Paper Abstract and Keywords |
Presentation |
2011-07-29 10:30
Visualization of Nonlinear Wave Propagation on Cardiac Tissue [ I ]
-- Presentative Vector Field Aproach on Phase Gradient -- Yoshifumi Harada (Fukui Univ.), Akinori Inoue, Takashi Okada, Akimitsu Harada, Yoshihiro Yoshikawa (HAM), Naoaki Bekki (Nihon Univ.), Hiroshi Kanai (Tohoku Univ.) US2011-32 |
Abstract |
(in Japanese) |
(See Japanese page) |
(in English) |
Abstract In human heart, it is responsible for pumping blood through the blood vessels by repeated, rhythmic contractions. The ability to noninvasively detect regional dynamic myocardial damage related to action potentials and mechanical properties affected by heart disease is of great clinical importance. The most well known are the significant recent development of the ultrasonic measurement of myocardial motion in vivo already found by Kanai et’al [1], for the first time, by which some pulsive waves are spontaneously excited by aortic-valve closure(AVC) at end-systole(T0) [1]. They measured these vibrations almost simultaneously at about 10,000 points set in the heart wall at a high temporal resolution by using a sparse sector scan. On the other hand, the phase-dynamics approach to the investigation of oscillatory media has played a major role, but it has mainly been applied to only spatially local systems and globally coupled systems. The quantitative analysis of these complex spatiotemporal patterns of activation require the development of new tools that allow for identifying and tracking the most important topological feature of the patterns such as cardiac fibrillation. In this presentation, we have proposed , for the first time, “ the vector field phase gradient mapping method with phase singularity(VFPGM) ” and would like to demonstrate quantitative analysis of complex self-excitatory wave patterns such as cardiac myocardial motion by using vector analytical approach for this VFPGM. |
Keyword |
(in Japanese) |
(See Japanese page) |
(in English) |
Keyword CGLE(Complex Ginzburg Landau Equation),Chaos,Fractal,PHS(Propagating Hole Solution), vector field phase gradient mapping method(VFPGM), / Chaos, / Fractal / PHS(Propagating Hole Solution), / vector field phase gradient mapping method(VFPGM), / / / |
Reference Info. |
IEICE Tech. Rep., vol. 111, no. 158, US2011-32, pp. 55-60, July 2011. |
Paper # |
US2011-32 |
Date of Issue |
2011-07-21 (US) |
ISSN |
Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 |
Copyright and reproduction |
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US2011-32 |
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