| Presentation | 2004/1/21 Propagation Mode of Pulsatile Components Propagating along the Heart Wall Hiroshi KANAI, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | It has been found that myocardial motion exhibits frequency components of up to 100 Hz for the first time by developing a phased tracking method. Especially at end-systole just before the timing of the aortic valve closure, a pulsive wave was detected with high reproducibility in the large movement of the interventricular septum (IVS). By modifying a conventional ultrasonic diagnosis equipment to allow about 10 scan lines from a sector scanner to arbitrarily selected in real time, the myocardial pulsive waves were detected simultaneously at 150 points set from the base to the apex along the IVS. It propagated from the root of the aortic valve to the apex side along the IVS, where the vibration direction was perpendicular to the IVS. In this paper, by determining the wavelength of the pulsatile wave, the frequency dependence of the phase velocity of the pulsatile wave is shown in the frequency range from 20 Hz to 90 Hz. From in vivo experimental results, it is shown that the vibration mode corresponds to the SV-wave. This method offers potential for imaging based on the tissue characteristics in wide frequency range, which cannot be recognized by conventional echocardiography. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | heart wall tracking / heart wall vibration / myocardial motion / spatial distribution / phased tracking method |
| Paper # | EA2003-139 |
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| Conference Information | |
| Committee | EA |
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| Conference Date | 2004/1/21(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Engineering Acoustics (EA) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Propagation Mode of Pulsatile Components Propagating along the Heart Wall |
| Sub Title (in English) | |
| Keyword(1) | heart wall tracking |
| Keyword(2) | heart wall vibration |
| Keyword(3) | myocardial motion |
| Keyword(4) | spatial distribution |
| Keyword(5) | phased tracking method |
| 1st Author's Name | Hiroshi KANAI |
| 1st Author's Affiliation | Graduate School of Engineering, Tohoku University() |
| Date | 2004/1/21 |
| Paper # | EA2003-139 |
| Volume (vol) | vol.103 |
| Number (no) | 608 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |