intensity dI=dPdU, where dP and dU denote pressure and flow velocity changes per time interval, respectively.
L L, Lanoye +3 more
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Coronary Wave Enhancement for Robust Wave Intensity Analysis
2018 International Conference on Applied Electromagnetics, Signal Processing and Communication (AESPC), 2018Analysis of coronary wave intensity is a hemodynamic index that can exhibit the arterial system and working condition of heart. Apart from electrocardiogram (ECG) research it is a new direction of cardiac disease analysis in non-invasive way. However practically it is noisy in nature.
Swapnil Mishra +2 more
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Wave intensity analysis from the common carotid artery: a new noninvasive index of cerebral vasomotor tone [PDF]
Heart and Vessels, 2003 Cerebral vasomotor tone is difficult to assess in patients. Wave intensity analysis has been applied to resolve complex upstream and downstream events within the vascular system.
Christopher J H Jones +2 more
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Wave-intensity analysis: a new approach to coronary hemodynamics
Journal of Applied Physiology, 2000In 10 anesthetized dogs, we measured high-fidelity left circumflex coronary (PLCx), aortic (PAo), and left ventricular (PLV) pressures and left circumflex velocity ( U LCx; Doppler) and used wave-intensity analysis (WIA) to identify the determinants of PLCx and U LCx.
Y H, Sun +3 more
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2018
Originally Wave Intensity was defined as the product of differences in pressure, dP=P(t + Δt)–P(t) and velocity, dv = v(t + Δt)–v(t), as dP·dv. This implies that their product, dP·dv is in Watt·m−2, and depends on the sampling time, Δt, which makes quantitative comparison between studies, when Δt is not reported, difficult.
Nicolaas Westerhof +3 more
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Originally Wave Intensity was defined as the product of differences in pressure, dP=P(t + Δt)–P(t) and velocity, dv = v(t + Δt)–v(t), as dP·dv. This implies that their product, dP·dv is in Watt·m−2, and depends on the sampling time, Δt, which makes quantitative comparison between studies, when Δt is not reported, difficult.
Nicolaas Westerhof +3 more
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Wave speed and intensity in the canine aorta: Analysis with and without the Windkessel-wave system
2011 Annual International Conference of the IEEE Engineering in Medicine and Biology Society, 2011The Windkessel model, coupled with the wave propagation theory, was applied to data measured in the ascending aorta of 11 anaesthetised dogs during total aortic occlusion at the thoracic and diaphragm levels. Wave speed and wave intensity were calculated using the measured pressure (P) and velocity (U), and separately using the pressure due to the wave
Alessandra Borlotti, Ashraf W. Khir
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