| Presentation | 2013-07-30 Spatiotemporal Dynamics of Propagating Excitable Nonlinear Waves in Human Interventricular Septum : Transition from Convective to Absolute Instability Yoshifumi Harada, Hiroshi Kanai, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Already we have previously shown that pulsive vibration occurs on the myocardium after electrical stimulation of an isolated heart. In this study, using a novel technique for ultrasonic measurement of the myocardial motion, we detected pulsive vibrations spontaneously caused by electrical excitation and by valve closer. Using a sparse sector scan, the vibrations were measured almost simultaneously at about 10,000 points set in the heart wall at a high temporal resolution. We have successfully found another new type of cardiac dissipative solitary waves resonant interaction together with propagating Bekki Nozaki-hole(BN-hole). These propagating solitary waves play a crucial role in the IVS wall motion and significantly correlated with dynamical behavior of these elastic QRS complex waves. Here, we show, for the first time, that the detailed peculiar cardiac dark multi-solitary waves in the excited waves on a human cardiac IVS play the crucial role in length-dependent force changes of contractile activity when the myocardium exhibits a region of local absolute instability which is sufficiently large. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | CGLE(Complex Ginzburg Landau Equation) / Chaos / Fractal / Interventricular Septum(IVS) / Nonlinear Wave Propagation / Bekk-Nozaki hole / Dark Soliton / Soliton Resonance / VFPGM(Vector field Phase Gradient Mapping) |
| Paper # | US2013-33 |
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| Committee | US |
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| Conference Date | 2013/7/22(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Ultrasonics (US) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Spatiotemporal Dynamics of Propagating Excitable Nonlinear Waves in Human Interventricular Septum : Transition from Convective to Absolute Instability |
| Sub Title (in English) | |
| Keyword(1) | CGLE(Complex Ginzburg Landau Equation) |
| Keyword(2) | Chaos |
| Keyword(3) | Fractal |
| Keyword(4) | Interventricular Septum(IVS) |
| Keyword(5) | Nonlinear Wave Propagation |
| Keyword(6) | Bekk-Nozaki hole |
| Keyword(7) | Dark Soliton |
| Keyword(8) | Soliton Resonance |
| Keyword(9) | VFPGM(Vector field Phase Gradient Mapping) |
| 1st Author's Name | Yoshifumi Harada |
| 1st Author's Affiliation | Fukui Univ.() |
| 2nd Author's Name | Hiroshi Kanai |
| 2nd Author's Affiliation | Touhoku Univ. |
| Date | 2013-07-30 |
| Paper # | US2013-33 |
| Volume (vol) | vol.113 |
| Number (no) | 167 |
| Page | pp.pp.- |
| #Pages | 9 |
| Date of Issue | |